TY  - CONF
AU  - Grujičić, Marija
AU  - Jelić, Marko
AU  - Stojković Simatović, Ivana
AU  - Bajuk Bogdanović, Danica
AU  - Petković, Darija
AU  - Jovanović, Zoran
AU  - Jovanović, Sonja
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12317
AB  - In this study, solvothermally synthesized nanoparticles of cobalt ferrite (CoFe2O4, CFO) and Zn/Ga-dopped cobalt ferrite (Co0.5Zn0.5Fe2O4, CFO_Zn and CoFe1.5Ga0.5O4, CFO_Ga, respectively) with dihydrocaffeic acid (DHCA) as a surfactant were examined for electrochemical detection of gallic acid. Based on X-ray diffraction analysis, diffraction maxima of all samples correspond to the cubic spinel phase, while transmission electron microscopy showed that the nanoparticles are non-agglomerated, sphere-like with an average size of 5±1 nm. The presence of DHCA on the surface of nanoparticles was confirmed by Fourier Transform Infrared Spectroscopy (FTIR). For the purpose of electrochemical detection of gallic acid the modified glassy carbon electrode (m-GCE) was prepared from CFO, CFO_Zn and CFO_Ga nanoparticles. Initial tests have shown instability/disintegration of m-GCE in aqueous solutions, because of which samples were annealed at 450 °C in air. Cyclic voltammograms of all annealed samples showed good reversibility in the system [Fe(CN)6] 3-/4- . The most efficient electron transfer was achieved when the mass ratio between sample and Nafion® was 85:15, respectively. The best sensitivity to gallic acid (10-4 M, in Britton-Robinson buffer) was observed for CFO_Zn sample. Results are showing that by selective functionalization and surface modification of nanoparticles, it is possible to optimize the electrochemical properties suitable for sensing, which is the basis of this method and the goal of further research.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
T1  - Enhanced electrochemical detection of gallic acid using modified glassy carbon electrodes with Zn/Ga-dopped cobalt ferrite
SP  - 44
EP  - 44
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12317
ER  - 

@conference{
author = "Grujičić, Marija and Jelić, Marko and Stojković Simatović, Ivana and Bajuk Bogdanović, Danica and Petković, Darija and Jovanović, Zoran and Jovanović, Sonja",
year = "2023",
abstract = "In this study, solvothermally synthesized nanoparticles of cobalt ferrite (CoFe2O4, CFO) and Zn/Ga-dopped cobalt ferrite (Co0.5Zn0.5Fe2O4, CFO_Zn and CoFe1.5Ga0.5O4, CFO_Ga, respectively) with dihydrocaffeic acid (DHCA) as a surfactant were examined for electrochemical detection of gallic acid. Based on X-ray diffraction analysis, diffraction maxima of all samples correspond to the cubic spinel phase, while transmission electron microscopy showed that the nanoparticles are non-agglomerated, sphere-like with an average size of 5±1 nm. The presence of DHCA on the surface of nanoparticles was confirmed by Fourier Transform Infrared Spectroscopy (FTIR). For the purpose of electrochemical detection of gallic acid the modified glassy carbon electrode (m-GCE) was prepared from CFO, CFO_Zn and CFO_Ga nanoparticles. Initial tests have shown instability/disintegration of m-GCE in aqueous solutions, because of which samples were annealed at 450 °C in air. Cyclic voltammograms of all annealed samples showed good reversibility in the system [Fe(CN)6] 3-/4- . The most efficient electron transfer was achieved when the mass ratio between sample and Nafion® was 85:15, respectively. The best sensitivity to gallic acid (10-4 M, in Britton-Robinson buffer) was observed for CFO_Zn sample. Results are showing that by selective functionalization and surface modification of nanoparticles, it is possible to optimize the electrochemical properties suitable for sensing, which is the basis of this method and the goal of further research.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts",
title = "Enhanced electrochemical detection of gallic acid using modified glassy carbon electrodes with Zn/Ga-dopped cobalt ferrite",
pages = "44-44",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12317"
}

Grujičić, M., Jelić, M., Stojković Simatović, I., Bajuk Bogdanović, D., Petković, D., Jovanović, Z.,& Jovanović, S.. (2023). Enhanced electrochemical detection of gallic acid using modified glassy carbon electrodes with Zn/Ga-dopped cobalt ferrite. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
Belgrade : Institute of Technical Sciences of SASA., 44-44.
https://hdl.handle.net/21.15107/rcub_vinar_12317

Grujičić M, Jelić M, Stojković Simatović I, Bajuk Bogdanović D, Petković D, Jovanović Z, Jovanović S. Enhanced electrochemical detection of gallic acid using modified glassy carbon electrodes with Zn/Ga-dopped cobalt ferrite. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts. 2023;:44-44.
https://hdl.handle.net/21.15107/rcub_vinar_12317 .

Grujičić, Marija, Jelić, Marko, Stojković Simatović, Ivana, Bajuk Bogdanović, Danica, Petković, Darija, Jovanović, Zoran, Jovanović, Sonja, "Enhanced electrochemical detection of gallic acid using modified glassy carbon electrodes with Zn/Ga-dopped cobalt ferrite" in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts (2023):44-44,
https://hdl.handle.net/21.15107/rcub_vinar_12317 .

TY  - CONF
AU  - Mravik, Željko
AU  - Pejčić, Milica
AU  - Rmuš Mravik, Jelena
AU  - Belec, Blaž
AU  - Bajuk-Bogdanović, Danica
AU  - Jovanović, Sonja
AU  - Marković, Smilja
AU  - Gavrilov, Nemanja
AU  - Skuratov, Vladimir
AU  - Jovanović, Zoran
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11637
AB  - In recent years graphene oxide (GO)/12-tungstophosphoric acid (WPA) nanocomposites have demonstrated promising potential for electrochemical supercapacitors. However, to enhance their performance, it is necessary to modify the surface chemistry of GO to minimize the influence of basal plane oxygen groups, which hinder the material's conductivity. Additionally, some degree of structural modification of WPA is desired. In this regard, ion beam irradiation presents a promising method to simultaneously optimize surface chemistry of GO and structurally modify WPA. To accomplish this, ion beam irradiation is employed for modification of individual components as well as their nanocomposites with varying mass ratios. Different ion species, fluences and energies were utilized depending on the sample type, ranging from 10 keV C to 710 MeV Bi. Spectroscopy methods were employed to gain insight into the type and degree of structural modification in WPA. A direct correlation is observed between the parameters of the ion beams and the resulting structural changes. As the disordering increases, the structure transitions from partially modified to increased bond breaking, ultimately leading to reconnected bronze-like structures. By increasing the fluence, a gradual modification of the structure and surface chemistry of GO was possible. The effects of irradiation on GO and WPA are particularly pronounced in irradiated composites, where higher capacitance is measured.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade
T1  - Graphene oxide/12 tungstophosphoric acid nanocomposites – achieving favorable properties with ion beams for electrochemical supercapacitors
SP  - 50
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11637
ER  - 

@conference{
author = "Mravik, Željko and Pejčić, Milica and Rmuš Mravik, Jelena and Belec, Blaž and Bajuk-Bogdanović, Danica and Jovanović, Sonja and Marković, Smilja and Gavrilov, Nemanja and Skuratov, Vladimir and Jovanović, Zoran",
year = "2023",
abstract = "In recent years graphene oxide (GO)/12-tungstophosphoric acid (WPA) nanocomposites have demonstrated promising potential for electrochemical supercapacitors. However, to enhance their performance, it is necessary to modify the surface chemistry of GO to minimize the influence of basal plane oxygen groups, which hinder the material's conductivity. Additionally, some degree of structural modification of WPA is desired. In this regard, ion beam irradiation presents a promising method to simultaneously optimize surface chemistry of GO and structurally modify WPA. To accomplish this, ion beam irradiation is employed for modification of individual components as well as their nanocomposites with varying mass ratios. Different ion species, fluences and energies were utilized depending on the sample type, ranging from 10 keV C to 710 MeV Bi. Spectroscopy methods were employed to gain insight into the type and degree of structural modification in WPA. A direct correlation is observed between the parameters of the ion beams and the resulting structural changes. As the disordering increases, the structure transitions from partially modified to increased bond breaking, ultimately leading to reconnected bronze-like structures. By increasing the fluence, a gradual modification of the structure and surface chemistry of GO was possible. The effects of irradiation on GO and WPA are particularly pronounced in irradiated composites, where higher capacitance is measured.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade",
title = "Graphene oxide/12 tungstophosphoric acid nanocomposites – achieving favorable properties with ion beams for electrochemical supercapacitors",
pages = "50",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11637"
}

Mravik, Ž., Pejčić, M., Rmuš Mravik, J., Belec, B., Bajuk-Bogdanović, D., Jovanović, S., Marković, S., Gavrilov, N., Skuratov, V.,& Jovanović, Z.. (2023). Graphene oxide/12 tungstophosphoric acid nanocomposites – achieving favorable properties with ion beams for electrochemical supercapacitors. in Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade
Belgrade : Serbian Ceramic Society., 50.
https://hdl.handle.net/21.15107/rcub_vinar_11637

Mravik Ž, Pejčić M, Rmuš Mravik J, Belec B, Bajuk-Bogdanović D, Jovanović S, Marković S, Gavrilov N, Skuratov V, Jovanović Z. Graphene oxide/12 tungstophosphoric acid nanocomposites – achieving favorable properties with ion beams for electrochemical supercapacitors. in Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade. 2023;:50.
https://hdl.handle.net/21.15107/rcub_vinar_11637 .

Mravik, Željko, Pejčić, Milica, Rmuš Mravik, Jelena, Belec, Blaž, Bajuk-Bogdanović, Danica, Jovanović, Sonja, Marković, Smilja, Gavrilov, Nemanja, Skuratov, Vladimir, Jovanović, Zoran, "Graphene oxide/12 tungstophosphoric acid nanocomposites – achieving favorable properties with ion beams for electrochemical supercapacitors" in Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade (2023):50,
https://hdl.handle.net/21.15107/rcub_vinar_11637 .

TY  - CONF
AU  - Jelić, Marko
AU  - Korneeva, Ekaterina
AU  - Kirilkin, Nikita
AU  - Vershinina, Tatiana
AU  - Orelovich, Oleg
AU  - Skuratov, Vladimir
AU  - Jovanović, Zoran
AU  - Jovanović, Sonja
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11645
AB  - Photoelectrochemical (PEC) cells for solar-energy conversion have received huge interest as a promising technology for renewable energy production. For the efficient application of such cells, it is necessary to develop adequate photoelectrodes. Recently, bismuth vanadate (BiVO4) has emerged as a promising photoanode due to its visible light harvesting properties, band edge positions and low-cost of synthesis. In this study, the effects of N5+ ion irradiation (75keV, 2 × 1014 and 4 × 1014 ions/cm2 ) on physicochemical properties of hydrothermally synthesized BiVO4 thin films were examined. From X-ray diffraction (XRD) study can be concluded that initial monoclinic material didn’t sustain any phase transition after irradiation. Also, preferential orientation remained dominantly along [010] direction with a slightly increasing share of [121] oriented growth, especially after irradiation with 2 × 1014 ions/cm2 . XRD measurements showed shift towards the higher 2θ after irradiation which indicates that interplanar distances decreases. The highest level of crystallinity was observed for the sample irradiated with fluence of 4 × 1014 ions/cm2 . Scanning electron microscopy (SEM) revealed prismatic morphology of all samples with an average grain size of 600 nm without visible traces of irradiation.Raman spectroscopy confirmed presence of bands that correspond to the monoclinic scheelite phase. X-ray photoelectron spectroscopy (XPS) analysis of V 2p confirmed presence of V5+ and V4+ while analysis of O 1s confirmed presence of oxygen in the form of lattice oxygen and in the form of hydroxide. UV-Vis Diffuse Reflectance spectroscopy revealed that calculated band gap decreases with the increase of fluence.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade
T1  - Influence of N5+ ion irradiation on physicochemical properties of bismuth vanadate
SP  - 67
EP  - 68
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11645
ER  - 

@conference{
author = "Jelić, Marko and Korneeva, Ekaterina and Kirilkin, Nikita and Vershinina, Tatiana and Orelovich, Oleg and Skuratov, Vladimir and Jovanović, Zoran and Jovanović, Sonja",
year = "2023",
abstract = "Photoelectrochemical (PEC) cells for solar-energy conversion have received huge interest as a promising technology for renewable energy production. For the efficient application of such cells, it is necessary to develop adequate photoelectrodes. Recently, bismuth vanadate (BiVO4) has emerged as a promising photoanode due to its visible light harvesting properties, band edge positions and low-cost of synthesis. In this study, the effects of N5+ ion irradiation (75keV, 2 × 1014 and 4 × 1014 ions/cm2 ) on physicochemical properties of hydrothermally synthesized BiVO4 thin films were examined. From X-ray diffraction (XRD) study can be concluded that initial monoclinic material didn’t sustain any phase transition after irradiation. Also, preferential orientation remained dominantly along [010] direction with a slightly increasing share of [121] oriented growth, especially after irradiation with 2 × 1014 ions/cm2 . XRD measurements showed shift towards the higher 2θ after irradiation which indicates that interplanar distances decreases. The highest level of crystallinity was observed for the sample irradiated with fluence of 4 × 1014 ions/cm2 . Scanning electron microscopy (SEM) revealed prismatic morphology of all samples with an average grain size of 600 nm without visible traces of irradiation.Raman spectroscopy confirmed presence of bands that correspond to the monoclinic scheelite phase. X-ray photoelectron spectroscopy (XPS) analysis of V 2p confirmed presence of V5+ and V4+ while analysis of O 1s confirmed presence of oxygen in the form of lattice oxygen and in the form of hydroxide. UV-Vis Diffuse Reflectance spectroscopy revealed that calculated band gap decreases with the increase of fluence.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade",
title = "Influence of N5+ ion irradiation on physicochemical properties of bismuth vanadate",
pages = "67-68",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11645"
}

Jelić, M., Korneeva, E., Kirilkin, N., Vershinina, T., Orelovich, O., Skuratov, V., Jovanović, Z.,& Jovanović, S.. (2023). Influence of N5+ ion irradiation on physicochemical properties of bismuth vanadate. in Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade
Belgrade : Serbian Ceramic Society., 67-68.
https://hdl.handle.net/21.15107/rcub_vinar_11645

Jelić M, Korneeva E, Kirilkin N, Vershinina T, Orelovich O, Skuratov V, Jovanović Z, Jovanović S. Influence of N5+ ion irradiation on physicochemical properties of bismuth vanadate. in Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade. 2023;:67-68.
https://hdl.handle.net/21.15107/rcub_vinar_11645 .

Jelić, Marko, Korneeva, Ekaterina, Kirilkin, Nikita, Vershinina, Tatiana, Orelovich, Oleg, Skuratov, Vladimir, Jovanović, Zoran, Jovanović, Sonja, "Influence of N5+ ion irradiation on physicochemical properties of bismuth vanadate" in Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade (2023):67-68,
https://hdl.handle.net/21.15107/rcub_vinar_11645 .

TY  - CONF
AU  - Mravik, Željko
AU  - Pejčić, Milica
AU  - Rmuš Mravik, Jelena
AU  - Belec, Blaž
AU  - Bajuk-Bogdanović, Danica
AU  - Jovanović, Sonja
AU  - Marković, Smilja
AU  - Gavrilov, Nemanja
AU  - Skuratov, Vladimir
AU  - Jovanović, Zoran
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11651
AB  - Ion beam modification of materials is notable method for achieving their unique structural, electronic, and other physicochemical properties. In the case of graphene oxide (GO) such modification of structure and surface chemistry is known to yield properties interesting for electrochemical supercapacitors. The performance of GO supercapacitors can be additionally improved by incorporating components with attractive redox properties. In this work, the influence of ion beam irradiation on synergy of GO and 12-tungstophosphoric acid (WPA) in their nanocomposite was investigated. For that, both components and their composites with different mass ratios were irradiated using different ion species, fluences and energies (from 10 keV C to 710 MeV Bi). For the irradiated WPA, results showed clear correlation between ion beam parameters, degree of structural modification and electrochemical properties. With increasing structural modification, bond breaking is first induced giving higher catalytic activity toward HER. Further irradiation resulted in an increased interconnection of polytungstate species producing lower catalytic activity and lower lithiation capacity. Irradiated GO showed modified surface chemistry, with preferable reduction of alkoxy and epoxy groups, changes in morphology and electric properties due to increased number of defects with increasing fluence, synergic effect of ion beam irradiated GO and WPA resulted in higher capacitance of irradiated composites compared to GO presumably because of interaction of structurally modified WPA with defect sites on GO thus reducing electrolyte flow along ion tracks.
PB  - Belgrade : Materials Research Society of Serbia
C3  - YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro
T1  - Ion-beam irradiated graphene oxide, 12-tungstophosphoric acid and their nanocomposites for electrochemical supercapacitors
SP  - 36
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11651
ER  - 

@conference{
author = "Mravik, Željko and Pejčić, Milica and Rmuš Mravik, Jelena and Belec, Blaž and Bajuk-Bogdanović, Danica and Jovanović, Sonja and Marković, Smilja and Gavrilov, Nemanja and Skuratov, Vladimir and Jovanović, Zoran",
year = "2023",
abstract = "Ion beam modification of materials is notable method for achieving their unique structural, electronic, and other physicochemical properties. In the case of graphene oxide (GO) such modification of structure and surface chemistry is known to yield properties interesting for electrochemical supercapacitors. The performance of GO supercapacitors can be additionally improved by incorporating components with attractive redox properties. In this work, the influence of ion beam irradiation on synergy of GO and 12-tungstophosphoric acid (WPA) in their nanocomposite was investigated. For that, both components and their composites with different mass ratios were irradiated using different ion species, fluences and energies (from 10 keV C to 710 MeV Bi). For the irradiated WPA, results showed clear correlation between ion beam parameters, degree of structural modification and electrochemical properties. With increasing structural modification, bond breaking is first induced giving higher catalytic activity toward HER. Further irradiation resulted in an increased interconnection of polytungstate species producing lower catalytic activity and lower lithiation capacity. Irradiated GO showed modified surface chemistry, with preferable reduction of alkoxy and epoxy groups, changes in morphology and electric properties due to increased number of defects with increasing fluence, synergic effect of ion beam irradiated GO and WPA resulted in higher capacitance of irradiated composites compared to GO presumably because of interaction of structurally modified WPA with defect sites on GO thus reducing electrolyte flow along ion tracks.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro",
title = "Ion-beam irradiated graphene oxide, 12-tungstophosphoric acid and their nanocomposites for electrochemical supercapacitors",
pages = "36",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11651"
}

Mravik, Ž., Pejčić, M., Rmuš Mravik, J., Belec, B., Bajuk-Bogdanović, D., Jovanović, S., Marković, S., Gavrilov, N., Skuratov, V.,& Jovanović, Z.. (2023). Ion-beam irradiated graphene oxide, 12-tungstophosphoric acid and their nanocomposites for electrochemical supercapacitors. in YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro
Belgrade : Materials Research Society of Serbia., 36.
https://hdl.handle.net/21.15107/rcub_vinar_11651

Mravik Ž, Pejčić M, Rmuš Mravik J, Belec B, Bajuk-Bogdanović D, Jovanović S, Marković S, Gavrilov N, Skuratov V, Jovanović Z. Ion-beam irradiated graphene oxide, 12-tungstophosphoric acid and their nanocomposites for electrochemical supercapacitors. in YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro. 2023;:36.
https://hdl.handle.net/21.15107/rcub_vinar_11651 .

Mravik, Željko, Pejčić, Milica, Rmuš Mravik, Jelena, Belec, Blaž, Bajuk-Bogdanović, Danica, Jovanović, Sonja, Marković, Smilja, Gavrilov, Nemanja, Skuratov, Vladimir, Jovanović, Zoran, "Ion-beam irradiated graphene oxide, 12-tungstophosphoric acid and their nanocomposites for electrochemical supercapacitors" in YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro (2023):36,
https://hdl.handle.net/21.15107/rcub_vinar_11651 .

TY  - CONF
AU  - Jelić, Marko
AU  - Korneeva, Ekaterina
AU  - Kirilkin, Nikita
AU  - Vershinina, Tatiana
AU  - Orelovich, Oleg
AU  - Skuratov, Vladimir
AU  - Jovanović, Zoran
AU  - Jovanović, Sonja
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11654
AB  - Monoclinic bismuth vanadate (BiVO4) is considered to be one of the most promising photoanode materials for photoelectrochemical (PEC) water splitting due to its suitable band gap and band structure, good stability and low-cost synthesis. However, BiVO4 has poor charge transfer properties due to the high rate of electron-hole recombination and understanding the effects contributing to it is important for further improvements. Herein, we report the effect of swift heavy ion irradiation (Xe, 150 MeV, 1010 – 5×1011 ions/cm2 ) on physicochemical properties of hydrothermally synthesized BiVO4 thin films. X-ray diffraction study (XRD) showed that irradiated material preserved initial monoclinic scheelite crystal phase and preferential growth along [010] direction. As the fluence increased, a shift of the diffraction maxima towards lower 2θ values was observed indicating increased interplanar distances. Also, for the 5×1011 ions/cm2 irradiated sample, high degree of amorphization was noticed. Scanning electron microscopy (SEM) of all samples showed prismatic grains with an average size of 600 nm. In irradiated samples formation of ion tracks, ~10 nm in diameter, was observed. X-ray photoelectron spectroscopy (XPS) analysis of Bi 4f, V 2p and O 1s states showed that, after irradiation, increased amounts of V4+ and oxygen in the form of hydroxide occurred, especially at higher fluences. By using UV-Vis Diffuse Reflectance spectroscopy we showed that band gap decreased with the increase of fluence. Photocurrent densities obtained from linear sweep voltammetry indicated that irradiation with fluences higher than 1010 ions/cm2 have a notable negative effect on PEC oxygen evolution reaction. However, 1-hour-long chronoamperometry measurements of 1010 ions/cm2 irradiated sample revealed an increase of photocurrent densities. In order to get a better insight into preceding phenomena, we performed XRD, SEM and XPS analysis after PEC process.
PB  - Belgrade : Materials Research Society of Serbia
C3  - YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro
T1  - The effect of swift heavy ion irradiation on physicochemical properties of monoclinic bismuth vanadate
SP  - 95
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11654
ER  - 

@conference{
author = "Jelić, Marko and Korneeva, Ekaterina and Kirilkin, Nikita and Vershinina, Tatiana and Orelovich, Oleg and Skuratov, Vladimir and Jovanović, Zoran and Jovanović, Sonja",
year = "2023",
abstract = "Monoclinic bismuth vanadate (BiVO4) is considered to be one of the most promising photoanode materials for photoelectrochemical (PEC) water splitting due to its suitable band gap and band structure, good stability and low-cost synthesis. However, BiVO4 has poor charge transfer properties due to the high rate of electron-hole recombination and understanding the effects contributing to it is important for further improvements. Herein, we report the effect of swift heavy ion irradiation (Xe, 150 MeV, 1010 – 5×1011 ions/cm2 ) on physicochemical properties of hydrothermally synthesized BiVO4 thin films. X-ray diffraction study (XRD) showed that irradiated material preserved initial monoclinic scheelite crystal phase and preferential growth along [010] direction. As the fluence increased, a shift of the diffraction maxima towards lower 2θ values was observed indicating increased interplanar distances. Also, for the 5×1011 ions/cm2 irradiated sample, high degree of amorphization was noticed. Scanning electron microscopy (SEM) of all samples showed prismatic grains with an average size of 600 nm. In irradiated samples formation of ion tracks, ~10 nm in diameter, was observed. X-ray photoelectron spectroscopy (XPS) analysis of Bi 4f, V 2p and O 1s states showed that, after irradiation, increased amounts of V4+ and oxygen in the form of hydroxide occurred, especially at higher fluences. By using UV-Vis Diffuse Reflectance spectroscopy we showed that band gap decreased with the increase of fluence. Photocurrent densities obtained from linear sweep voltammetry indicated that irradiation with fluences higher than 1010 ions/cm2 have a notable negative effect on PEC oxygen evolution reaction. However, 1-hour-long chronoamperometry measurements of 1010 ions/cm2 irradiated sample revealed an increase of photocurrent densities. In order to get a better insight into preceding phenomena, we performed XRD, SEM and XPS analysis after PEC process.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro",
title = "The effect of swift heavy ion irradiation on physicochemical properties of monoclinic bismuth vanadate",
pages = "95",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11654"
}

Jelić, M., Korneeva, E., Kirilkin, N., Vershinina, T., Orelovich, O., Skuratov, V., Jovanović, Z.,& Jovanović, S.. (2023). The effect of swift heavy ion irradiation on physicochemical properties of monoclinic bismuth vanadate. in YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro
Belgrade : Materials Research Society of Serbia., 95.
https://hdl.handle.net/21.15107/rcub_vinar_11654

Jelić M, Korneeva E, Kirilkin N, Vershinina T, Orelovich O, Skuratov V, Jovanović Z, Jovanović S. The effect of swift heavy ion irradiation on physicochemical properties of monoclinic bismuth vanadate. in YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro. 2023;:95.
https://hdl.handle.net/21.15107/rcub_vinar_11654 .

Jelić, Marko, Korneeva, Ekaterina, Kirilkin, Nikita, Vershinina, Tatiana, Orelovich, Oleg, Skuratov, Vladimir, Jovanović, Zoran, Jovanović, Sonja, "The effect of swift heavy ion irradiation on physicochemical properties of monoclinic bismuth vanadate" in YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro (2023):95,
https://hdl.handle.net/21.15107/rcub_vinar_11654 .

TY  - CONF
AU  - Jovanović, Sonja
AU  - Rmuš Mravik, Jelena
AU  - Grujičić, Marija
AU  - Petković, Darija
AU  - Pejčić, Milica
AU  - Jovanović, Zoran
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11659
AB  - In the past two decades spinel ferrites nanoparticles have been extensively investigated due to their potential applications in a variety of fields (data storage, catalysis, energy, environment, biomedicine, etc.). In the present work, zinc ferrite nanoparticles with different copper content (Zn(1-x)CuxFe2O4; x=0, 0.2, 0.4, 0.6, and 0.8) but with the same particle size distribution and amount of oleic acid as capping agent were prepared by solvothermal synthesis and the physicochemical properties of as-prepared samples were investigated. The prepared samples were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and vibrating sample magnetometry (VSM). The XRD results show that all the diffraction maxima correspond to the cubic spinel structure, while TEM images reviled that samples are consisted of sphere-like particles, 5-7 nm in size. The presence of oleic acid on the surface of nanoparticles was confirmed by FTIR analysis. The magnetic measurements revealed superparamagnetic behavior of obtained powders, with gradual increase of saturation magnetization.
PB  - Belgrade : Materials Research Society of Serbia
C3  - YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro
T1  - Physicochemical properties of solvothermaly synthesized zinc copper ferrite nanoparticles
SP  - 157
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11659
ER  - 

@conference{
author = "Jovanović, Sonja and Rmuš Mravik, Jelena and Grujičić, Marija and Petković, Darija and Pejčić, Milica and Jovanović, Zoran",
year = "2023",
abstract = "In the past two decades spinel ferrites nanoparticles have been extensively investigated due to their potential applications in a variety of fields (data storage, catalysis, energy, environment, biomedicine, etc.). In the present work, zinc ferrite nanoparticles with different copper content (Zn(1-x)CuxFe2O4; x=0, 0.2, 0.4, 0.6, and 0.8) but with the same particle size distribution and amount of oleic acid as capping agent were prepared by solvothermal synthesis and the physicochemical properties of as-prepared samples were investigated. The prepared samples were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and vibrating sample magnetometry (VSM). The XRD results show that all the diffraction maxima correspond to the cubic spinel structure, while TEM images reviled that samples are consisted of sphere-like particles, 5-7 nm in size. The presence of oleic acid on the surface of nanoparticles was confirmed by FTIR analysis. The magnetic measurements revealed superparamagnetic behavior of obtained powders, with gradual increase of saturation magnetization.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro",
title = "Physicochemical properties of solvothermaly synthesized zinc copper ferrite nanoparticles",
pages = "157",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11659"
}

Jovanović, S., Rmuš Mravik, J., Grujičić, M., Petković, D., Pejčić, M.,& Jovanović, Z.. (2023). Physicochemical properties of solvothermaly synthesized zinc copper ferrite nanoparticles. in YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro
Belgrade : Materials Research Society of Serbia., 157.
https://hdl.handle.net/21.15107/rcub_vinar_11659

Jovanović S, Rmuš Mravik J, Grujičić M, Petković D, Pejčić M, Jovanović Z. Physicochemical properties of solvothermaly synthesized zinc copper ferrite nanoparticles. in YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro. 2023;:157.
https://hdl.handle.net/21.15107/rcub_vinar_11659 .

Jovanović, Sonja, Rmuš Mravik, Jelena, Grujičić, Marija, Petković, Darija, Pejčić, Milica, Jovanović, Zoran, "Physicochemical properties of solvothermaly synthesized zinc copper ferrite nanoparticles" in YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro (2023):157,
https://hdl.handle.net/21.15107/rcub_vinar_11659 .

TY  - JOUR
AU  - Anikin, A.A.
AU  - Salnikov, V.
AU  - Pshenichnikov, S.
AU  - Belyaev, V.K.
AU  - Jovanović, Sonja
AU  - Gurevich, A.
AU  - Levada, E.
AU  - Rodionova, V.
AU  - Panina, L.V.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12099
AB  - Nanoparticles represent a class of highly adaptable nanostructures with a remarkable surface-to-volume ratio, allowing for the precise tuning of their shape to influence their properties. Moreover, their surfaces can be functionalized with organic or inorganic materials, thereby tailoring their performance and introducing specific functionalities. Iron oxide nanoparticles including Fe3O4 and spinel Co ferrites emerge as promising candidates for medical applications due to their notable biocompatibility and appropriate magnetic properties. Their potential in cancer therapy primarily hinges on localized cancer cell heating, which can be remotely triggered by an external AC magnetic field (magnetic hyperthermia). Additional heating induced by light excitation can reduce the required particle dosages during such treatments. The optical characteristics of iron oxide nanoparticles within the wavelength range of biological transparency open up exciting prospects for utilizing these structures in adjuvant thermal therapies. In this study, we demonstrate the results of synthesis and study of magnetic and optical properties of iron oxide nanoparticles coated with organic materials. Notably, CoFe2O4 nanoparticles coated with dihydrocaffeic acid demonstrated the coefficient of heat efficiency conversion close to 100 % under 810 nm laser excitation. They also demonstrated the magnetization curves characterized by minimal hysteresis and remanent magnetization typical of superparamagnetic behavior of iron oxide nanoparticles. This suggests their potential for combined magnetic and optical hyperthermia.
T2  - Journal of Magnetism and Magnetic Materials
T1  - Magnetic, optical and photothermal properties of Fe3O4 and CoFe2O4 nanoparticles coated with organic materials
IS  - InPress
SP  - 171507
DO  - 10.1016/j.jmmm.2023.171507
ER  - 

@article{
author = "Anikin, A.A. and Salnikov, V. and Pshenichnikov, S. and Belyaev, V.K. and Jovanović, Sonja and Gurevich, A. and Levada, E. and Rodionova, V. and Panina, L.V.",
year = "2023",
abstract = "Nanoparticles represent a class of highly adaptable nanostructures with a remarkable surface-to-volume ratio, allowing for the precise tuning of their shape to influence their properties. Moreover, their surfaces can be functionalized with organic or inorganic materials, thereby tailoring their performance and introducing specific functionalities. Iron oxide nanoparticles including Fe3O4 and spinel Co ferrites emerge as promising candidates for medical applications due to their notable biocompatibility and appropriate magnetic properties. Their potential in cancer therapy primarily hinges on localized cancer cell heating, which can be remotely triggered by an external AC magnetic field (magnetic hyperthermia). Additional heating induced by light excitation can reduce the required particle dosages during such treatments. The optical characteristics of iron oxide nanoparticles within the wavelength range of biological transparency open up exciting prospects for utilizing these structures in adjuvant thermal therapies. In this study, we demonstrate the results of synthesis and study of magnetic and optical properties of iron oxide nanoparticles coated with organic materials. Notably, CoFe2O4 nanoparticles coated with dihydrocaffeic acid demonstrated the coefficient of heat efficiency conversion close to 100 % under 810 nm laser excitation. They also demonstrated the magnetization curves characterized by minimal hysteresis and remanent magnetization typical of superparamagnetic behavior of iron oxide nanoparticles. This suggests their potential for combined magnetic and optical hyperthermia.",
journal = "Journal of Magnetism and Magnetic Materials",
title = "Magnetic, optical and photothermal properties of Fe3O4 and CoFe2O4 nanoparticles coated with organic materials",
number = "InPress",
pages = "171507",
doi = "10.1016/j.jmmm.2023.171507"
}

Anikin, A.A., Salnikov, V., Pshenichnikov, S., Belyaev, V.K., Jovanović, S., Gurevich, A., Levada, E., Rodionova, V.,& Panina, L.V.. (2023). Magnetic, optical and photothermal properties of Fe3O4 and CoFe2O4 nanoparticles coated with organic materials. in Journal of Magnetism and Magnetic Materials(InPress), 171507.
https://doi.org/10.1016/j.jmmm.2023.171507

Anikin A, Salnikov V, Pshenichnikov S, Belyaev V, Jovanović S, Gurevich A, Levada E, Rodionova V, Panina L. Magnetic, optical and photothermal properties of Fe3O4 and CoFe2O4 nanoparticles coated with organic materials. in Journal of Magnetism and Magnetic Materials. 2023;(InPress):171507.
doi:10.1016/j.jmmm.2023.171507 .

Anikin, A.A., Salnikov, V., Pshenichnikov, S., Belyaev, V.K., Jovanović, Sonja, Gurevich, A., Levada, E., Rodionova, V., Panina, L.V., "Magnetic, optical and photothermal properties of Fe3O4 and CoFe2O4 nanoparticles coated with organic materials" in Journal of Magnetism and Magnetic Materials, no. InPress (2023):171507,
https://doi.org/10.1016/j.jmmm.2023.171507 . .

TY  - CONF
AU  - Pejčić, Milica
AU  - Mravik, Željko
AU  - Bajuk-Bogdanović, Danica
AU  - Grujičić, Marija
AU  - Rmuš Mravik, Jelena
AU  - Jovanović, Sonja
AU  - Jovanović, Zoran
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12316
AB  - Different hierarchical ordering of nanomaterials, either as individual components or in the form of nanocomposites, is one of the approaches used for the development of supercapacitors. In this work, the effect of hydrothermal treatment on oxygen functional groups of nanocomposites between graphene oxide (GO), 12-tungstophosphoric acid (WPA), and 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) was examined. The mentioned materials were hydrothermally treated for 4, 8 and 12 hours at 180 °C in order to understand how interaction between the components is influencing development of surface chemistry. The results of Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy (Raman), and temperature-programmed desorption (TPD) are showing the surface and structural changes of GO (individually and in nanocomposite) as a result of hydrothermal treatment. Both FTIR and RAMAN confirm the presence of WPA and PTCDA. Additionally, it appears that hydrothermal treatment has no impact on the structural changes in PTCDA, which is consistent across various temperature conditions. TPD results indicate that prolonged hydrothermal treatment leads to a gradual increase of the number of functional groups of GO. However, the number of desorbed groups is influenced by the WPA and PTDCA components. This research offers new insights into GO, WPA, and PTCDA interactions which can have useful implications for development of electrochemical supercapacitors.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
T1  - Investigating the influence of hydrothermal treatment on oxygen functional groups in graphene oxide-based nanocomposites
SP  - 43
EP  - 43
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12316
ER  - 

@conference{
author = "Pejčić, Milica and Mravik, Željko and Bajuk-Bogdanović, Danica and Grujičić, Marija and Rmuš Mravik, Jelena and Jovanović, Sonja and Jovanović, Zoran",
year = "2023",
abstract = "Different hierarchical ordering of nanomaterials, either as individual components or in the form of nanocomposites, is one of the approaches used for the development of supercapacitors. In this work, the effect of hydrothermal treatment on oxygen functional groups of nanocomposites between graphene oxide (GO), 12-tungstophosphoric acid (WPA), and 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) was examined. The mentioned materials were hydrothermally treated for 4, 8 and 12 hours at 180 °C in order to understand how interaction between the components is influencing development of surface chemistry. The results of Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy (Raman), and temperature-programmed desorption (TPD) are showing the surface and structural changes of GO (individually and in nanocomposite) as a result of hydrothermal treatment. Both FTIR and RAMAN confirm the presence of WPA and PTCDA. Additionally, it appears that hydrothermal treatment has no impact on the structural changes in PTCDA, which is consistent across various temperature conditions. TPD results indicate that prolonged hydrothermal treatment leads to a gradual increase of the number of functional groups of GO. However, the number of desorbed groups is influenced by the WPA and PTDCA components. This research offers new insights into GO, WPA, and PTCDA interactions which can have useful implications for development of electrochemical supercapacitors.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts",
title = "Investigating the influence of hydrothermal treatment on oxygen functional groups in graphene oxide-based nanocomposites",
pages = "43-43",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12316"
}

Pejčić, M., Mravik, Ž., Bajuk-Bogdanović, D., Grujičić, M., Rmuš Mravik, J., Jovanović, S.,& Jovanović, Z.. (2023). Investigating the influence of hydrothermal treatment on oxygen functional groups in graphene oxide-based nanocomposites. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
Belgrade : Institute of Technical Sciences of SASA., 43-43.
https://hdl.handle.net/21.15107/rcub_vinar_12316

Pejčić M, Mravik Ž, Bajuk-Bogdanović D, Grujičić M, Rmuš Mravik J, Jovanović S, Jovanović Z. Investigating the influence of hydrothermal treatment on oxygen functional groups in graphene oxide-based nanocomposites. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts. 2023;:43-43.
https://hdl.handle.net/21.15107/rcub_vinar_12316 .

Pejčić, Milica, Mravik, Željko, Bajuk-Bogdanović, Danica, Grujičić, Marija, Rmuš Mravik, Jelena, Jovanović, Sonja, Jovanović, Zoran, "Investigating the influence of hydrothermal treatment on oxygen functional groups in graphene oxide-based nanocomposites" in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts (2023):43-43,
https://hdl.handle.net/21.15107/rcub_vinar_12316 .

TY  - CONF
AU  - Jelić, Marko
AU  - Korneeva, Ekaterina
AU  - Kirilkin, Nikita
AU  - Vershinina, Tatiana
AU  - Orelovich, Oleg
AU  - Skuratov, Vladimir
AU  - Jovanović, Zoran
AU  - Jovanović, Sonja
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12324
AB  - Photoelectrochemical (PEC) water splitting is a promising route for solar energy harvesting and storage. The most challenging obstacle for efficient water splitting is development of catalysts for oxygen evolution reaction (OER). Monoclinic bismuth vanadate (BiVO4, BVO) stands out as an excellent photoanode material due to its high stability in near-neutral electrolytes, suitable band structure and low-cost synthesis. However, pronounced charge recombination is a huge limiting factor and understanding the effects contributing to it is important for further improvements. In present study, we report the effect of swift heavy ion (SHI) irradiation (Xe, 150 MeV, 1 × 1010 – 5 × 1011 ions cm-2 ) on physicochemical properties of hydrothermally synthesized BVO thin films. X-ray diffraction (XRD) study showed that irradiated material preserved initial monoclinic scheelite phase and preferential growth along [010] direction together with the presence of notable amorphization at the highest fluence. Scanning electron microscopy (SEM) of all samples showed prismatic grains with an average size of 600 nm with the appearance of ion tracks after irradiation. More detailed examination of 1 × 1010 ions cm-2 irradiated sample by transmission electron microscopy (TEM) revealed presence of amorphous ion tracks (~ 10 nm in diameter) and hillocks at the BVO surface (~ 10 nm in height). Raman spectra showed bands that correspond to the monoclinic scheelite phase as well as the presence of new bands for 5 × 1011 ion cm-2 irradiated sample at 420 and 915 cm-1 that originate from complex vanadium oxides. X-ray photoelectron spectroscopy (XPS) after SHI irradiation showed an increase of V4+ states and oxygen vacancies, especially at higher fluences. Diffuse reflectance spectroscopy (DRS) measurements showed decrease of band gap with the increase of fluence. Photocurrent densities, obtained from 1-hour-long chronoamperometry measurements, showed that irradiation with 1 × 1010 ions cm-2 fluence leads to gradual recovery of PEC oxygen evolution with time. XRD, SEM and XPS measurements performed after PEC reveal complex changes in the BVO, including dissolution of the material along ion tracks.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
T1  - Photoelectrochemical water oxidation properties of bismuth vanadate photoanode irradiated by swift heavy ions
SP  - 53
EP  - 53
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12324
ER  - 

@conference{
author = "Jelić, Marko and Korneeva, Ekaterina and Kirilkin, Nikita and Vershinina, Tatiana and Orelovich, Oleg and Skuratov, Vladimir and Jovanović, Zoran and Jovanović, Sonja",
year = "2023",
abstract = "Photoelectrochemical (PEC) water splitting is a promising route for solar energy harvesting and storage. The most challenging obstacle for efficient water splitting is development of catalysts for oxygen evolution reaction (OER). Monoclinic bismuth vanadate (BiVO4, BVO) stands out as an excellent photoanode material due to its high stability in near-neutral electrolytes, suitable band structure and low-cost synthesis. However, pronounced charge recombination is a huge limiting factor and understanding the effects contributing to it is important for further improvements. In present study, we report the effect of swift heavy ion (SHI) irradiation (Xe, 150 MeV, 1 × 1010 – 5 × 1011 ions cm-2 ) on physicochemical properties of hydrothermally synthesized BVO thin films. X-ray diffraction (XRD) study showed that irradiated material preserved initial monoclinic scheelite phase and preferential growth along [010] direction together with the presence of notable amorphization at the highest fluence. Scanning electron microscopy (SEM) of all samples showed prismatic grains with an average size of 600 nm with the appearance of ion tracks after irradiation. More detailed examination of 1 × 1010 ions cm-2 irradiated sample by transmission electron microscopy (TEM) revealed presence of amorphous ion tracks (~ 10 nm in diameter) and hillocks at the BVO surface (~ 10 nm in height). Raman spectra showed bands that correspond to the monoclinic scheelite phase as well as the presence of new bands for 5 × 1011 ion cm-2 irradiated sample at 420 and 915 cm-1 that originate from complex vanadium oxides. X-ray photoelectron spectroscopy (XPS) after SHI irradiation showed an increase of V4+ states and oxygen vacancies, especially at higher fluences. Diffuse reflectance spectroscopy (DRS) measurements showed decrease of band gap with the increase of fluence. Photocurrent densities, obtained from 1-hour-long chronoamperometry measurements, showed that irradiation with 1 × 1010 ions cm-2 fluence leads to gradual recovery of PEC oxygen evolution with time. XRD, SEM and XPS measurements performed after PEC reveal complex changes in the BVO, including dissolution of the material along ion tracks.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts",
title = "Photoelectrochemical water oxidation properties of bismuth vanadate photoanode irradiated by swift heavy ions",
pages = "53-53",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12324"
}

Jelić, M., Korneeva, E., Kirilkin, N., Vershinina, T., Orelovich, O., Skuratov, V., Jovanović, Z.,& Jovanović, S.. (2023). Photoelectrochemical water oxidation properties of bismuth vanadate photoanode irradiated by swift heavy ions. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
Belgrade : Institute of Technical Sciences of SASA., 53-53.
https://hdl.handle.net/21.15107/rcub_vinar_12324

Jelić M, Korneeva E, Kirilkin N, Vershinina T, Orelovich O, Skuratov V, Jovanović Z, Jovanović S. Photoelectrochemical water oxidation properties of bismuth vanadate photoanode irradiated by swift heavy ions. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts. 2023;:53-53.
https://hdl.handle.net/21.15107/rcub_vinar_12324 .

Jelić, Marko, Korneeva, Ekaterina, Kirilkin, Nikita, Vershinina, Tatiana, Orelovich, Oleg, Skuratov, Vladimir, Jovanović, Zoran, Jovanović, Sonja, "Photoelectrochemical water oxidation properties of bismuth vanadate photoanode irradiated by swift heavy ions" in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts (2023):53-53,
https://hdl.handle.net/21.15107/rcub_vinar_12324 .

TY  - CONF
AU  - Jovanović, Zoran
AU  - Jovanović, Sonja
AU  - Mravik, Željko
AU  - Rmuš, Jelena
AU  - Jelić, Marko
AU  - Pejčić, Milica
AU  - Grujičić, Marija
AU  - Petković, Darija
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12334
AB  - Elektrohemijska istraživanja su prethodnih godina dala ključni podstrek globalnim stremljenjima ka obnovljivim izvorima energije. Višegeneracijski napori, u početku motivisani željom za fundamentalnim razumevanjem procesa, aktuelizovani su očekivanim nedostatkom fosilnih goriva i pratećim nepovoljnim uticajem na životnu sredinu. Nanomaterijali su omogućili spektakularan skok u tehnološkim inovacijama i neosporan je njihov doprinos obnovljivim izvorima energije. Zahvaljujući novim svojstvima nanomaterijala i njihovoj sinergiji, omogućeno je dalje unapređenje i integracija različitih funkcionalnosti. Pri tome, postalo je jasno da atomski precizan dizajn materijala postaje kritičan za razvoj naprava sledeće generacije. Ovo je posebno važno u slučaju nanokompozita gde interakcija komponenti pojačava moguće sinergijske doprinose. U izlaganju će biti dat osvrt na napredne metode sinteze i modifikacije materijala – od tradicionalnih, do tankih filmova, 0D i 2D nanomaterijala i njihovih kompozita – posmatranih kroz prizmu obnovljivih izvora energije i održivosti (elektrohemijski superkondenzatori, razgradnja vode, senzori, i dr.). Razvoj novih materijala i unapređenje elektrohemijskih sistema ima potencijal da suštinski učini obnovljivu energiju održivijom i dostupnijom, time otvarajući put ka održivoj budućnosti.
C3  - Savremena stremljenja u elektrohemiji u proceu prelaska na obnovljive izvore energije: Naučni skup posvećen 100 - godišnjici rođenja inostranog člana SANU Dž. O'M. Bokrisa : Knjiga izvoda
T1  - Sinteza i modifikacija naprednih nanomaterijala - pogled kroz prizmu obnovljivih izvora energije
SP  - 19
EP  - 19
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12334
ER  - 

@conference{
author = "Jovanović, Zoran and Jovanović, Sonja and Mravik, Željko and Rmuš, Jelena and Jelić, Marko and Pejčić, Milica and Grujičić, Marija and Petković, Darija",
year = "2023",
abstract = "Elektrohemijska istraživanja su prethodnih godina dala ključni podstrek globalnim stremljenjima ka obnovljivim izvorima energije. Višegeneracijski napori, u početku motivisani željom za fundamentalnim razumevanjem procesa, aktuelizovani su očekivanim nedostatkom fosilnih goriva i pratećim nepovoljnim uticajem na životnu sredinu. Nanomaterijali su omogućili spektakularan skok u tehnološkim inovacijama i neosporan je njihov doprinos obnovljivim izvorima energije. Zahvaljujući novim svojstvima nanomaterijala i njihovoj sinergiji, omogućeno je dalje unapređenje i integracija različitih funkcionalnosti. Pri tome, postalo je jasno da atomski precizan dizajn materijala postaje kritičan za razvoj naprava sledeće generacije. Ovo je posebno važno u slučaju nanokompozita gde interakcija komponenti pojačava moguće sinergijske doprinose. U izlaganju će biti dat osvrt na napredne metode sinteze i modifikacije materijala – od tradicionalnih, do tankih filmova, 0D i 2D nanomaterijala i njihovih kompozita – posmatranih kroz prizmu obnovljivih izvora energije i održivosti (elektrohemijski superkondenzatori, razgradnja vode, senzori, i dr.). Razvoj novih materijala i unapređenje elektrohemijskih sistema ima potencijal da suštinski učini obnovljivu energiju održivijom i dostupnijom, time otvarajući put ka održivoj budućnosti.",
journal = "Savremena stremljenja u elektrohemiji u proceu prelaska na obnovljive izvore energije: Naučni skup posvećen 100 - godišnjici rođenja inostranog člana SANU Dž. O'M. Bokrisa : Knjiga izvoda",
title = "Sinteza i modifikacija naprednih nanomaterijala - pogled kroz prizmu obnovljivih izvora energije",
pages = "19-19",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12334"
}

Jovanović, Z., Jovanović, S., Mravik, Ž., Rmuš, J., Jelić, M., Pejčić, M., Grujičić, M.,& Petković, D.. (2023). Sinteza i modifikacija naprednih nanomaterijala - pogled kroz prizmu obnovljivih izvora energije. in Savremena stremljenja u elektrohemiji u proceu prelaska na obnovljive izvore energije: Naučni skup posvećen 100 - godišnjici rođenja inostranog člana SANU Dž. O'M. Bokrisa : Knjiga izvoda, 19-19.
https://hdl.handle.net/21.15107/rcub_vinar_12334

Jovanović Z, Jovanović S, Mravik Ž, Rmuš J, Jelić M, Pejčić M, Grujičić M, Petković D. Sinteza i modifikacija naprednih nanomaterijala - pogled kroz prizmu obnovljivih izvora energije. in Savremena stremljenja u elektrohemiji u proceu prelaska na obnovljive izvore energije: Naučni skup posvećen 100 - godišnjici rođenja inostranog člana SANU Dž. O'M. Bokrisa : Knjiga izvoda. 2023;:19-19.
https://hdl.handle.net/21.15107/rcub_vinar_12334 .

Jovanović, Zoran, Jovanović, Sonja, Mravik, Željko, Rmuš, Jelena, Jelić, Marko, Pejčić, Milica, Grujičić, Marija, Petković, Darija, "Sinteza i modifikacija naprednih nanomaterijala - pogled kroz prizmu obnovljivih izvora energije" in Savremena stremljenja u elektrohemiji u proceu prelaska na obnovljive izvore energije: Naučni skup posvećen 100 - godišnjici rođenja inostranog člana SANU Dž. O'M. Bokrisa : Knjiga izvoda (2023):19-19,
https://hdl.handle.net/21.15107/rcub_vinar_12334 .

TY  - CONF
AU  - Jelić, Marko
AU  - Korneeva, Ekaterina
AU  - Kirilkin, Nikita
AU  - Vershinina, Tatiana
AU  - Orelovich, Oleg
AU  - Skuratov, Vladimir
AU  - Jovanović, Zoran
AU  - Jovanović, Sonja
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12433
PB  - Russia, Dubna : Joint Institute for Nuclear Research
C3  - AYSS-2023 : The XXVII International Scientific Conference of Young Scientists and Specialists
T1  - The impact of swift heavy ion irradiation on bismuth vanadate photoanode for photoelectrochemical water oxidation
SP  - 1238
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12433
ER  - 

@conference{
author = "Jelić, Marko and Korneeva, Ekaterina and Kirilkin, Nikita and Vershinina, Tatiana and Orelovich, Oleg and Skuratov, Vladimir and Jovanović, Zoran and Jovanović, Sonja",
year = "2023",
publisher = "Russia, Dubna : Joint Institute for Nuclear Research",
journal = "AYSS-2023 : The XXVII International Scientific Conference of Young Scientists and Specialists",
title = "The impact of swift heavy ion irradiation on bismuth vanadate photoanode for photoelectrochemical water oxidation",
pages = "1238",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12433"
}

Jelić, M., Korneeva, E., Kirilkin, N., Vershinina, T., Orelovich, O., Skuratov, V., Jovanović, Z.,& Jovanović, S.. (2023). The impact of swift heavy ion irradiation on bismuth vanadate photoanode for photoelectrochemical water oxidation. in AYSS-2023 : The XXVII International Scientific Conference of Young Scientists and Specialists
Russia, Dubna : Joint Institute for Nuclear Research., 1238.
https://hdl.handle.net/21.15107/rcub_vinar_12433

Jelić M, Korneeva E, Kirilkin N, Vershinina T, Orelovich O, Skuratov V, Jovanović Z, Jovanović S. The impact of swift heavy ion irradiation on bismuth vanadate photoanode for photoelectrochemical water oxidation. in AYSS-2023 : The XXVII International Scientific Conference of Young Scientists and Specialists. 2023;:1238.
https://hdl.handle.net/21.15107/rcub_vinar_12433 .

Jelić, Marko, Korneeva, Ekaterina, Kirilkin, Nikita, Vershinina, Tatiana, Orelovich, Oleg, Skuratov, Vladimir, Jovanović, Zoran, Jovanović, Sonja, "The impact of swift heavy ion irradiation on bismuth vanadate photoanode for photoelectrochemical water oxidation" in AYSS-2023 : The XXVII International Scientific Conference of Young Scientists and Specialists (2023):1238,
https://hdl.handle.net/21.15107/rcub_vinar_12433 .

TY  - JOUR
AU  - Jovanović, Zoran
AU  - Gloginjić, Marko
AU  - Mravik, Željko
AU  - Olejniczak, Andrzej
AU  - Bajuk-Bogdanović, Danica V.
AU  - Jovanović, Sonja
AU  - Pašti, Igor A.
AU  - Skuratov, Vladimir A.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10345
AB  - Interest in graphene oxide (GO) due to its controllable and adjustable properties has been increasing, especially in the field of electronic and electrochemical charge storage devices. Hence, the modification of surface chemistry and structure of GO can be outlined as crucial for achieving the preferable properties. In this study, we have investigated the influence of 15 keV proton-beam irradiation on GO structure and surface chemistry. The results obtained by Raman spectroscopy, Fourier-transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) were complemented with theoretical ones, obtained by using density functional theory (DFT), semi-empirical (SE) calculations and inelastic thermal spike (iTS) model. The FTIR and XPS results showed that proton irradiation partially reduces the GO with the preferential removal of the alkoxy and epoxy groups. Also, we identified a clear linear relation between the decresase of oxygen content and the decrease of ID/IG ratio i.e. increasing disorder of GO structure. The SE and DFT calculations highlighted a reduction of GO as a single- or multi-step process depending on the type of basal-plane or edge oxygen group. Dynamic SE calculations revealed that for kinetic energy of hydrogen below 1.5 eV the reduction is chemically driven, while at energies higher than 20 eV, the reduction of GO is a result of physical processes. iTS results showed that increase of temperature might contribute to reduction of GO via desorption of epoxy and alcoxy groups, as the least thermally stable groups (T ∼200 °C). The results of this work emphasize the capabilities ion beam irradiation for gradual modification of surface chemistry and structural properties of GO by providing more information about the mechanisms of hydrogen interaction with individual groups, interplay between defect creation, oxygen content and accompaning effects of ion energy loss processes.
T2  - Radiation Physics and Chemistry
T1  - Mechanistic insights into ion-beam induced reduction of graphene oxide: An experimental and theoretical study
VL  - 199
SP  - 110355
DO  - 10.1016/j.radphyschem.2022.110355
ER  - 

@article{
author = "Jovanović, Zoran and Gloginjić, Marko and Mravik, Željko and Olejniczak, Andrzej and Bajuk-Bogdanović, Danica V. and Jovanović, Sonja and Pašti, Igor A. and Skuratov, Vladimir A.",
year = "2022",
abstract = "Interest in graphene oxide (GO) due to its controllable and adjustable properties has been increasing, especially in the field of electronic and electrochemical charge storage devices. Hence, the modification of surface chemistry and structure of GO can be outlined as crucial for achieving the preferable properties. In this study, we have investigated the influence of 15 keV proton-beam irradiation on GO structure and surface chemistry. The results obtained by Raman spectroscopy, Fourier-transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) were complemented with theoretical ones, obtained by using density functional theory (DFT), semi-empirical (SE) calculations and inelastic thermal spike (iTS) model. The FTIR and XPS results showed that proton irradiation partially reduces the GO with the preferential removal of the alkoxy and epoxy groups. Also, we identified a clear linear relation between the decresase of oxygen content and the decrease of ID/IG ratio i.e. increasing disorder of GO structure. The SE and DFT calculations highlighted a reduction of GO as a single- or multi-step process depending on the type of basal-plane or edge oxygen group. Dynamic SE calculations revealed that for kinetic energy of hydrogen below 1.5 eV the reduction is chemically driven, while at energies higher than 20 eV, the reduction of GO is a result of physical processes. iTS results showed that increase of temperature might contribute to reduction of GO via desorption of epoxy and alcoxy groups, as the least thermally stable groups (T ∼200 °C). The results of this work emphasize the capabilities ion beam irradiation for gradual modification of surface chemistry and structural properties of GO by providing more information about the mechanisms of hydrogen interaction with individual groups, interplay between defect creation, oxygen content and accompaning effects of ion energy loss processes.",
journal = "Radiation Physics and Chemistry",
title = "Mechanistic insights into ion-beam induced reduction of graphene oxide: An experimental and theoretical study",
volume = "199",
pages = "110355",
doi = "10.1016/j.radphyschem.2022.110355"
}

Jovanović, Z., Gloginjić, M., Mravik, Ž., Olejniczak, A., Bajuk-Bogdanović, D. V., Jovanović, S., Pašti, I. A.,& Skuratov, V. A.. (2022). Mechanistic insights into ion-beam induced reduction of graphene oxide: An experimental and theoretical study. in Radiation Physics and Chemistry, 199, 110355.
https://doi.org/10.1016/j.radphyschem.2022.110355

Jovanović Z, Gloginjić M, Mravik Ž, Olejniczak A, Bajuk-Bogdanović DV, Jovanović S, Pašti IA, Skuratov VA. Mechanistic insights into ion-beam induced reduction of graphene oxide: An experimental and theoretical study. in Radiation Physics and Chemistry. 2022;199:110355.
doi:10.1016/j.radphyschem.2022.110355 .

Jovanović, Zoran, Gloginjić, Marko, Mravik, Željko, Olejniczak, Andrzej, Bajuk-Bogdanović, Danica V., Jovanović, Sonja, Pašti, Igor A., Skuratov, Vladimir A., "Mechanistic insights into ion-beam induced reduction of graphene oxide: An experimental and theoretical study" in Radiation Physics and Chemistry, 199 (2022):110355,
https://doi.org/10.1016/j.radphyschem.2022.110355 . .

TY  - CONF
AU  - Jelić, Marko
AU  - Pašti, Igor
AU  - Nedić Vasiljević, Bojana
AU  - Erčić, Jelena
AU  - Bajuk-Bogdanović, Danica
AU  - Jovanović, Zoran
AU  - Jovanović, Sonja
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12427
AB  - Environmentaly friendly photoelectrochemical (PEC) materals are in the center of the research
interest for sustainable solar-to-chemical energy conversion. Lately, bismuth vanadate (BiVO4)
has attracted attention due to its visible light harvesting properties, band edge positions and lowcost synthesis method. However, BiVO4 has poor charge transfer properties due to the high rate
of electron-hole recombination. It has been shown that metal doping efficiently boosts charge
separation and hence increases PEC water splitting activity. Herein, we report physicochemical
properties of hydrothermaly sinthesized 1%-, 2.5%- and 5%- Cu-doped BiVO4 powders for 8 h
and 20 h. X-ray diffraction (XRD) study indicates that, depending on the degree of doping and
synthesis time, material exists in monoclinic or tetragonal scheelite phase, but mixed phase
composition was also possible. Monoclinic phase was formed in a case of pristine samples
(synthesized for 8 h and 20 h) and 1% and 2.5% doped samples synthesized for 8 h. Tetragonal
phase was observed in case of 5% and 1% doped samples synthesized for 8 h and 20 h,
respectively. In the samples synthesized for 20 h and doped with 2.5% and 5% mixed phase was
noticed. Scanning electron microscopy (SEM) reveals that samples with monoclinic phase
consists of combination of worm-like and prismatic structures while tetragonal samples showed
spherical shape. In case of samples with mixed phase a combination of prismatic and spherical
shape was observed. Local structure was examined with Raman and Fourier Transformed Infrared
(FTIR) spectroscopy. Optical properties were characterized with UV-Vis Diffuse Reflectance
Spectroscopy (DRS) and Photoluminescence (PL) spectroscopy. Monoclinic phase has band gap
in range 2.35 – 2.52 eV while samples with tetragonal phase has band gap in range 2.8 – 3 eV.
Based on the results it can be concluded that band gap is dependent on the phase composition of
samples. PL results indicate that monoclinic samples possess better recombination features than
tetragonal ones. Preliminary measurements confirmed considerable higher PEC activity of lightirradiated samples.
PB  - Belgrade : Materials Research Society of Serbia – MRS-Serbia
C3  - 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts
T1  - Physicochemical properties of copper-doped bismuth vanadate nanoparticles
VL  - XLV
SP  - 132
EP  - 132
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12427
ER  - 

@conference{
author = "Jelić, Marko and Pašti, Igor and Nedić Vasiljević, Bojana and Erčić, Jelena and Bajuk-Bogdanović, Danica and Jovanović, Zoran and Jovanović, Sonja",
year = "2022",
abstract = "Environmentaly friendly photoelectrochemical (PEC) materals are in the center of the research
interest for sustainable solar-to-chemical energy conversion. Lately, bismuth vanadate (BiVO4)
has attracted attention due to its visible light harvesting properties, band edge positions and lowcost synthesis method. However, BiVO4 has poor charge transfer properties due to the high rate
of electron-hole recombination. It has been shown that metal doping efficiently boosts charge
separation and hence increases PEC water splitting activity. Herein, we report physicochemical
properties of hydrothermaly sinthesized 1%-, 2.5%- and 5%- Cu-doped BiVO4 powders for 8 h
and 20 h. X-ray diffraction (XRD) study indicates that, depending on the degree of doping and
synthesis time, material exists in monoclinic or tetragonal scheelite phase, but mixed phase
composition was also possible. Monoclinic phase was formed in a case of pristine samples
(synthesized for 8 h and 20 h) and 1% and 2.5% doped samples synthesized for 8 h. Tetragonal
phase was observed in case of 5% and 1% doped samples synthesized for 8 h and 20 h,
respectively. In the samples synthesized for 20 h and doped with 2.5% and 5% mixed phase was
noticed. Scanning electron microscopy (SEM) reveals that samples with monoclinic phase
consists of combination of worm-like and prismatic structures while tetragonal samples showed
spherical shape. In case of samples with mixed phase a combination of prismatic and spherical
shape was observed. Local structure was examined with Raman and Fourier Transformed Infrared
(FTIR) spectroscopy. Optical properties were characterized with UV-Vis Diffuse Reflectance
Spectroscopy (DRS) and Photoluminescence (PL) spectroscopy. Monoclinic phase has band gap
in range 2.35 – 2.52 eV while samples with tetragonal phase has band gap in range 2.8 – 3 eV.
Based on the results it can be concluded that band gap is dependent on the phase composition of
samples. PL results indicate that monoclinic samples possess better recombination features than
tetragonal ones. Preliminary measurements confirmed considerable higher PEC activity of lightirradiated samples.",
publisher = "Belgrade : Materials Research Society of Serbia – MRS-Serbia",
journal = "23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts",
title = "Physicochemical properties of copper-doped bismuth vanadate nanoparticles",
volume = "XLV",
pages = "132-132",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12427"
}

Jelić, M., Pašti, I., Nedić Vasiljević, B., Erčić, J., Bajuk-Bogdanović, D., Jovanović, Z.,& Jovanović, S.. (2022). Physicochemical properties of copper-doped bismuth vanadate nanoparticles. in 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts
Belgrade : Materials Research Society of Serbia – MRS-Serbia., XLV, 132-132.
https://hdl.handle.net/21.15107/rcub_vinar_12427

Jelić M, Pašti I, Nedić Vasiljević B, Erčić J, Bajuk-Bogdanović D, Jovanović Z, Jovanović S. Physicochemical properties of copper-doped bismuth vanadate nanoparticles. in 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts. 2022;XLV:132-132.
https://hdl.handle.net/21.15107/rcub_vinar_12427 .

Jelić, Marko, Pašti, Igor, Nedić Vasiljević, Bojana, Erčić, Jelena, Bajuk-Bogdanović, Danica, Jovanović, Zoran, Jovanović, Sonja, "Physicochemical properties of copper-doped bismuth vanadate nanoparticles" in 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts, XLV (2022):132-132,
https://hdl.handle.net/21.15107/rcub_vinar_12427 .

TY  - CONF
AU  - Jelić, Marko
AU  - Pašti, Igor
AU  - Nedić Vasiljević, Bojana
AU  - Erčić, Jelena
AU  - Bajuk-Bogdanović, Danica
AU  - Jovanović, Zoran
AU  - Jovanović, Sonja
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12428
PB  - Russia, Dubna : Joint Institute for Nuclear Research
C3  - AYSS-2022 : The XXVI International Scientific Conference of Young Scientists and Specialists
T1  - The effect of Cu doping on physicochemical properties of bismuth vanadate
SP  - 1132
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12428
ER  - 

@conference{
author = "Jelić, Marko and Pašti, Igor and Nedić Vasiljević, Bojana and Erčić, Jelena and Bajuk-Bogdanović, Danica and Jovanović, Zoran and Jovanović, Sonja",
year = "2022",
publisher = "Russia, Dubna : Joint Institute for Nuclear Research",
journal = "AYSS-2022 : The XXVI International Scientific Conference of Young Scientists and Specialists",
title = "The effect of Cu doping on physicochemical properties of bismuth vanadate",
pages = "1132",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12428"
}

Jelić, M., Pašti, I., Nedić Vasiljević, B., Erčić, J., Bajuk-Bogdanović, D., Jovanović, Z.,& Jovanović, S.. (2022). The effect of Cu doping on physicochemical properties of bismuth vanadate. in AYSS-2022 : The XXVI International Scientific Conference of Young Scientists and Specialists
Russia, Dubna : Joint Institute for Nuclear Research., 1132.
https://hdl.handle.net/21.15107/rcub_vinar_12428

Jelić M, Pašti I, Nedić Vasiljević B, Erčić J, Bajuk-Bogdanović D, Jovanović Z, Jovanović S. The effect of Cu doping on physicochemical properties of bismuth vanadate. in AYSS-2022 : The XXVI International Scientific Conference of Young Scientists and Specialists. 2022;:1132.
https://hdl.handle.net/21.15107/rcub_vinar_12428 .

Jelić, Marko, Pašti, Igor, Nedić Vasiljević, Bojana, Erčić, Jelena, Bajuk-Bogdanović, Danica, Jovanović, Zoran, Jovanović, Sonja, "The effect of Cu doping on physicochemical properties of bismuth vanadate" in AYSS-2022 : The XXVI International Scientific Conference of Young Scientists and Specialists (2022):1132,
https://hdl.handle.net/21.15107/rcub_vinar_12428 .

TY  - CONF
AU  - Jelić, Marko
AU  - Pašti, Igor
AU  - Nedić Vasiljević, Bojana
AU  - Erčić, Jelena
AU  - Bajuk-Bogdanović, Danica
AU  - Jovanović, Zoran
AU  - Jovanović, Sonja
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12430
AB  - Production of gasses such as hydrogen and oxygen on a large scale is of the great importance both in industry and in environmental protection. To achieve it, photoelectrochemical (PEC) water splitting has been regarded as promising method and the developement of new semiconductors holds a key role to the efficent application. Due to its great light harvesting ability, band edge positions and low-cost synthesis method, bismuth vanadate (BiVO4; BVO) has been intensively studied as a photoanode material for water splitting. To overcome limitations such as charge carriers recombination, material should be doped with different transition metal elements. In this work physicochemical properties of pristine and 1%-, 2.5%- and 5%- Cu-doped BVO powders, solvothermaly synthesized at 180°C for 20 h, were reported. X-ray diffraction (XRD) study indicates that, depending on the doping level, the material exists in monoclinic or tetragonal scheelite phase, but mixed phase composition was also observed. Pure monoclinic and tetragonal phase was formed in a case of pristine and 1% doped sample, respectively, while 2.5%- and 5%- Cu-doped BVO exhibit presence of both phases. Scanning electron microscopy (SEM) reveals that sample with monoclinic phase consists of irregular worm-like morphology, while morphology of tetragonal samples was mostly spherical. For 2.5%- and 5%- Cu-doped samples a combination of prismatic and spherical shape morphology was observed. Local structure of material was examined with Raman spectroscopy and the results were in accordance with XRD study where band positions well matched the phase composition. Optical properties were characterized with UV-Vis Diffuse Reflectance Spectroscopy (DRS) and Photoluminescence (PL) spectroscopy. The band gap of monoclinic samples was in range 2.4-2.5 eV, while band gap of sample with tetragonal phase has band gap was between 2.8 and 3 eV. Dual phase samples had two different band gaps that originate from presence of both phases. Based on the results obtained from the PL spectra, monoclinic samples possess better recombination features than tetragonal ones. Photoelectrochemical measurements of BVO samples imply that doping of material improves performance towards oxygen evolution reaction.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - 20th Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
T1  - The role of copper doping on physicochemical properties of bismuth vanadate
SP  - 30
EP  - 30
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12430
ER  - 

@conference{
author = "Jelić, Marko and Pašti, Igor and Nedić Vasiljević, Bojana and Erčić, Jelena and Bajuk-Bogdanović, Danica and Jovanović, Zoran and Jovanović, Sonja",
year = "2022",
abstract = "Production of gasses such as hydrogen and oxygen on a large scale is of the great importance both in industry and in environmental protection. To achieve it, photoelectrochemical (PEC) water splitting has been regarded as promising method and the developement of new semiconductors holds a key role to the efficent application. Due to its great light harvesting ability, band edge positions and low-cost synthesis method, bismuth vanadate (BiVO4; BVO) has been intensively studied as a photoanode material for water splitting. To overcome limitations such as charge carriers recombination, material should be doped with different transition metal elements. In this work physicochemical properties of pristine and 1%-, 2.5%- and 5%- Cu-doped BVO powders, solvothermaly synthesized at 180°C for 20 h, were reported. X-ray diffraction (XRD) study indicates that, depending on the doping level, the material exists in monoclinic or tetragonal scheelite phase, but mixed phase composition was also observed. Pure monoclinic and tetragonal phase was formed in a case of pristine and 1% doped sample, respectively, while 2.5%- and 5%- Cu-doped BVO exhibit presence of both phases. Scanning electron microscopy (SEM) reveals that sample with monoclinic phase consists of irregular worm-like morphology, while morphology of tetragonal samples was mostly spherical. For 2.5%- and 5%- Cu-doped samples a combination of prismatic and spherical shape morphology was observed. Local structure of material was examined with Raman spectroscopy and the results were in accordance with XRD study where band positions well matched the phase composition. Optical properties were characterized with UV-Vis Diffuse Reflectance Spectroscopy (DRS) and Photoluminescence (PL) spectroscopy. The band gap of monoclinic samples was in range 2.4-2.5 eV, while band gap of sample with tetragonal phase has band gap was between 2.8 and 3 eV. Dual phase samples had two different band gaps that originate from presence of both phases. Based on the results obtained from the PL spectra, monoclinic samples possess better recombination features than tetragonal ones. Photoelectrochemical measurements of BVO samples imply that doping of material improves performance towards oxygen evolution reaction.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "20th Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts",
title = "The role of copper doping on physicochemical properties of bismuth vanadate",
pages = "30-30",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12430"
}

Jelić, M., Pašti, I., Nedić Vasiljević, B., Erčić, J., Bajuk-Bogdanović, D., Jovanović, Z.,& Jovanović, S.. (2022). The role of copper doping on physicochemical properties of bismuth vanadate. in 20th Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
Belgrade : Institute of Technical Sciences of SASA., 30-30.
https://hdl.handle.net/21.15107/rcub_vinar_12430

Jelić M, Pašti I, Nedić Vasiljević B, Erčić J, Bajuk-Bogdanović D, Jovanović Z, Jovanović S. The role of copper doping on physicochemical properties of bismuth vanadate. in 20th Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts. 2022;:30-30.
https://hdl.handle.net/21.15107/rcub_vinar_12430 .

Jelić, Marko, Pašti, Igor, Nedić Vasiljević, Bojana, Erčić, Jelena, Bajuk-Bogdanović, Danica, Jovanović, Zoran, Jovanović, Sonja, "The role of copper doping on physicochemical properties of bismuth vanadate" in 20th Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts (2022):30-30,
https://hdl.handle.net/21.15107/rcub_vinar_12430 .

TY  - CONF
AU  - Jovanović, Zoran
AU  - Bajuk-Bogdanović, Danica
AU  - Vujković, Milica
AU  - Mravik, Željko
AU  - Jovanović, Sonja
AU  - Marković, Smilja
AU  - Pejčić, Milica
AU  - Holclajtner Antunović, Ivanka
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12783
AB  - Gaining a momentum from newly emerging properties of nanomaterials the further enhancement and integration of various functionalities have been made possible. Also, it became apparent that interaction between nano-objects can provide additional synergy capable of yielding new or significantly improved properties. This particularly applies to the surfaces and interfaces of nanomaterials where the intimate contact between components amplifies possible contributions of interfacial interactions. Since this aspect of interaction-property relation in many nanocomposites is still insufficiently explored, it is of interest to identify to what extent the properties emerge as a result of interaction-based synergy or a co-action of individual components. To address these aspects, we have investigated a nanocomposite of graphene oxide (GO) and 12-tungstophosporic acid (WPA) – a combination of materials that are known for the rich “portfolio” of properties. In the talk the novel findings will be presented that contribute to better the understanding of interactions between nano-objects and how they contribute to novel properties. The results are showing how simple temperature treatment and weight ratio of components is influencing the evolution of surface, structural properties and charge storage properties – all closely connected to interactions between components. Finally, the implications on synthetic approaches and fine-tuning of the functionality of GO/WPA nanocomposites will be discussed from the perspective of the obtained results.
PB  - Belgrade : University of Belgrade, Faculty of Physical Chemistry
C3  - COIN2022 : Contemporary batteries and supercapacitors : Program and book of abstracts
T1  - The Role of Surface Chemistry, Structure and Interactions in the Electrochemical Charge Storage Properties of Graphene Oxide and 12-tungstophoshoric Acid Nanocomposites
SP  - 16
EP  - 16
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12783
ER  - 

@conference{
author = "Jovanović, Zoran and Bajuk-Bogdanović, Danica and Vujković, Milica and Mravik, Željko and Jovanović, Sonja and Marković, Smilja and Pejčić, Milica and Holclajtner Antunović, Ivanka",
year = "2022",
abstract = "Gaining a momentum from newly emerging properties of nanomaterials the further enhancement and integration of various functionalities have been made possible. Also, it became apparent that interaction between nano-objects can provide additional synergy capable of yielding new or significantly improved properties. This particularly applies to the surfaces and interfaces of nanomaterials where the intimate contact between components amplifies possible contributions of interfacial interactions. Since this aspect of interaction-property relation in many nanocomposites is still insufficiently explored, it is of interest to identify to what extent the properties emerge as a result of interaction-based synergy or a co-action of individual components. To address these aspects, we have investigated a nanocomposite of graphene oxide (GO) and 12-tungstophosporic acid (WPA) – a combination of materials that are known for the rich “portfolio” of properties. In the talk the novel findings will be presented that contribute to better the understanding of interactions between nano-objects and how they contribute to novel properties. The results are showing how simple temperature treatment and weight ratio of components is influencing the evolution of surface, structural properties and charge storage properties – all closely connected to interactions between components. Finally, the implications on synthetic approaches and fine-tuning of the functionality of GO/WPA nanocomposites will be discussed from the perspective of the obtained results.",
publisher = "Belgrade : University of Belgrade, Faculty of Physical Chemistry",
journal = "COIN2022 : Contemporary batteries and supercapacitors : Program and book of abstracts",
title = "The Role of Surface Chemistry, Structure and Interactions in the Electrochemical Charge Storage Properties of Graphene Oxide and 12-tungstophoshoric Acid Nanocomposites",
pages = "16-16",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12783"
}

Jovanović, Z., Bajuk-Bogdanović, D., Vujković, M., Mravik, Ž., Jovanović, S., Marković, S., Pejčić, M.,& Holclajtner Antunović, I.. (2022). The Role of Surface Chemistry, Structure and Interactions in the Electrochemical Charge Storage Properties of Graphene Oxide and 12-tungstophoshoric Acid Nanocomposites. in COIN2022 : Contemporary batteries and supercapacitors : Program and book of abstracts
Belgrade : University of Belgrade, Faculty of Physical Chemistry., 16-16.
https://hdl.handle.net/21.15107/rcub_vinar_12783

Jovanović Z, Bajuk-Bogdanović D, Vujković M, Mravik Ž, Jovanović S, Marković S, Pejčić M, Holclajtner Antunović I. The Role of Surface Chemistry, Structure and Interactions in the Electrochemical Charge Storage Properties of Graphene Oxide and 12-tungstophoshoric Acid Nanocomposites. in COIN2022 : Contemporary batteries and supercapacitors : Program and book of abstracts. 2022;:16-16.
https://hdl.handle.net/21.15107/rcub_vinar_12783 .

Jovanović, Zoran, Bajuk-Bogdanović, Danica, Vujković, Milica, Mravik, Željko, Jovanović, Sonja, Marković, Smilja, Pejčić, Milica, Holclajtner Antunović, Ivanka, "The Role of Surface Chemistry, Structure and Interactions in the Electrochemical Charge Storage Properties of Graphene Oxide and 12-tungstophoshoric Acid Nanocomposites" in COIN2022 : Contemporary batteries and supercapacitors : Program and book of abstracts (2022):16-16,
https://hdl.handle.net/21.15107/rcub_vinar_12783 .

TY  - JOUR
AU  - Grujičić, Marija
AU  - Mravik, Željko
AU  - Bajuk-Bogdanović, Danica
AU  - Vengust, Damjan
AU  - Jovanović, Zoran M.
AU  - Stojković Simatović, Ivana
AU  - Jovanović, Sonja
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12756
AB  - U ovom radu prikazana su elektrohemijska svojstva kompozita grafen-oksida i nanočestica kobalt-ferita, kao i kobalt-ferita dopiranog sa cinkom i galijumom. Grafen-oksid (GO) sintetisan je modifikovanom Hamerovom metodom. Magnetne nanočestice sintetisane su solvotermalnom metodom, nakon čega je izvršena izmena oleinske kiseline dihidrokofeinskom kiselinom sa ciljem dobijanja hidrofilnog materijala. Kompoziti grafen-oksida i magnetnih nanočestica sintetisani su hidrotermalnom metodom, prilikom čega je udeo magnetnih čestica bio 5 i 15 težinskih % u odnosu na grafen-oksid. Rezultati rendgeno-strukturne i FTIR analize potvrdili su potpunu oksidaciju grafenskih slojeva. SEM i TEM analize pokazale su depoziciju magnetnih nanočestica na sloju grafen-oksida, bez promene veličine ili oblika nanočestica. FTIR analiza hidrotemalno tretiranog grafen-oksida i kompozita pokazala je da dolazi do delimične redukcije epoksi grupa, kao i da se uspostavlja vodonična veza između komponenti kompozita. Ciklovoltamogrami pokazuju da su kompoziti stabilni pri brzinama polarizacije od 5 do 400 mV s-1, kao i da je njihov kapacitet pretežno pseudokapacitivne prirode. Pseudokapacitivnost potiče od oksidoredukcionih reakcija H+ jona iz elektrolita i površinskih funkcionalnih grupa grafen oksida. Na osnovu ciklovoltamograma izračunati su specifični kapaciteti svih kompozita, pri čemu je najveću vrednost pokazao kompozit CFO_GO_15% koja iznosi 36,86 F g-1 pri brzini polarizacije od 5 mV s-1.
AB  - This paper presents the electrochemical properties of graphene-oxide composites and nanoparticles of cobalt-ferrite, as well as cobalt-ferrite doped with zinc and gallium. Graphene-oxide (GO) was synthesized by a modified Hummer's method. The magnetic nanoparticles were synthesized by the solvothermal method, after which the oleic acid was exchanged with dihydrocaffeic acid to obtain the hydrophilic material. Composites of graphene-oxide and magnetic nanoparticles were synthesized by the hydrothermal method, where the share of magnetic particles was 5 and 15 wt.% on graphene-oxide. The results of X-ray structural and FTIR analysis confirmed the complete oxidation of graphene layers. SEM and TEM analyzes showed deposition of magnetic nanoparticles on the graphene-oxide layer, without changing the size or shape of the nanoparticles. FTIR analysis of hydrothermally treated graphene oxide and composites showed that there is a partial reduction of epoxy groups, also a hydrogen bond is established between the components of the composite. Cyclic voltammograms show that the composites are stable at polarization rates of 5-400 mV s-1, and that their capacity is predominantly pseudocapacitive in nature. Pseudocapacitance originates from the oxidoreduction reactions of H+ ions from electrolytes and surface functional groups of graphene-oxide. Based on the cyclic voltammograms, the specific capacities of all composites were calculated and the highest value being shown by the CFO_GO_15% composite, which is 36.86 F g-1 at a polarization rate of 5 mV s-1.
T2  - Tehnika
T1  - Elektrohemijska svojstva kompozita grafen-oksida i kobalt-ferita dopiranog cinkom i galijumom
T1  - Electrochemical properties of composites of graphene-oxide and cobalt-ferrite doped with zink and gallium
VL  - 77
IS  - 2
SP  - 155
EP  - 162
DO  - 10.5937/tehnika2202155G
ER  - 

@article{
author = "Grujičić, Marija and Mravik, Željko and Bajuk-Bogdanović, Danica and Vengust, Damjan and Jovanović, Zoran M. and Stojković Simatović, Ivana and Jovanović, Sonja",
year = "2022",
abstract = "U ovom radu prikazana su elektrohemijska svojstva kompozita grafen-oksida i nanočestica kobalt-ferita, kao i kobalt-ferita dopiranog sa cinkom i galijumom. Grafen-oksid (GO) sintetisan je modifikovanom Hamerovom metodom. Magnetne nanočestice sintetisane su solvotermalnom metodom, nakon čega je izvršena izmena oleinske kiseline dihidrokofeinskom kiselinom sa ciljem dobijanja hidrofilnog materijala. Kompoziti grafen-oksida i magnetnih nanočestica sintetisani su hidrotermalnom metodom, prilikom čega je udeo magnetnih čestica bio 5 i 15 težinskih % u odnosu na grafen-oksid. Rezultati rendgeno-strukturne i FTIR analize potvrdili su potpunu oksidaciju grafenskih slojeva. SEM i TEM analize pokazale su depoziciju magnetnih nanočestica na sloju grafen-oksida, bez promene veličine ili oblika nanočestica. FTIR analiza hidrotemalno tretiranog grafen-oksida i kompozita pokazala je da dolazi do delimične redukcije epoksi grupa, kao i da se uspostavlja vodonična veza između komponenti kompozita. Ciklovoltamogrami pokazuju da su kompoziti stabilni pri brzinama polarizacije od 5 do 400 mV s-1, kao i da je njihov kapacitet pretežno pseudokapacitivne prirode. Pseudokapacitivnost potiče od oksidoredukcionih reakcija H+ jona iz elektrolita i površinskih funkcionalnih grupa grafen oksida. Na osnovu ciklovoltamograma izračunati su specifični kapaciteti svih kompozita, pri čemu je najveću vrednost pokazao kompozit CFO_GO_15% koja iznosi 36,86 F g-1 pri brzini polarizacije od 5 mV s-1., This paper presents the electrochemical properties of graphene-oxide composites and nanoparticles of cobalt-ferrite, as well as cobalt-ferrite doped with zinc and gallium. Graphene-oxide (GO) was synthesized by a modified Hummer's method. The magnetic nanoparticles were synthesized by the solvothermal method, after which the oleic acid was exchanged with dihydrocaffeic acid to obtain the hydrophilic material. Composites of graphene-oxide and magnetic nanoparticles were synthesized by the hydrothermal method, where the share of magnetic particles was 5 and 15 wt.% on graphene-oxide. The results of X-ray structural and FTIR analysis confirmed the complete oxidation of graphene layers. SEM and TEM analyzes showed deposition of magnetic nanoparticles on the graphene-oxide layer, without changing the size or shape of the nanoparticles. FTIR analysis of hydrothermally treated graphene oxide and composites showed that there is a partial reduction of epoxy groups, also a hydrogen bond is established between the components of the composite. Cyclic voltammograms show that the composites are stable at polarization rates of 5-400 mV s-1, and that their capacity is predominantly pseudocapacitive in nature. Pseudocapacitance originates from the oxidoreduction reactions of H+ ions from electrolytes and surface functional groups of graphene-oxide. Based on the cyclic voltammograms, the specific capacities of all composites were calculated and the highest value being shown by the CFO_GO_15% composite, which is 36.86 F g-1 at a polarization rate of 5 mV s-1.",
journal = "Tehnika",
title = "Elektrohemijska svojstva kompozita grafen-oksida i kobalt-ferita dopiranog cinkom i galijumom, Electrochemical properties of composites of graphene-oxide and cobalt-ferrite doped with zink and gallium",
volume = "77",
number = "2",
pages = "155-162",
doi = "10.5937/tehnika2202155G"
}

Grujičić, M., Mravik, Ž., Bajuk-Bogdanović, D., Vengust, D., Jovanović, Z. M., Stojković Simatović, I.,& Jovanović, S.. (2022). Elektrohemijska svojstva kompozita grafen-oksida i kobalt-ferita dopiranog cinkom i galijumom. in Tehnika, 77(2), 155-162.
https://doi.org/10.5937/tehnika2202155G

Grujičić M, Mravik Ž, Bajuk-Bogdanović D, Vengust D, Jovanović ZM, Stojković Simatović I, Jovanović S. Elektrohemijska svojstva kompozita grafen-oksida i kobalt-ferita dopiranog cinkom i galijumom. in Tehnika. 2022;77(2):155-162.
doi:10.5937/tehnika2202155G .

Grujičić, Marija, Mravik, Željko, Bajuk-Bogdanović, Danica, Vengust, Damjan, Jovanović, Zoran M., Stojković Simatović, Ivana, Jovanović, Sonja, "Elektrohemijska svojstva kompozita grafen-oksida i kobalt-ferita dopiranog cinkom i galijumom" in Tehnika, 77, no. 2 (2022):155-162,
https://doi.org/10.5937/tehnika2202155G . .

TY  - CONF
AU  - Grujičić, Marija
AU  - Mravik, Željko
AU  - Bajuk-Bogdanović, Danica
AU  - Vengust, Damjan
AU  - Jovanović, Zoran
AU  - Stojković Simatović, Ivana
AU  - Jovanović, Sonja
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12757
AB  - The possibility of surface functionalization and formation of stable aqueous suspensions make graphene oxide (GO) suitable as base for composite materials, especially with nanoparticles. Cobalt ferrite (CFO) has attracted attention due to its unique properties such as large magnetic anisotropy, high coercivity, moderate saturation magnetization, excellent chemical stability, mechanical hardness, etc. This study presents the electrochemical properties of GO and CFO composites, as well as CFO doped with zinc (CFO_Zn) and gallium (CFO_Ga). Magnetic nanoparticles were synthesized using the solvothermal method, after which the oleic acid was exchanged with dihydrocaffeic acid to obtain the hydrophilic material. GO was synthesized using a modified Hummer's method. Composites of GO and magnetic nanoparticles were synthesized by the hydrothermal method (T = 120 °C, t = 3 h), with nominal fractions of 5 and 15 wt.% of magnetic nanoparticles. X-ray structural diffraction, as well as FTIR analysis, confirmed the complete oxidation of graphene layers. SEM and TEM images showed deposition of magnetic nanoparticles on GO layer with the different distribution density between 5 wt.% and 15 wt.% composites. Also, shape and size of magnetic nanoparticles remained unchanged. Based on FTIR analysis of hydrothermally treated GO and composites a partial reduction of epoxy groups was found along with hydrogen bond established between the components of the composite. The electrochemical charge storage of composites is mainly of pseudocapacitive nature, which originates from the oxidoreduction reactions of H+ ions from electrolytes and surface functional groups of GO. The best electrochemical properties, in terms of the highest specific capacity, were shown by the composite which contains 15 wt.% CFO, which value is 36.86 F g-1 at a polarization rate of 5 mV s-1
PB  - Belgrade : Materials Research Society of Serbia – MRS-Serbia
C3  - 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts
T1  - Electrochemical properties of composites of graphene oxide and cobalt ferrite doped with zink and gallium
VL  - XLV
SP  - 135
EP  - 135
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12757
ER  - 

@conference{
author = "Grujičić, Marija and Mravik, Željko and Bajuk-Bogdanović, Danica and Vengust, Damjan and Jovanović, Zoran and Stojković Simatović, Ivana and Jovanović, Sonja",
year = "2022",
abstract = "The possibility of surface functionalization and formation of stable aqueous suspensions make graphene oxide (GO) suitable as base for composite materials, especially with nanoparticles. Cobalt ferrite (CFO) has attracted attention due to its unique properties such as large magnetic anisotropy, high coercivity, moderate saturation magnetization, excellent chemical stability, mechanical hardness, etc. This study presents the electrochemical properties of GO and CFO composites, as well as CFO doped with zinc (CFO_Zn) and gallium (CFO_Ga). Magnetic nanoparticles were synthesized using the solvothermal method, after which the oleic acid was exchanged with dihydrocaffeic acid to obtain the hydrophilic material. GO was synthesized using a modified Hummer's method. Composites of GO and magnetic nanoparticles were synthesized by the hydrothermal method (T = 120 °C, t = 3 h), with nominal fractions of 5 and 15 wt.% of magnetic nanoparticles. X-ray structural diffraction, as well as FTIR analysis, confirmed the complete oxidation of graphene layers. SEM and TEM images showed deposition of magnetic nanoparticles on GO layer with the different distribution density between 5 wt.% and 15 wt.% composites. Also, shape and size of magnetic nanoparticles remained unchanged. Based on FTIR analysis of hydrothermally treated GO and composites a partial reduction of epoxy groups was found along with hydrogen bond established between the components of the composite. The electrochemical charge storage of composites is mainly of pseudocapacitive nature, which originates from the oxidoreduction reactions of H+ ions from electrolytes and surface functional groups of GO. The best electrochemical properties, in terms of the highest specific capacity, were shown by the composite which contains 15 wt.% CFO, which value is 36.86 F g-1 at a polarization rate of 5 mV s-1",
publisher = "Belgrade : Materials Research Society of Serbia – MRS-Serbia",
journal = "23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts",
title = "Electrochemical properties of composites of graphene oxide and cobalt ferrite doped with zink and gallium",
volume = "XLV",
pages = "135-135",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12757"
}

Grujičić, M., Mravik, Ž., Bajuk-Bogdanović, D., Vengust, D., Jovanović, Z., Stojković Simatović, I.,& Jovanović, S.. (2022). Electrochemical properties of composites of graphene oxide and cobalt ferrite doped with zink and gallium. in 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts
Belgrade : Materials Research Society of Serbia – MRS-Serbia., XLV, 135-135.
https://hdl.handle.net/21.15107/rcub_vinar_12757

Grujičić M, Mravik Ž, Bajuk-Bogdanović D, Vengust D, Jovanović Z, Stojković Simatović I, Jovanović S. Electrochemical properties of composites of graphene oxide and cobalt ferrite doped with zink and gallium. in 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts. 2022;XLV:135-135.
https://hdl.handle.net/21.15107/rcub_vinar_12757 .

Grujičić, Marija, Mravik, Željko, Bajuk-Bogdanović, Danica, Vengust, Damjan, Jovanović, Zoran, Stojković Simatović, Ivana, Jovanović, Sonja, "Electrochemical properties of composites of graphene oxide and cobalt ferrite doped with zink and gallium" in 23rd annual conference - YUCOMAT 2022 & 12th World Round Table Conference on Sintering - WRTCS 2022 : Program and Book of Abstracts, XLV (2022):135-135,
https://hdl.handle.net/21.15107/rcub_vinar_12757 .

TY  - JOUR
AU  - Mravik, Željko
AU  - Bajuk-Bogdanović, Danica V.
AU  - Jovanović, Sonja
AU  - Rmuš, Jelena
AU  - Olejniczak, Andrzej
AU  - Mraković, Ana Đ.
AU  - Lazarević, Jasmina
AU  - Uskoković-Marković, Snežana
AU  - Lazarević, Nenad
AU  - Skuratov, Vladimir A.
AU  - Jovanović, Zoran
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10376
AB  - Ion beam irradiation is a versatile tool for structural modification andengineering of new materials. In this study, 12-tungstophosphoric acid (WPA)films of different thickness were spin-coated on platinized silicon substrate andirradiated with low energy hydrogen ions (10 keV) and swift heavy ions (Bi,Xe, and V) with energies up to 710 MeV. The different energy/fluence combi-nations allowed controllable structural changes that were investigated in detailusing Raman and Infrared spectroscopy. For 120-nm-thick WPA samples, theirradiation led to the decrease of intensity of the skeletal and W-Oc-W bands ofKeggin anion in order: Bi < V < Xe (for their applied energy/fluence combina-tion). Also, symmetry change of Keggin anion similar to the one observed inthe case of Keggin anions interacting with the supports was observed. For theselected ion beam irradiation parameters, xenon ion beam induced transforma-tion of WPA to polytungstate. For 20-μm-thick WPA samples, the irradiationwith hydrogen ion beam induced changes of skeletal vibrations and increasedindividualistic behavior of Keggin anions. As the fluence increased, theamount of the Keggin anions partially transformed to bronze also increased.Irradiation with vanadium also caused transformation to bronze-like structurebut with higher ratio of terminal W=Odbonds. The overall results show clearReceived: 9 February 2022Revised: 17 June 2022Accepted: 5 July 2022DOI: 10.1002/jrs.6423J Raman Spectrosc.2022;1–11.wileyonlinelibrary.com/journal/jrs© 2022 John Wiley & Sons Ltd.1correlation between degree of structural modification of WPA and thecalculated displacement per atom value. These results open possibilities forengineering new catalytically active structures of polyoxometalates with thehelp of ion beams.
T2  - Journal of Raman Spectroscopy
T1  - Modification of Keggin anion structure with ion beams—A new spectroscopic insights into the effects of keV- and MeV-ion beam irradiation on 12-tungstophosphoric acid
DO  - 10.1002/jrs.6423
ER  - 

@article{
author = "Mravik, Željko and Bajuk-Bogdanović, Danica V. and Jovanović, Sonja and Rmuš, Jelena and Olejniczak, Andrzej and Mraković, Ana Đ. and Lazarević, Jasmina and Uskoković-Marković, Snežana and Lazarević, Nenad and Skuratov, Vladimir A. and Jovanović, Zoran",
year = "2022",
abstract = "Ion beam irradiation is a versatile tool for structural modification andengineering of new materials. In this study, 12-tungstophosphoric acid (WPA)films of different thickness were spin-coated on platinized silicon substrate andirradiated with low energy hydrogen ions (10 keV) and swift heavy ions (Bi,Xe, and V) with energies up to 710 MeV. The different energy/fluence combi-nations allowed controllable structural changes that were investigated in detailusing Raman and Infrared spectroscopy. For 120-nm-thick WPA samples, theirradiation led to the decrease of intensity of the skeletal and W-Oc-W bands ofKeggin anion in order: Bi < V < Xe (for their applied energy/fluence combina-tion). Also, symmetry change of Keggin anion similar to the one observed inthe case of Keggin anions interacting with the supports was observed. For theselected ion beam irradiation parameters, xenon ion beam induced transforma-tion of WPA to polytungstate. For 20-μm-thick WPA samples, the irradiationwith hydrogen ion beam induced changes of skeletal vibrations and increasedindividualistic behavior of Keggin anions. As the fluence increased, theamount of the Keggin anions partially transformed to bronze also increased.Irradiation with vanadium also caused transformation to bronze-like structurebut with higher ratio of terminal W=Odbonds. The overall results show clearReceived: 9 February 2022Revised: 17 June 2022Accepted: 5 July 2022DOI: 10.1002/jrs.6423J Raman Spectrosc.2022;1–11.wileyonlinelibrary.com/journal/jrs© 2022 John Wiley & Sons Ltd.1correlation between degree of structural modification of WPA and thecalculated displacement per atom value. These results open possibilities forengineering new catalytically active structures of polyoxometalates with thehelp of ion beams.",
journal = "Journal of Raman Spectroscopy",
title = "Modification of Keggin anion structure with ion beams—A new spectroscopic insights into the effects of keV- and MeV-ion beam irradiation on 12-tungstophosphoric acid",
doi = "10.1002/jrs.6423"
}

Mravik, Ž., Bajuk-Bogdanović, D. V., Jovanović, S., Rmuš, J., Olejniczak, A., Mraković, A. Đ., Lazarević, J., Uskoković-Marković, S., Lazarević, N., Skuratov, V. A.,& Jovanović, Z.. (2022). Modification of Keggin anion structure with ion beams—A new spectroscopic insights into the effects of keV- and MeV-ion beam irradiation on 12-tungstophosphoric acid. in Journal of Raman Spectroscopy.
https://doi.org/10.1002/jrs.6423

Mravik Ž, Bajuk-Bogdanović DV, Jovanović S, Rmuš J, Olejniczak A, Mraković AĐ, Lazarević J, Uskoković-Marković S, Lazarević N, Skuratov VA, Jovanović Z. Modification of Keggin anion structure with ion beams—A new spectroscopic insights into the effects of keV- and MeV-ion beam irradiation on 12-tungstophosphoric acid. in Journal of Raman Spectroscopy. 2022;.
doi:10.1002/jrs.6423 .

Mravik, Željko, Bajuk-Bogdanović, Danica V., Jovanović, Sonja, Rmuš, Jelena, Olejniczak, Andrzej, Mraković, Ana Đ., Lazarević, Jasmina, Uskoković-Marković, Snežana, Lazarević, Nenad, Skuratov, Vladimir A., Jovanović, Zoran, "Modification of Keggin anion structure with ion beams—A new spectroscopic insights into the effects of keV- and MeV-ion beam irradiation on 12-tungstophosphoric acid" in Journal of Raman Spectroscopy (2022),
https://doi.org/10.1002/jrs.6423 . .

TY  - JOUR
AU  - Motorzhina, Anna V.
AU  - Belyaev, Victor
AU  - Kolesnikova, Valeria
AU  - Jovanović, Sonja
AU  - Panina, Larissa V.
AU  - Levada, Kateryna
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10408
AB  - The rapid development of the nanomaterials’ application’s fields in biomedicine is associated with the expanded possibilities of combining their properties in composite materials. The use of nanocomposites allows application in various types of therapy or theranostics. In this work, we propose a new approach for the fabrication of a gold/ferrite nanocomposite, which consists of gold particles up to 10 nm in diameter surrounded by small nanoparticles of cobalt ferrite (~5 nm) doped with zinc. The gold core is coated with arginine, while the ferrite particles have dihydrocaffeic acid shell. The fabricated nanocomposite possesses optical and magnetic properties due to the excitation of localized plasmon resonance in gold particles and the superparamagnetic state of ferrite particles. The results of studying the structural, magnetic, and optical properties, as well as the cytotoxicity of the obtained nanocomposite, allow us to conclude that it can be used in combined photo- and magnetic hyperthermic therapy.
T2  - Nanobiotechnology Reports
T1  - Zinc-Doped Gold/Cobalt Ferrite Nanoparticles in Studying the Cytotoxic Effect on T-Lymphoblastic Leukemia Cells
VL  - 17
IS  - 3
SP  - 436
EP  - 443
DO  - 10.1134/S2635167622030120
DO  - 10.1134/S2635167622030120
ER  - 

@article{
author = "Motorzhina, Anna V. and Belyaev, Victor and Kolesnikova, Valeria and Jovanović, Sonja and Panina, Larissa V. and Levada, Kateryna",
year = "2022",
abstract = "The rapid development of the nanomaterials’ application’s fields in biomedicine is associated with the expanded possibilities of combining their properties in composite materials. The use of nanocomposites allows application in various types of therapy or theranostics. In this work, we propose a new approach for the fabrication of a gold/ferrite nanocomposite, which consists of gold particles up to 10 nm in diameter surrounded by small nanoparticles of cobalt ferrite (~5 nm) doped with zinc. The gold core is coated with arginine, while the ferrite particles have dihydrocaffeic acid shell. The fabricated nanocomposite possesses optical and magnetic properties due to the excitation of localized plasmon resonance in gold particles and the superparamagnetic state of ferrite particles. The results of studying the structural, magnetic, and optical properties, as well as the cytotoxicity of the obtained nanocomposite, allow us to conclude that it can be used in combined photo- and magnetic hyperthermic therapy.",
journal = "Nanobiotechnology Reports",
title = "Zinc-Doped Gold/Cobalt Ferrite Nanoparticles in Studying the Cytotoxic Effect on T-Lymphoblastic Leukemia Cells",
volume = "17",
number = "3",
pages = "436-443",
doi = "10.1134/S2635167622030120, 10.1134/S2635167622030120"
}

Motorzhina, A. V., Belyaev, V., Kolesnikova, V., Jovanović, S., Panina, L. V.,& Levada, K.. (2022). Zinc-Doped Gold/Cobalt Ferrite Nanoparticles in Studying the Cytotoxic Effect on T-Lymphoblastic Leukemia Cells. in Nanobiotechnology Reports, 17(3), 436-443.
https://doi.org/10.1134/S2635167622030120

Motorzhina AV, Belyaev V, Kolesnikova V, Jovanović S, Panina LV, Levada K. Zinc-Doped Gold/Cobalt Ferrite Nanoparticles in Studying the Cytotoxic Effect on T-Lymphoblastic Leukemia Cells. in Nanobiotechnology Reports. 2022;17(3):436-443.
doi:10.1134/S2635167622030120 .

Motorzhina, Anna V., Belyaev, Victor, Kolesnikova, Valeria, Jovanović, Sonja, Panina, Larissa V., Levada, Kateryna, "Zinc-Doped Gold/Cobalt Ferrite Nanoparticles in Studying the Cytotoxic Effect on T-Lymphoblastic Leukemia Cells" in Nanobiotechnology Reports, 17, no. 3 (2022):436-443,
https://doi.org/10.1134/S2635167622030120 . .

TY  - JOUR
AU  - Kamanina, N V
AU  - Toikka, A S
AU  - Barnash, Ya. V.
AU  - Redka, D N
AU  - Lihkomanova, S V
AU  - Zybtsova, Yu. A.
AU  - Kyzhakov, P V
AU  - Jovanović, Zoran M.
AU  - Jovanović, Sonja
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10643
AB  - The first experimental results on the functioning of liquid crystal cells doped with CoFe2O4 nanoparticles are presented. Transmission spectra in the visible and near-infrared range, dynamic parameters of the Fredericks effect, refractive characteristics, as well as wetting angles of the mesophase sensitized surfaces have been obtained. The measured surfaces were the K8 Crown glass, the conductive ITO and the ITO treated with a surface electromagnetic wave. The experiment was performed in order to establish the prospect of using such reliefs as a novel liquid crystal composite orientator sensitized with CoFe2O4 nanoparticles. A color change of the liquid crystal matrix, its refractive coefficients alterations, and the variation of inclination angle of the sensitized liquid crystal droplets on the considered reliefs were established. The time reaction parameters and the medium relaxation parameters were measured. It was proposed that the liquid crystal composition is a kind of an immersion medium that preserves properties of the introduced nanoparticles, which expands their application scope in optoelectronics and biomedicine.
AB  - В работе представлены результаты первых экспериментов по функционированию жидкокристаллических ячеек с введенными в мезофазу наночастицами CoFe2O4. Измерены спектры пропускания в видимом и ближнем ИК-диапазоне, динамические параметры по эффекту Фредерикса, рефрактивные характеристики, а также углы смачивания сенсибилизированной мезофазой поверхностей на основе стекла: Крон К8, проводящего покрытия ITO и ITO, обработанного поверхностной электромагнитной волной, – для перспективы использования такового рельефа в качестве ориентанта новой жидкокристаллической среды. Установлено изменение цвета жидкокристаллической матрицы, ее рефрактивных коэффициентов и угла наклона капель сенсибилизированного жидкого кристалла на рассмотренных рельефах; измерены временны́ е параметры реакции и релаксации среды. Предложено, что жидкокристаллическая композиция является своего рода иммерсионной средой, сохраняющей свойства введенных наночастиц, что расширяет области их применения в оптоэлектронике и биомедицине.
T2  - Liquid Crystals and their Application
T1  - Functioning Features of Liquid Crystalline Cells Doped with CoFe2O4 Nanoparticles
T1  - Особенности функционирования жидкокристаллических ячеек с введенными наночастицами CoFe2O4
VL  - 22
IS  - 4
SP  - 83
EP  - 91
DO  - 10.18083/LCAppl.2022.4.83
ER  - 

@article{
author = "Kamanina, N V and Toikka, A S and Barnash, Ya. V. and Redka, D N and Lihkomanova, S V and Zybtsova, Yu. A. and Kyzhakov, P V and Jovanović, Zoran M. and Jovanović, Sonja",
year = "2022",
abstract = "The first experimental results on the functioning of liquid crystal cells doped with CoFe2O4 nanoparticles are presented. Transmission spectra in the visible and near-infrared range, dynamic parameters of the Fredericks effect, refractive characteristics, as well as wetting angles of the mesophase sensitized surfaces have been obtained. The measured surfaces were the K8 Crown glass, the conductive ITO and the ITO treated with a surface electromagnetic wave. The experiment was performed in order to establish the prospect of using such reliefs as a novel liquid crystal composite orientator sensitized with CoFe2O4 nanoparticles. A color change of the liquid crystal matrix, its refractive coefficients alterations, and the variation of inclination angle of the sensitized liquid crystal droplets on the considered reliefs were established. The time reaction parameters and the medium relaxation parameters were measured. It was proposed that the liquid crystal composition is a kind of an immersion medium that preserves properties of the introduced nanoparticles, which expands their application scope in optoelectronics and biomedicine., В работе представлены результаты первых экспериментов по функционированию жидкокристаллических ячеек с введенными в мезофазу наночастицами CoFe2O4. Измерены спектры пропускания в видимом и ближнем ИК-диапазоне, динамические параметры по эффекту Фредерикса, рефрактивные характеристики, а также углы смачивания сенсибилизированной мезофазой поверхностей на основе стекла: Крон К8, проводящего покрытия ITO и ITO, обработанного поверхностной электромагнитной волной, – для перспективы использования такового рельефа в качестве ориентанта новой жидкокристаллической среды. Установлено изменение цвета жидкокристаллической матрицы, ее рефрактивных коэффициентов и угла наклона капель сенсибилизированного жидкого кристалла на рассмотренных рельефах; измерены временны́ е параметры реакции и релаксации среды. Предложено, что жидкокристаллическая композиция является своего рода иммерсионной средой, сохраняющей свойства введенных наночастиц, что расширяет области их применения в оптоэлектронике и биомедицине.",
journal = "Liquid Crystals and their Application",
title = "Functioning Features of Liquid Crystalline Cells Doped with CoFe2O4 Nanoparticles, Особенности функционирования жидкокристаллических ячеек с введенными наночастицами CoFe2O4",
volume = "22",
number = "4",
pages = "83-91",
doi = "10.18083/LCAppl.2022.4.83"
}

Kamanina, N. V., Toikka, A. S., Barnash, Ya. V., Redka, D. N., Lihkomanova, S. V., Zybtsova, Yu. A., Kyzhakov, P. V., Jovanović, Z. M.,& Jovanović, S.. (2022). Functioning Features of Liquid Crystalline Cells Doped with CoFe2O4 Nanoparticles. in Liquid Crystals and their Application, 22(4), 83-91.
https://doi.org/10.18083/LCAppl.2022.4.83

Kamanina NV, Toikka AS, Barnash YV, Redka DN, Lihkomanova SV, Zybtsova YA, Kyzhakov PV, Jovanović ZM, Jovanović S. Functioning Features of Liquid Crystalline Cells Doped with CoFe2O4 Nanoparticles. in Liquid Crystals and their Application. 2022;22(4):83-91.
doi:10.18083/LCAppl.2022.4.83 .

Kamanina, N V, Toikka, A S, Barnash, Ya. V., Redka, D N, Lihkomanova, S V, Zybtsova, Yu. A., Kyzhakov, P V, Jovanović, Zoran M., Jovanović, Sonja, "Functioning Features of Liquid Crystalline Cells Doped with CoFe2O4 Nanoparticles" in Liquid Crystals and their Application, 22, no. 4 (2022):83-91,
https://doi.org/10.18083/LCAppl.2022.4.83 . .

TY  - CONF
AU  - Jovanović, Sonja
AU  - Grujičić, Marija
AU  - Jelić, Marko
AU  - Vukomanović, Marija
AU  - Spreitzer, Matjaž
AU  - Maček-Kržmanc, Marjeta
AU  - Peddis, Davide
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12297
AB  - In the last two decades, cobalt ferrite (CoFe2O4, CFO) has attracted extensive attention due to its applicability in data storage, catalysis, energy, environment, and in particular, biomedicine. To further extend applicability and improve understanding of fundamental processes, the present work investigates the influence of heteroatoms on physicochemical properties of CFO. Solvothermal method was used for designing a non-agglomerated particles with uniform morpho-structural properties. The physicochemical properties of Zn2+ and Ga3+ substituted CFO nanoparticles were examined (Co(1-x)ZnxFe2O4 and CoGaxFe(2-x)O4; x=0, 0.1, 0.3 and 0.5). In order to isolate the contribution of heteroatoms, the synthesis condition were optimized to allow preparation of nonagglomerated particles with the narrow particle size and shape distribution, including the constant amount of capping agent. The X-ray diffraction (XRD) measurements confirmed the presence of pure cubic spinel phase in all samples, while the transmission electron microscopy (TEM) showed sphere-like nanoparticles with a mean diameter of 6±1 nm. The amount of adsorbed oleic acid on the surface of the nanoparticles, determined by thermogravimetric (TG) analysis, is 22-28 %, which indicates the formation of a complete monolayer of surfactant. The FT-IR analysis substantiated the presence of oleic acid on the surface of the nanoparticles and discovered its covalent bonding to the metal atoms. Substitution of host-atoms was also confirmed by Raman spectroscopy. Magnetic measurements revealed the influence of heteroatoms on saturation magnetization and magnetic anisotropy, showing for all the samples superparamagnetic behavior at room temperature. The substitution of Co2+ and Fe3+ ions with Zn2+ and Ga3+, respectively, leads to the change in chemical composition and cationic distribution of CFO and consequently to variation of its magnetic properties that can be tuned for different applications.
PB  - Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade
PB  - Belgrade : Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)
C3  - IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts
T1  - Solvothermal synthesis of zinc- and gallium-substituted cobalt ferrite nanoparticles
SP  - 57
EP  - 57
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12297
ER  - 

@conference{
author = "Jovanović, Sonja and Grujičić, Marija and Jelić, Marko and Vukomanović, Marija and Spreitzer, Matjaž and Maček-Kržmanc, Marjeta and Peddis, Davide",
year = "2022",
abstract = "In the last two decades, cobalt ferrite (CoFe2O4, CFO) has attracted extensive attention due to its applicability in data storage, catalysis, energy, environment, and in particular, biomedicine. To further extend applicability and improve understanding of fundamental processes, the present work investigates the influence of heteroatoms on physicochemical properties of CFO. Solvothermal method was used for designing a non-agglomerated particles with uniform morpho-structural properties. The physicochemical properties of Zn2+ and Ga3+ substituted CFO nanoparticles were examined (Co(1-x)ZnxFe2O4 and CoGaxFe(2-x)O4; x=0, 0.1, 0.3 and 0.5). In order to isolate the contribution of heteroatoms, the synthesis condition were optimized to allow preparation of nonagglomerated particles with the narrow particle size and shape distribution, including the constant amount of capping agent. The X-ray diffraction (XRD) measurements confirmed the presence of pure cubic spinel phase in all samples, while the transmission electron microscopy (TEM) showed sphere-like nanoparticles with a mean diameter of 6±1 nm. The amount of adsorbed oleic acid on the surface of the nanoparticles, determined by thermogravimetric (TG) analysis, is 22-28 %, which indicates the formation of a complete monolayer of surfactant. The FT-IR analysis substantiated the presence of oleic acid on the surface of the nanoparticles and discovered its covalent bonding to the metal atoms. Substitution of host-atoms was also confirmed by Raman spectroscopy. Magnetic measurements revealed the influence of heteroatoms on saturation magnetization and magnetic anisotropy, showing for all the samples superparamagnetic behavior at room temperature. The substitution of Co2+ and Fe3+ ions with Zn2+ and Ga3+, respectively, leads to the change in chemical composition and cationic distribution of CFO and consequently to variation of its magnetic properties that can be tuned for different applications.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade, Belgrade : Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)",
journal = "IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts",
title = "Solvothermal synthesis of zinc- and gallium-substituted cobalt ferrite nanoparticles",
pages = "57-57",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12297"
}

Jovanović, S., Grujičić, M., Jelić, M., Vukomanović, M., Spreitzer, M., Maček-Kržmanc, M.,& Peddis, D.. (2022). Solvothermal synthesis of zinc- and gallium-substituted cobalt ferrite nanoparticles. in IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts
Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade., 57-57.
https://hdl.handle.net/21.15107/rcub_vinar_12297

Jovanović S, Grujičić M, Jelić M, Vukomanović M, Spreitzer M, Maček-Kržmanc M, Peddis D. Solvothermal synthesis of zinc- and gallium-substituted cobalt ferrite nanoparticles. in IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts. 2022;:57-57.
https://hdl.handle.net/21.15107/rcub_vinar_12297 .

Jovanović, Sonja, Grujičić, Marija, Jelić, Marko, Vukomanović, Marija, Spreitzer, Matjaž, Maček-Kržmanc, Marjeta, Peddis, Davide, "Solvothermal synthesis of zinc- and gallium-substituted cobalt ferrite nanoparticles" in IMEC 2022 : 1st Intentational conference on innovativ materials in extreme conditions : Program and Book of abstracts (2022):57-57,
https://hdl.handle.net/21.15107/rcub_vinar_12297 .

TY  - CONF
AU  - Jelić, Marko
AU  - Mravik, Željko
AU  - Jovanović, Zoran
AU  - Jovanović, Sonja
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12429
AB  - Photoeletrochemical (PEC) water splitting is a promising method for clean energy production and different oxide materials have been explored to find the right solution. Among them, as one of the most promising photoanode materials, bismuth vanadate (BiVO4) has attracted a lot of attention due to the suitable band gap edge alignment, lowcost synthesis method and great visible light harvesting features. Nowdays, research related to the BiVO4 is mostly oriented towards repairing poor charge transfer properties which exist due to the high rate of electron–hole recombination. Metal doping is one of the strategies to improve these intrinsic drawbacks. Herein, we report physicochemical properties of solvothermaly sinthesized pristine BiVO4, 1%-, 2.5%- and 5%- Cu-doped BiVO4 powders at 180 ºC for 8 h. X-ray diffraction (XRD) study indicates that, depending on the degree of doping, material exists in monoclinic or tetragonal scheelite phase. Pure monoclinic phase was formed in a case of pristine, 1%- and 2.5%- Cu doped samples. After doping with 5 %, phase transition occurred and material showed tetragonal phase. Scanning electron microscopy (SEM) reveals that samples with monoclinic phase consists of worm-like and prismatic structures while tetragonal samples exhibited spherical shape. Furthermore, structure was examined with Raman and FTIR spectroscopy. The results were in accordance with diffraction study where band positions were well matched with phase composition. Optical properties were characterized with UV–Vis diffuse reflectance spectroscopy (DRS) and photoluminescence (PL) spectroscopy. Monoclinic samples showed band gap around 2.4 eV, while sample with tetragonal phase has band gap around 2.8 eV. PL showed that that monoclinic samples possess better recombination features than tetragonal ones. Photoelectrochemical measurements suggest that material is sensitive towards visible light and, after doping, improved its performance towards oxygen evolution reaction.
PB  - Serbian Chemical Society and Serbian Young Chemists’ Club
C3  - 8th Conference of Young Chemists of Serbia : Book of abstracts
T1  - Solvothermaly synthesized copper doped bismuth vanadate
SP  - 124
EP  - 124
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12429
ER  - 

@conference{
author = "Jelić, Marko and Mravik, Željko and Jovanović, Zoran and Jovanović, Sonja",
year = "2022",
abstract = "Photoeletrochemical (PEC) water splitting is a promising method for clean energy production and different oxide materials have been explored to find the right solution. Among them, as one of the most promising photoanode materials, bismuth vanadate (BiVO4) has attracted a lot of attention due to the suitable band gap edge alignment, lowcost synthesis method and great visible light harvesting features. Nowdays, research related to the BiVO4 is mostly oriented towards repairing poor charge transfer properties which exist due to the high rate of electron–hole recombination. Metal doping is one of the strategies to improve these intrinsic drawbacks. Herein, we report physicochemical properties of solvothermaly sinthesized pristine BiVO4, 1%-, 2.5%- and 5%- Cu-doped BiVO4 powders at 180 ºC for 8 h. X-ray diffraction (XRD) study indicates that, depending on the degree of doping, material exists in monoclinic or tetragonal scheelite phase. Pure monoclinic phase was formed in a case of pristine, 1%- and 2.5%- Cu doped samples. After doping with 5 %, phase transition occurred and material showed tetragonal phase. Scanning electron microscopy (SEM) reveals that samples with monoclinic phase consists of worm-like and prismatic structures while tetragonal samples exhibited spherical shape. Furthermore, structure was examined with Raman and FTIR spectroscopy. The results were in accordance with diffraction study where band positions were well matched with phase composition. Optical properties were characterized with UV–Vis diffuse reflectance spectroscopy (DRS) and photoluminescence (PL) spectroscopy. Monoclinic samples showed band gap around 2.4 eV, while sample with tetragonal phase has band gap around 2.8 eV. PL showed that that monoclinic samples possess better recombination features than tetragonal ones. Photoelectrochemical measurements suggest that material is sensitive towards visible light and, after doping, improved its performance towards oxygen evolution reaction.",
publisher = "Serbian Chemical Society and Serbian Young Chemists’ Club",
journal = "8th Conference of Young Chemists of Serbia : Book of abstracts",
title = "Solvothermaly synthesized copper doped bismuth vanadate",
pages = "124-124",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12429"
}

Jelić, M., Mravik, Ž., Jovanović, Z.,& Jovanović, S.. (2022). Solvothermaly synthesized copper doped bismuth vanadate. in 8th Conference of Young Chemists of Serbia : Book of abstracts
Serbian Chemical Society and Serbian Young Chemists’ Club., 124-124.
https://hdl.handle.net/21.15107/rcub_vinar_12429

Jelić M, Mravik Ž, Jovanović Z, Jovanović S. Solvothermaly synthesized copper doped bismuth vanadate. in 8th Conference of Young Chemists of Serbia : Book of abstracts. 2022;:124-124.
https://hdl.handle.net/21.15107/rcub_vinar_12429 .

Jelić, Marko, Mravik, Željko, Jovanović, Zoran, Jovanović, Sonja, "Solvothermaly synthesized copper doped bismuth vanadate" in 8th Conference of Young Chemists of Serbia : Book of abstracts (2022):124-124,
https://hdl.handle.net/21.15107/rcub_vinar_12429 .

TY  - JOUR
AU  - Omelyanchik, Alexander
AU  - da Silva, Franciscarlos Gomes
AU  - Gomide, Guilherme
AU  - Kozenkov, Ivan
AU  - Depeyrot, Jerome
AU  - Aquino, Renata
AU  - Campos, Alex Fabiano Cortez
AU  - Fiorani, Dino
AU  - Peddis, Davide
AU  - Rodionova, Valeria
AU  - Jovanović, Sonja
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9857
AB  - The structural and magnetic properties of iron oxide nanoparticles obtained by the precipitation of iron ions in the presence of different amounts of citric acid were studied. The citric acid acts as a capping agent and provides control of the particle size to be obtained. The size dependence of the magnetic properties was investigated by comparing the results for ~2, 4, 6, and 8 nm particles. With decreasing the particle size, a reduction of the saturation magnetization (from ~84 to 33 Am2/kg) and an increase of coercivity (from ~32 to ~100 mT) were observed, due to the increasing role of the disordered surface. The behaviour of the zero-field cooled/field cooled magnetization curves indicates a superspin-glass freezing for 2 nm and 4 nm particle samples. Memory experiments below the freezing temperature on the 2 nm particle sample provide further evidence of a glassy magnetic state. The observation of exchange bias, due to core/shell interface exchange coupling, for 2 nm and 4 nm particle samples provides evidence of a surface spin-glass type freezing, which contributes to the observed glassy properties.
T2  - Journal of Alloys and Compounds
T1  - Effect of citric acid on the morpho-structural and magnetic properties of ultrasmall iron oxide nanoparticles
VL  - 883
SP  - 160779
DO  - 10.1016/j.jallcom.2021.160779
ER  - 

@article{
author = "Omelyanchik, Alexander and da Silva, Franciscarlos Gomes and Gomide, Guilherme and Kozenkov, Ivan and Depeyrot, Jerome and Aquino, Renata and Campos, Alex Fabiano Cortez and Fiorani, Dino and Peddis, Davide and Rodionova, Valeria and Jovanović, Sonja",
year = "2021",
abstract = "The structural and magnetic properties of iron oxide nanoparticles obtained by the precipitation of iron ions in the presence of different amounts of citric acid were studied. The citric acid acts as a capping agent and provides control of the particle size to be obtained. The size dependence of the magnetic properties was investigated by comparing the results for ~2, 4, 6, and 8 nm particles. With decreasing the particle size, a reduction of the saturation magnetization (from ~84 to 33 Am2/kg) and an increase of coercivity (from ~32 to ~100 mT) were observed, due to the increasing role of the disordered surface. The behaviour of the zero-field cooled/field cooled magnetization curves indicates a superspin-glass freezing for 2 nm and 4 nm particle samples. Memory experiments below the freezing temperature on the 2 nm particle sample provide further evidence of a glassy magnetic state. The observation of exchange bias, due to core/shell interface exchange coupling, for 2 nm and 4 nm particle samples provides evidence of a surface spin-glass type freezing, which contributes to the observed glassy properties.",
journal = "Journal of Alloys and Compounds",
title = "Effect of citric acid on the morpho-structural and magnetic properties of ultrasmall iron oxide nanoparticles",
volume = "883",
pages = "160779",
doi = "10.1016/j.jallcom.2021.160779"
}

Omelyanchik, A., da Silva, F. G., Gomide, G., Kozenkov, I., Depeyrot, J., Aquino, R., Campos, A. F. C., Fiorani, D., Peddis, D., Rodionova, V.,& Jovanović, S.. (2021). Effect of citric acid on the morpho-structural and magnetic properties of ultrasmall iron oxide nanoparticles. in Journal of Alloys and Compounds, 883, 160779.
https://doi.org/10.1016/j.jallcom.2021.160779

Omelyanchik A, da Silva FG, Gomide G, Kozenkov I, Depeyrot J, Aquino R, Campos AFC, Fiorani D, Peddis D, Rodionova V, Jovanović S. Effect of citric acid on the morpho-structural and magnetic properties of ultrasmall iron oxide nanoparticles. in Journal of Alloys and Compounds. 2021;883:160779.
doi:10.1016/j.jallcom.2021.160779 .

Omelyanchik, Alexander, da Silva, Franciscarlos Gomes, Gomide, Guilherme, Kozenkov, Ivan, Depeyrot, Jerome, Aquino, Renata, Campos, Alex Fabiano Cortez, Fiorani, Dino, Peddis, Davide, Rodionova, Valeria, Jovanović, Sonja, "Effect of citric acid on the morpho-structural and magnetic properties of ultrasmall iron oxide nanoparticles" in Journal of Alloys and Compounds, 883 (2021):160779,
https://doi.org/10.1016/j.jallcom.2021.160779 . .

TY  - CONF
AU  - Grujičić, Marija
AU  - Stojković Simatović, Ivana
AU  - Bajuk-Bogdanović, Danica
AU  - Jovanović, Zoran
AU  - Mravik, Željko
AU  - Jovanović, Sonja
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12711
AB  - In this paper, the physicochemical properties of nanocomposites of graphene oxide (GO) and cobalt ferrite nanoparticles CFO NPs (pristine and doped with zinc and gallium, CFO_Zn, CFO_Ga) were investigated. CFO, CFO_Zn and CFO_Ga NPs were synthesized using the solvothermal method with oleic acid (OA) as a surfactant. X-ray diffraction (XRD) confirmed the presence of pure ferrite phase while transmission electron microscopy (TEM) revealed spherical and non-agglomerated NPs with average size of 5±1 nm. Fourier transform infrared spectroscopy (FTIR) has confirmed bridging bidentate interaction between the oleic acid and the metal atoms on the surface of the NPs, while Raman spectroscopy results confirmed the incorporation of zinc and gallium in the spinel structure. Prior to preparation of nanocomposite with GO, an OA coating has been exchanged with dihydrocaffeic acid (DHCA). DHCA binds to surface of NPs through both covalent bridging bidentate interaction and catechol groups, as determined by FTIR. Nanocomposite has been obtained by adding CFO(_Zn/Ga) NPs to a GO suspension with nominal fractions of 5 to 15 wt.%, followed by homogenization and hydrothermal treatment (T=120 °C, t=3 h). TEM results revealed that the shape and size of NPs remain unchanged in nanocomposite, while FTIR results have shown that hydrogen bond is established between the functional groups of GO and DHCA. Electrochemical properties of individual components and nanocomposite were examined by cyclic voltammetry. The best electrochemical properties, in terms of the highest specific capacity, were shown by the composite which contains 15 wt.% CFO NPs.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - 19th Young Researchers’ Conference - Materials Science and Engineering : Program and the Book of Abstracts
T1  - Surface, structural and electric properties of ion beam irradiated graphene oxide papers
SP  - 39
EP  - 39
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12711
ER  - 

@conference{
author = "Grujičić, Marija and Stojković Simatović, Ivana and Bajuk-Bogdanović, Danica and Jovanović, Zoran and Mravik, Željko and Jovanović, Sonja",
year = "2021",
abstract = "In this paper, the physicochemical properties of nanocomposites of graphene oxide (GO) and cobalt ferrite nanoparticles CFO NPs (pristine and doped with zinc and gallium, CFO_Zn, CFO_Ga) were investigated. CFO, CFO_Zn and CFO_Ga NPs were synthesized using the solvothermal method with oleic acid (OA) as a surfactant. X-ray diffraction (XRD) confirmed the presence of pure ferrite phase while transmission electron microscopy (TEM) revealed spherical and non-agglomerated NPs with average size of 5±1 nm. Fourier transform infrared spectroscopy (FTIR) has confirmed bridging bidentate interaction between the oleic acid and the metal atoms on the surface of the NPs, while Raman spectroscopy results confirmed the incorporation of zinc and gallium in the spinel structure. Prior to preparation of nanocomposite with GO, an OA coating has been exchanged with dihydrocaffeic acid (DHCA). DHCA binds to surface of NPs through both covalent bridging bidentate interaction and catechol groups, as determined by FTIR. Nanocomposite has been obtained by adding CFO(_Zn/Ga) NPs to a GO suspension with nominal fractions of 5 to 15 wt.%, followed by homogenization and hydrothermal treatment (T=120 °C, t=3 h). TEM results revealed that the shape and size of NPs remain unchanged in nanocomposite, while FTIR results have shown that hydrogen bond is established between the functional groups of GO and DHCA. Electrochemical properties of individual components and nanocomposite were examined by cyclic voltammetry. The best electrochemical properties, in terms of the highest specific capacity, were shown by the composite which contains 15 wt.% CFO NPs.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "19th Young Researchers’ Conference - Materials Science and Engineering : Program and the Book of Abstracts",
title = "Surface, structural and electric properties of ion beam irradiated graphene oxide papers",
pages = "39-39",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12711"
}

Grujičić, M., Stojković Simatović, I., Bajuk-Bogdanović, D., Jovanović, Z., Mravik, Ž.,& Jovanović, S.. (2021). Surface, structural and electric properties of ion beam irradiated graphene oxide papers. in 19th Young Researchers’ Conference - Materials Science and Engineering : Program and the Book of Abstracts
Belgrade : Institute of Technical Sciences of SASA., 39-39.
https://hdl.handle.net/21.15107/rcub_vinar_12711

Grujičić M, Stojković Simatović I, Bajuk-Bogdanović D, Jovanović Z, Mravik Ž, Jovanović S. Surface, structural and electric properties of ion beam irradiated graphene oxide papers. in 19th Young Researchers’ Conference - Materials Science and Engineering : Program and the Book of Abstracts. 2021;:39-39.
https://hdl.handle.net/21.15107/rcub_vinar_12711 .

Grujičić, Marija, Stojković Simatović, Ivana, Bajuk-Bogdanović, Danica, Jovanović, Zoran, Mravik, Željko, Jovanović, Sonja, "Surface, structural and electric properties of ion beam irradiated graphene oxide papers" in 19th Young Researchers’ Conference - Materials Science and Engineering : Program and the Book of Abstracts (2021):39-39,
https://hdl.handle.net/21.15107/rcub_vinar_12711 .