TY  - JOUR
AU  - Huskić, Miroslav
AU  - Kepić, Dejan
AU  - Kleut, Duška
AU  - Mozetič, Miran
AU  - Vesel, Alenka
AU  - Anžlovar, Alojz
AU  - Bajuk Bogdanović, Danica
AU  - Jovanović, Svetlana
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12874
AB  - The present study focuses on correlations between three parameters: (1) graphite particle
size, (2) the ratio of graphite to oxidizing agent (KMnO4
), and (3) the ratio of graphite to acid
(H2SO4 and H3PO4
), with the reaction yield, structure, and properties of graphene oxide (GO). The
correlations are a challenge, as these three parameters can hardly be separated from each other due to
the variations in the viscosity of the system. The larger the graphite particles, the higher the viscosity
of GO. Decreasing the ratio of graphite to KMnO4
from 1:4 to 1:6 generally leads to a higher degree
of oxidation and a higher reaction yield. However, the differences are very small. Increasing the
graphite-to-acid-volume ratio from 1 g/60 mL to 1 g/80 mL, except for the smallest particles, reduced
the degree of oxidation and slightly reduced the reaction yield. However, the reaction yield mainly
depends on the extent of purification of GO by water, not on the reaction conditions. The large
differences in the thermal decomposition of GO are mainly due to the bulk particle size and less to
other parameters
T2  - Nanomaterials
T1  - The Influence of Reaction Conditions on the Properties of Graphene Oxide
VL  - 14
IS  - 3
SP  - 281
DO  - 10.3390/nano14030281
ER  - 

@article{
author = "Huskić, Miroslav and Kepić, Dejan and Kleut, Duška and Mozetič, Miran and Vesel, Alenka and Anžlovar, Alojz and Bajuk Bogdanović, Danica and Jovanović, Svetlana",
year = "2024",
abstract = "The present study focuses on correlations between three parameters: (1) graphite particle
size, (2) the ratio of graphite to oxidizing agent (KMnO4
), and (3) the ratio of graphite to acid
(H2SO4 and H3PO4
), with the reaction yield, structure, and properties of graphene oxide (GO). The
correlations are a challenge, as these three parameters can hardly be separated from each other due to
the variations in the viscosity of the system. The larger the graphite particles, the higher the viscosity
of GO. Decreasing the ratio of graphite to KMnO4
from 1:4 to 1:6 generally leads to a higher degree
of oxidation and a higher reaction yield. However, the differences are very small. Increasing the
graphite-to-acid-volume ratio from 1 g/60 mL to 1 g/80 mL, except for the smallest particles, reduced
the degree of oxidation and slightly reduced the reaction yield. However, the reaction yield mainly
depends on the extent of purification of GO by water, not on the reaction conditions. The large
differences in the thermal decomposition of GO are mainly due to the bulk particle size and less to
other parameters",
journal = "Nanomaterials",
title = "The Influence of Reaction Conditions on the Properties of Graphene Oxide",
volume = "14",
number = "3",
pages = "281",
doi = "10.3390/nano14030281"
}

Huskić, M., Kepić, D., Kleut, D., Mozetič, M., Vesel, A., Anžlovar, A., Bajuk Bogdanović, D.,& Jovanović, S.. (2024). The Influence of Reaction Conditions on the Properties of Graphene Oxide. in Nanomaterials, 14(3), 281.
https://doi.org/10.3390/nano14030281

Huskić M, Kepić D, Kleut D, Mozetič M, Vesel A, Anžlovar A, Bajuk Bogdanović D, Jovanović S. The Influence of Reaction Conditions on the Properties of Graphene Oxide. in Nanomaterials. 2024;14(3):281.
doi:10.3390/nano14030281 .

Huskić, Miroslav, Kepić, Dejan, Kleut, Duška, Mozetič, Miran, Vesel, Alenka, Anžlovar, Alojz, Bajuk Bogdanović, Danica, Jovanović, Svetlana, "The Influence of Reaction Conditions on the Properties of Graphene Oxide" in Nanomaterials, 14, no. 3 (2024):281,
https://doi.org/10.3390/nano14030281 . .

TY  - JOUR
AU  - Marković, Zoran M.
AU  - Mišović, Aleksandra
AU  - Zmejkoski, Danica
AU  - Zdravković, Nemanja M.
AU  - Kovač, Janez
AU  - Bajuk-Bogdanović, Danica
AU  - Milivojević, Dušan
AU  - Mojsin, Marija
AU  - Stevanović, Milena
AU  - Pavlović, Vladimir B.
AU  - Todorović-Marković, Biljana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11075
AB  - Nowadays, it is a great challenge to develop new medicines for treating various infectious diseases. The treatment of these diseases is of utmost interest to further prevent the development of multi-drug resistance in different pathogens. Carbon quantum dots, as a new member of the carbon nanomaterials family, can potentially be used as a highly promising visible-light-triggered antibacterial agent. In this work, the results of antibacterial and cytotoxic activities of gamma-ray-irradiated carbon quantum dots are presented. Carbon quantum dots (CQDs) were synthesized from citric acid by a pyrolysis procedure and irradiated by gamma rays at different doses (25, 50, 100 and 200 kGy). Structure, chemical composition and optical properties were investigated by atomic force microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, UV-Vis spectrometry and photoluminescence. Structural analysis showed that CQDs have a spherical-like shape and dose-dependent average diameters and heights. Antibacterial tests showed that all irradiated dots had antibacterial activity but CQDs irradiated with dose of 100 kGy had antibacterial activity against all seven pathogen-reference bacterial strains. Gamma-ray-modified CQDs did not show any cytotoxicity toward human fetal-originated MRC-5 cells. Moreover, fluorescence microscopy showed excellent cellular uptake of CQDs irradiated with doses of 25 and 200 kGy into MRC-5 cells.
T2  - Antibiotics
T1  - Employing Gamma-Ray-Modified Carbon Quantum Dots to Combat a Wide Range of Bacteria
VL  - 12
IS  - 5
SP  - 919
DO  - 10.3390/antibiotics12050919
ER  - 

@article{
author = "Marković, Zoran M. and Mišović, Aleksandra and Zmejkoski, Danica and Zdravković, Nemanja M. and Kovač, Janez and Bajuk-Bogdanović, Danica and Milivojević, Dušan and Mojsin, Marija and Stevanović, Milena and Pavlović, Vladimir B. and Todorović-Marković, Biljana",
year = "2023",
abstract = "Nowadays, it is a great challenge to develop new medicines for treating various infectious diseases. The treatment of these diseases is of utmost interest to further prevent the development of multi-drug resistance in different pathogens. Carbon quantum dots, as a new member of the carbon nanomaterials family, can potentially be used as a highly promising visible-light-triggered antibacterial agent. In this work, the results of antibacterial and cytotoxic activities of gamma-ray-irradiated carbon quantum dots are presented. Carbon quantum dots (CQDs) were synthesized from citric acid by a pyrolysis procedure and irradiated by gamma rays at different doses (25, 50, 100 and 200 kGy). Structure, chemical composition and optical properties were investigated by atomic force microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, UV-Vis spectrometry and photoluminescence. Structural analysis showed that CQDs have a spherical-like shape and dose-dependent average diameters and heights. Antibacterial tests showed that all irradiated dots had antibacterial activity but CQDs irradiated with dose of 100 kGy had antibacterial activity against all seven pathogen-reference bacterial strains. Gamma-ray-modified CQDs did not show any cytotoxicity toward human fetal-originated MRC-5 cells. Moreover, fluorescence microscopy showed excellent cellular uptake of CQDs irradiated with doses of 25 and 200 kGy into MRC-5 cells.",
journal = "Antibiotics",
title = "Employing Gamma-Ray-Modified Carbon Quantum Dots to Combat a Wide Range of Bacteria",
volume = "12",
number = "5",
pages = "919",
doi = "10.3390/antibiotics12050919"
}

Marković, Z. M., Mišović, A., Zmejkoski, D., Zdravković, N. M., Kovač, J., Bajuk-Bogdanović, D., Milivojević, D., Mojsin, M., Stevanović, M., Pavlović, V. B.,& Todorović-Marković, B.. (2023). Employing Gamma-Ray-Modified Carbon Quantum Dots to Combat a Wide Range of Bacteria. in Antibiotics, 12(5), 919.
https://doi.org/10.3390/antibiotics12050919

Marković ZM, Mišović A, Zmejkoski D, Zdravković NM, Kovač J, Bajuk-Bogdanović D, Milivojević D, Mojsin M, Stevanović M, Pavlović VB, Todorović-Marković B. Employing Gamma-Ray-Modified Carbon Quantum Dots to Combat a Wide Range of Bacteria. in Antibiotics. 2023;12(5):919.
doi:10.3390/antibiotics12050919 .

Marković, Zoran M., Mišović, Aleksandra, Zmejkoski, Danica, Zdravković, Nemanja M., Kovač, Janez, Bajuk-Bogdanović, Danica, Milivojević, Dušan, Mojsin, Marija, Stevanović, Milena, Pavlović, Vladimir B., Todorović-Marković, Biljana, "Employing Gamma-Ray-Modified Carbon Quantum Dots to Combat a Wide Range of Bacteria" in Antibiotics, 12, no. 5 (2023):919,
https://doi.org/10.3390/antibiotics12050919 . .

TY  - JOUR
AU  - Anićijević, Vladan J.
AU  - Tasić, Tamara
AU  - Milanković, Vedran
AU  - Breitenbach, Stefan
AU  - Unterweger, Christoph
AU  - Fürst, Christian
AU  - Bajuk-Bogdanović, Danica V.
AU  - Pašti, Igor A.
AU  - Lazarević-Pašti, Tamara
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10751
AB  - Growing pollution is making it necessary to find new strategies and materials for the removal of undesired compounds from the environment. Adsorption is still one of the simplest and most efficient routes for the remediation of air, soil, and water. However, the choice of adsorbent for a given application ultimately depends on its performance assessment results. Here, we show that the uptake of and capacity for dimethoate adsorption by different viscose-derived (activated) carbons strongly depend on the adsorbent dose applied in the adsorption measurements. The specific surface areas of the investigated materials varied across a wide range from 264 m2 g−1 to 2833 m2 g−1. For a dimethoate concentration of 5 × 10−4 mol L−1 and a high adsorbent dose of 10 mg mL−1, the adsorption capacities were all below 15 mg g−1. In the case of high-surface-area activated carbons, the uptakes were almost 100% under identical conditions. However, when the adsorbent dose was reduced to 0.01 mg mL−1, uptake was significantly reduced, but adsorption capacities as high as 1280 mg g−1 were obtained. Further, adsorption capacities were linked to adsorbents’ physical and chemical properties (specific surface area, pore size distribution, chemical composition), and thermodynamic parameters for the adsorption process were evaluated. Based on the Gibbs free energy of the adsorption process, it can be suggested that physisorption was operative for all studied adsorbents. Finally, we suggest that a proper comparison of different adsorbents requires standardization of the protocols used to evaluate pollutant uptakes and adsorption capacities.
T2  - International Journal of Environmental Research and Public Health
T1  - How Well Do Our Adsorbents Actually Perform?—The Case of Dimethoate Removal Using Viscose Fiber-Derived Carbons
VL  - 20
IS  - 5
SP  - 4553
DO  - 10.3390/ijerph20054553
ER  - 

@article{
author = "Anićijević, Vladan J. and Tasić, Tamara and Milanković, Vedran and Breitenbach, Stefan and Unterweger, Christoph and Fürst, Christian and Bajuk-Bogdanović, Danica V. and Pašti, Igor A. and Lazarević-Pašti, Tamara",
year = "2023",
abstract = "Growing pollution is making it necessary to find new strategies and materials for the removal of undesired compounds from the environment. Adsorption is still one of the simplest and most efficient routes for the remediation of air, soil, and water. However, the choice of adsorbent for a given application ultimately depends on its performance assessment results. Here, we show that the uptake of and capacity for dimethoate adsorption by different viscose-derived (activated) carbons strongly depend on the adsorbent dose applied in the adsorption measurements. The specific surface areas of the investigated materials varied across a wide range from 264 m2 g−1 to 2833 m2 g−1. For a dimethoate concentration of 5 × 10−4 mol L−1 and a high adsorbent dose of 10 mg mL−1, the adsorption capacities were all below 15 mg g−1. In the case of high-surface-area activated carbons, the uptakes were almost 100% under identical conditions. However, when the adsorbent dose was reduced to 0.01 mg mL−1, uptake was significantly reduced, but adsorption capacities as high as 1280 mg g−1 were obtained. Further, adsorption capacities were linked to adsorbents’ physical and chemical properties (specific surface area, pore size distribution, chemical composition), and thermodynamic parameters for the adsorption process were evaluated. Based on the Gibbs free energy of the adsorption process, it can be suggested that physisorption was operative for all studied adsorbents. Finally, we suggest that a proper comparison of different adsorbents requires standardization of the protocols used to evaluate pollutant uptakes and adsorption capacities.",
journal = "International Journal of Environmental Research and Public Health",
title = "How Well Do Our Adsorbents Actually Perform?—The Case of Dimethoate Removal Using Viscose Fiber-Derived Carbons",
volume = "20",
number = "5",
pages = "4553",
doi = "10.3390/ijerph20054553"
}

Anićijević, V. J., Tasić, T., Milanković, V., Breitenbach, S., Unterweger, C., Fürst, C., Bajuk-Bogdanović, D. V., Pašti, I. A.,& Lazarević-Pašti, T.. (2023). How Well Do Our Adsorbents Actually Perform?—The Case of Dimethoate Removal Using Viscose Fiber-Derived Carbons. in International Journal of Environmental Research and Public Health, 20(5), 4553.
https://doi.org/10.3390/ijerph20054553

Anićijević VJ, Tasić T, Milanković V, Breitenbach S, Unterweger C, Fürst C, Bajuk-Bogdanović DV, Pašti IA, Lazarević-Pašti T. How Well Do Our Adsorbents Actually Perform?—The Case of Dimethoate Removal Using Viscose Fiber-Derived Carbons. in International Journal of Environmental Research and Public Health. 2023;20(5):4553.
doi:10.3390/ijerph20054553 .

Anićijević, Vladan J., Tasić, Tamara, Milanković, Vedran, Breitenbach, Stefan, Unterweger, Christoph, Fürst, Christian, Bajuk-Bogdanović, Danica V., Pašti, Igor A., Lazarević-Pašti, Tamara, "How Well Do Our Adsorbents Actually Perform?—The Case of Dimethoate Removal Using Viscose Fiber-Derived Carbons" in International Journal of Environmental Research and Public Health, 20, no. 5 (2023):4553,
https://doi.org/10.3390/ijerph20054553 . .

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  - 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  - Vujković, Milica
AU  - Jovanović, Zoran M.
AU  - Bajuk-Bogdanović, Danica
AU  - Tomić, Nataša
AU  - Čebela, Maria
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11478
AB  - Unlike its ferroelectric and magnetic properties [1], the electrochemical behavior of bismuth ferrite, BiFeO3 (BFO) has received less attention [2]. In this contribution, BFO was hydrothermally synthesized [3] to be examined as an electrode for metal- ion aqueous rechargeable batteries. BFO powder was first investigated in terms of structural and surface properties using X-ray diffraction and Thermally-Programmed Desorption methods and then characterized in Li and Na- containing aqueous electrolytes using Cyclic Voltammetry and Chronopotentiometry. BFO was found to be inactive within the electrochemical potential window of the aqueous electrolyte. However, its ability to be electrochemically transformed, under deep cathodic polarization, results in an active phase composed of Bi- and Fe-based oxides, as confirmed by Fourier-transform infrared and Raman spectroscopy. The redox behavior of BFO-derived oxide electrode is compared in both Li and Na -based aqueous electrolytes and discussed in the context of tailoring electrochemical properties for safe and sustainable metal-ion batteries.
PB  - Belgrade : University of Belgrade, Institute for Multidisciplinary Research
C3  - Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade
T1  - What Happens When BiFeO3 Undergoes Potentiodynamic Polarization?
SP  - 121
EP  - 121
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11478
ER  - 

@conference{
author = "Vujković, Milica and Jovanović, Zoran M. and Bajuk-Bogdanović, Danica and Tomić, Nataša and Čebela, Maria",
year = "2023",
abstract = "Unlike its ferroelectric and magnetic properties [1], the electrochemical behavior of bismuth ferrite, BiFeO3 (BFO) has received less attention [2]. In this contribution, BFO was hydrothermally synthesized [3] to be examined as an electrode for metal- ion aqueous rechargeable batteries. BFO powder was first investigated in terms of structural and surface properties using X-ray diffraction and Thermally-Programmed Desorption methods and then characterized in Li and Na- containing aqueous electrolytes using Cyclic Voltammetry and Chronopotentiometry. BFO was found to be inactive within the electrochemical potential window of the aqueous electrolyte. However, its ability to be electrochemically transformed, under deep cathodic polarization, results in an active phase composed of Bi- and Fe-based oxides, as confirmed by Fourier-transform infrared and Raman spectroscopy. The redox behavior of BFO-derived oxide electrode is compared in both Li and Na -based aqueous electrolytes and discussed in the context of tailoring electrochemical properties for safe and sustainable metal-ion batteries.",
publisher = "Belgrade : University of Belgrade, Institute for Multidisciplinary Research",
journal = "Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade",
title = "What Happens When BiFeO3 Undergoes Potentiodynamic Polarization?",
pages = "121-121",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11478"
}

Vujković, M., Jovanović, Z. M., Bajuk-Bogdanović, D., Tomić, N.,& Čebela, M.. (2023). What Happens When BiFeO3 Undergoes Potentiodynamic Polarization?. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade
Belgrade : University of Belgrade, Institute for Multidisciplinary Research., 121-121.
https://hdl.handle.net/21.15107/rcub_vinar_11478

Vujković M, Jovanović ZM, Bajuk-Bogdanović D, Tomić N, Čebela M. What Happens When BiFeO3 Undergoes Potentiodynamic Polarization?. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade. 2023;:121-121.
https://hdl.handle.net/21.15107/rcub_vinar_11478 .

Vujković, Milica, Jovanović, Zoran M., Bajuk-Bogdanović, Danica, Tomić, Nataša, Čebela, Maria, "What Happens When BiFeO3 Undergoes Potentiodynamic Polarization?" in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade (2023):121-121,
https://hdl.handle.net/21.15107/rcub_vinar_11478 .

TY  - JOUR
AU  - Jevremović, Anka
AU  - Savić, Marjetka
AU  - Janošević Ležaić, Aleksandra
AU  - Krstić, Jugoslav
AU  - Gavrilov, Nemanja
AU  - Bajuk-Bogdanović, Danica
AU  - Milojević-Rakić, Maja
AU  - Ćirić-Marjanović, Gordana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12211
AB  - The environmental application of the carbonized composites of the Zn-containing metal-organic framework MOF-5 and polyaniline (PANI) in its emeraldine salt and base forms (C-(MOF-5/PANI)) was investigated for the first time. Textural properties and particle size distributions revealed that composites are dominantly mesoporous and nanoscale in nature, while Raman spectroscopy revealed the ZnO phase beneath the carbon matrix. Adsorption of pesticide, dye, and metal cation on C-(MOF-5/PANI) composites in aqueous solutions was evaluated and compared with the behavior of the precursor components, carbonized MOF-5 (cMOF), and carbonized PANIs. A lower MOF-5 content in the precursor, a higher specific surface area, and the pore volume of the composites led to improved adsorption performance for acetamiprid (124 mg/g) and Methylene Blue (135 mg/g). The presence of O/N functional groups in composites is essential for the adsorption of nitrogen-rich pollutants through hydrogen bonding with an estimated monolayer capacity twice as high as that of cMOF. The proton exchange accompanying Cd2+ retention was associated with the Zn/Cd ion exchange, and the highest capacity (9.8 mg/g) was observed for the composite synthesized from the precursor with a high MOF-5 content. The multifunctionality of composites was evidenced in mixtures of pollutants where noticeably better performance for Cd2+ removal was found for the composite compared to cMOF. Competitive binding between three pollutants favored the adsorption of pesticide and dye, thereby hindering to some extent the ion exchange necessary for the removal of metal cations. The results emphasize the importance of the PANI form and MOF-5/PANI weight ratio in precursors for the development of surface, porosity, and active sites in C-(MOF-5/PANI) composites, thus guiding their environmental efficiency. The study also demonstrated that C-(MOF-5/PANI) composites retained studied pollutants much better than carbonized precursor PANIs and showed comparable or better adsorption ability than cMOF.
T2  - Polymers
T1  - Environmental Potential of Carbonized MOF-5/PANI Composites for Pesticide, Dye, and Metal Cations—Can They Actually Retain Them All?
VL  - 15
IS  - 22
SP  - 4349
DO  - 10.3390/polym15224349
ER  - 

@article{
author = "Jevremović, Anka and Savić, Marjetka and Janošević Ležaić, Aleksandra and Krstić, Jugoslav and Gavrilov, Nemanja and Bajuk-Bogdanović, Danica and Milojević-Rakić, Maja and Ćirić-Marjanović, Gordana",
year = "2023",
abstract = "The environmental application of the carbonized composites of the Zn-containing metal-organic framework MOF-5 and polyaniline (PANI) in its emeraldine salt and base forms (C-(MOF-5/PANI)) was investigated for the first time. Textural properties and particle size distributions revealed that composites are dominantly mesoporous and nanoscale in nature, while Raman spectroscopy revealed the ZnO phase beneath the carbon matrix. Adsorption of pesticide, dye, and metal cation on C-(MOF-5/PANI) composites in aqueous solutions was evaluated and compared with the behavior of the precursor components, carbonized MOF-5 (cMOF), and carbonized PANIs. A lower MOF-5 content in the precursor, a higher specific surface area, and the pore volume of the composites led to improved adsorption performance for acetamiprid (124 mg/g) and Methylene Blue (135 mg/g). The presence of O/N functional groups in composites is essential for the adsorption of nitrogen-rich pollutants through hydrogen bonding with an estimated monolayer capacity twice as high as that of cMOF. The proton exchange accompanying Cd2+ retention was associated with the Zn/Cd ion exchange, and the highest capacity (9.8 mg/g) was observed for the composite synthesized from the precursor with a high MOF-5 content. The multifunctionality of composites was evidenced in mixtures of pollutants where noticeably better performance for Cd2+ removal was found for the composite compared to cMOF. Competitive binding between three pollutants favored the adsorption of pesticide and dye, thereby hindering to some extent the ion exchange necessary for the removal of metal cations. The results emphasize the importance of the PANI form and MOF-5/PANI weight ratio in precursors for the development of surface, porosity, and active sites in C-(MOF-5/PANI) composites, thus guiding their environmental efficiency. The study also demonstrated that C-(MOF-5/PANI) composites retained studied pollutants much better than carbonized precursor PANIs and showed comparable or better adsorption ability than cMOF.",
journal = "Polymers",
title = "Environmental Potential of Carbonized MOF-5/PANI Composites for Pesticide, Dye, and Metal Cations—Can They Actually Retain Them All?",
volume = "15",
number = "22",
pages = "4349",
doi = "10.3390/polym15224349"
}

Jevremović, A., Savić, M., Janošević Ležaić, A., Krstić, J., Gavrilov, N., Bajuk-Bogdanović, D., Milojević-Rakić, M.,& Ćirić-Marjanović, G.. (2023). Environmental Potential of Carbonized MOF-5/PANI Composites for Pesticide, Dye, and Metal Cations—Can They Actually Retain Them All?. in Polymers, 15(22), 4349.
https://doi.org/10.3390/polym15224349

Jevremović A, Savić M, Janošević Ležaić A, Krstić J, Gavrilov N, Bajuk-Bogdanović D, Milojević-Rakić M, Ćirić-Marjanović G. Environmental Potential of Carbonized MOF-5/PANI Composites for Pesticide, Dye, and Metal Cations—Can They Actually Retain Them All?. in Polymers. 2023;15(22):4349.
doi:10.3390/polym15224349 .

Jevremović, Anka, Savić, Marjetka, Janošević Ležaić, Aleksandra, Krstić, Jugoslav, Gavrilov, Nemanja, Bajuk-Bogdanović, Danica, Milojević-Rakić, Maja, Ćirić-Marjanović, Gordana, "Environmental Potential of Carbonized MOF-5/PANI Composites for Pesticide, Dye, and Metal Cations—Can They Actually Retain Them All?" in Polymers, 15, no. 22 (2023):4349,
https://doi.org/10.3390/polym15224349 . .

TY  - CONF
AU  - Dorontić, Slađana
AU  - Sredojević, Dušan
AU  - Bajuk-Bogdanović, Danica
AU  - Jovanović, Svetlana P.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12498
AB  - The increasing presence of pesticides and heavy metals in the environment and their negative impact on human, animal, and plant health, demand green, low-cost, and simple methods for their monitoring. Due to photoluminescence (PL) in the visible part of the spectrum, biocompatibility, and ecological acceptability, graphene quantum dots (GQDs) are at the center of attention in the field of optical sensing. GQDs show great potential as PL sensors for Pd(II) ions and insecticide carbofuran. In this work, FTIR spectroscopy and Density Functional Theory (DFT) calculation were used to resolve the mechanism of PL change in the presence of these analytes.
PB  - Szeged : University of Szeged
C3  - 28th International Symposium on Analytical and Environmental Problems : Proceedings; November 14-15, 2022; Szeged, Hungary
T1  - The Mechanism Behind Pd(II) and Carbofuran-Induced Change of Graphene Quantum Dots Photoluminescence Intensity
SP  - 124
EP  - 128
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12498
ER  - 

@conference{
author = "Dorontić, Slađana and Sredojević, Dušan and Bajuk-Bogdanović, Danica and Jovanović, Svetlana P.",
year = "2022",
abstract = "The increasing presence of pesticides and heavy metals in the environment and their negative impact on human, animal, and plant health, demand green, low-cost, and simple methods for their monitoring. Due to photoluminescence (PL) in the visible part of the spectrum, biocompatibility, and ecological acceptability, graphene quantum dots (GQDs) are at the center of attention in the field of optical sensing. GQDs show great potential as PL sensors for Pd(II) ions and insecticide carbofuran. In this work, FTIR spectroscopy and Density Functional Theory (DFT) calculation were used to resolve the mechanism of PL change in the presence of these analytes.",
publisher = "Szeged : University of Szeged",
journal = "28th International Symposium on Analytical and Environmental Problems : Proceedings; November 14-15, 2022; Szeged, Hungary",
title = "The Mechanism Behind Pd(II) and Carbofuran-Induced Change of Graphene Quantum Dots Photoluminescence Intensity",
pages = "124-128",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12498"
}

Dorontić, S., Sredojević, D., Bajuk-Bogdanović, D.,& Jovanović, S. P.. (2022). The Mechanism Behind Pd(II) and Carbofuran-Induced Change of Graphene Quantum Dots Photoluminescence Intensity. in 28th International Symposium on Analytical and Environmental Problems : Proceedings; November 14-15, 2022; Szeged, Hungary
Szeged : University of Szeged., 124-128.
https://hdl.handle.net/21.15107/rcub_vinar_12498

Dorontić S, Sredojević D, Bajuk-Bogdanović D, Jovanović SP. The Mechanism Behind Pd(II) and Carbofuran-Induced Change of Graphene Quantum Dots Photoluminescence Intensity. in 28th International Symposium on Analytical and Environmental Problems : Proceedings; November 14-15, 2022; Szeged, Hungary. 2022;:124-128.
https://hdl.handle.net/21.15107/rcub_vinar_12498 .

Dorontić, Slađana, Sredojević, Dušan, Bajuk-Bogdanović, Danica, Jovanović, Svetlana P., "The Mechanism Behind Pd(II) and Carbofuran-Induced Change of Graphene Quantum Dots Photoluminescence Intensity" in 28th International Symposium on Analytical and Environmental Problems : Proceedings; November 14-15, 2022; Szeged, Hungary (2022):124-128,
https://hdl.handle.net/21.15107/rcub_vinar_12498 .

TY  - JOUR
AU  - Dorontić, Slađana
AU  - Bonasera, Aurelio
AU  - Scopelliti, Michelangelo
AU  - Marković, Olivera
AU  - Bajuk Bogdanović, Danica
AU  - Ciasca, Gabriele
AU  - Romanò, Sabrina
AU  - Dimkić, Ivica
AU  - Budimir, Milica
AU  - Marinković, Dragana
AU  - Jovanović, Svetlana P.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10406
AB  - Structural modification of different carbon-based nanomaterials is often necessary toimprove their morphology and optical properties, particularly the incorporation of N-atoms ingraphene quantum dots (GQDs). Here, a clean, simple, one-step, and eco-friendly method forN-doping of GQDs using gamma irradiation is reported. GQDs were irradiated in the presenceof the different ethylenediamine (EDA) amounts (1 g, 5 g, and 10 g) and the highest % of N wasdetected in the presence of 10 g. N-doped GQDs emitted strong, blue photoluminescence (PL).Photoluminescence quantum yield was increased from 1.45, as obtained for non-irradiated dots,to 7.24% for those irradiated in the presence of 1 g of EDA. Modified GQDs were investigated asa PL probe for the detection of insecticide Carbofuran (2,2-Dimethyl-2,3-dihydro-1-benzofuran-7-yl methylcarbamate) and herbicide Amitrole (3-amino-1,2,4-triazole). The limit of detection was5.4 µmol L−1for Carbofuran. For the first time, Amitrole was detected by GQDs in a turn-off/turn-onmechanism using Pd(II) ions as a quenching agent. First, Pd(II) ions were quenched (turn-off) PLof GQDs, while after Amitrole addition, PL was recovered linearly with Amitrole concentration(turn-on). LOD was 2.03 µmol L−1. These results suggest that modified GQDs can be used as anefficient new material for Carbofuran and Amitrole detection. Furthermore, the phototoxicity of dotswas investigated on both Gram-positive and Gram-negative bacterial strains. When bacterial cellswere exposed to different GQD concentrations and illuminated with light of 470 nm wavelength, thetoxic effects were not observed.
T2  - Nanomaterials
T1  - Gamma-ray-induced structural transformation of GQDs towards the improvement of their optical properties, monitoring of selected toxic compounds, and photo-induced effect on bacterial strains
VL  - 12
SP  - 2714
DO  - 10.3390/nano12152714
ER  - 

@article{
author = "Dorontić, Slađana and Bonasera, Aurelio and Scopelliti, Michelangelo and Marković, Olivera and Bajuk Bogdanović, Danica and Ciasca, Gabriele and Romanò, Sabrina and Dimkić, Ivica and Budimir, Milica and Marinković, Dragana and Jovanović, Svetlana P.",
year = "2022",
abstract = "Structural modification of different carbon-based nanomaterials is often necessary toimprove their morphology and optical properties, particularly the incorporation of N-atoms ingraphene quantum dots (GQDs). Here, a clean, simple, one-step, and eco-friendly method forN-doping of GQDs using gamma irradiation is reported. GQDs were irradiated in the presenceof the different ethylenediamine (EDA) amounts (1 g, 5 g, and 10 g) and the highest % of N wasdetected in the presence of 10 g. N-doped GQDs emitted strong, blue photoluminescence (PL).Photoluminescence quantum yield was increased from 1.45, as obtained for non-irradiated dots,to 7.24% for those irradiated in the presence of 1 g of EDA. Modified GQDs were investigated asa PL probe for the detection of insecticide Carbofuran (2,2-Dimethyl-2,3-dihydro-1-benzofuran-7-yl methylcarbamate) and herbicide Amitrole (3-amino-1,2,4-triazole). The limit of detection was5.4 µmol L−1for Carbofuran. For the first time, Amitrole was detected by GQDs in a turn-off/turn-onmechanism using Pd(II) ions as a quenching agent. First, Pd(II) ions were quenched (turn-off) PLof GQDs, while after Amitrole addition, PL was recovered linearly with Amitrole concentration(turn-on). LOD was 2.03 µmol L−1. These results suggest that modified GQDs can be used as anefficient new material for Carbofuran and Amitrole detection. Furthermore, the phototoxicity of dotswas investigated on both Gram-positive and Gram-negative bacterial strains. When bacterial cellswere exposed to different GQD concentrations and illuminated with light of 470 nm wavelength, thetoxic effects were not observed.",
journal = "Nanomaterials",
title = "Gamma-ray-induced structural transformation of GQDs towards the improvement of their optical properties, monitoring of selected toxic compounds, and photo-induced effect on bacterial strains",
volume = "12",
pages = "2714",
doi = "10.3390/nano12152714"
}

Dorontić, S., Bonasera, A., Scopelliti, M., Marković, O., Bajuk Bogdanović, D., Ciasca, G., Romanò, S., Dimkić, I., Budimir, M., Marinković, D.,& Jovanović, S. P.. (2022). Gamma-ray-induced structural transformation of GQDs towards the improvement of their optical properties, monitoring of selected toxic compounds, and photo-induced effect on bacterial strains. in Nanomaterials, 12, 2714.
https://doi.org/10.3390/nano12152714

Dorontić S, Bonasera A, Scopelliti M, Marković O, Bajuk Bogdanović D, Ciasca G, Romanò S, Dimkić I, Budimir M, Marinković D, Jovanović SP. Gamma-ray-induced structural transformation of GQDs towards the improvement of their optical properties, monitoring of selected toxic compounds, and photo-induced effect on bacterial strains. in Nanomaterials. 2022;12:2714.
doi:10.3390/nano12152714 .

Dorontić, Slađana, Bonasera, Aurelio, Scopelliti, Michelangelo, Marković, Olivera, Bajuk Bogdanović, Danica, Ciasca, Gabriele, Romanò, Sabrina, Dimkić, Ivica, Budimir, Milica, Marinković, Dragana, Jovanović, Svetlana P., "Gamma-ray-induced structural transformation of GQDs towards the improvement of their optical properties, monitoring of selected toxic compounds, and photo-induced effect on bacterial strains" in Nanomaterials, 12 (2022):2714,
https://doi.org/10.3390/nano12152714 . .

TY  - JOUR
AU  - Mišović, Aleksandra
AU  - Bajuk-Bogdanović, Danica V.
AU  - Kepić, Dejan
AU  - Pavlović, Vladimir B.
AU  - Huskić, Miroslav
AU  - Hasheminejad, Navid
AU  - Vuye, Cedric
AU  - Zorić, Nemanja
AU  - Jovanović, Svetlana P.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10078
AB  - The need for stable, chemical resistant and conductive materials is on the rise in recent times. Graphene shows promising electrical conductivity and chemical stability, but the production of a continual, conductive layer is limited and expensive. Silver nanowires (AgNWs) are both conducive and economically viable, but they are sensitive to water and oxygen. In this study, graphene oxide (GO) and AgNWs were synthesized and combined in different mass ratios (3:1, 2.5:1.5, and 1:1) to obtain chemically stable composites with improved electrical properties. Composites were reduced using ascorbic acid. With the increase of AgNWs to GO mass ratio, the surface of the free-standing composite film improved: the root mean square roughness was lowered from 376 nm for GO to 168 nm for the composite with the mass ratio of GO:AgNWs 1:1, while the sheet resistance was lowered from 146 × 106 Ω/□ to 4 Ω/□. For the first time, the effects of gamma irradiation on the structure of the composites were studied. Doses of 15, 25, and 35 kGy were applied.
T2  - Synthetic Metals
T1  - Properties of free-standing graphene oxide/silver nanowires films and effects of chemical reduction and gamma irradiation
VL  - 283
SP  - 116980
DO  - 10.1016/j.synthmet.2021.116980
ER  - 

@article{
author = "Mišović, Aleksandra and Bajuk-Bogdanović, Danica V. and Kepić, Dejan and Pavlović, Vladimir B. and Huskić, Miroslav and Hasheminejad, Navid and Vuye, Cedric and Zorić, Nemanja and Jovanović, Svetlana P.",
year = "2022",
abstract = "The need for stable, chemical resistant and conductive materials is on the rise in recent times. Graphene shows promising electrical conductivity and chemical stability, but the production of a continual, conductive layer is limited and expensive. Silver nanowires (AgNWs) are both conducive and economically viable, but they are sensitive to water and oxygen. In this study, graphene oxide (GO) and AgNWs were synthesized and combined in different mass ratios (3:1, 2.5:1.5, and 1:1) to obtain chemically stable composites with improved electrical properties. Composites were reduced using ascorbic acid. With the increase of AgNWs to GO mass ratio, the surface of the free-standing composite film improved: the root mean square roughness was lowered from 376 nm for GO to 168 nm for the composite with the mass ratio of GO:AgNWs 1:1, while the sheet resistance was lowered from 146 × 106 Ω/□ to 4 Ω/□. For the first time, the effects of gamma irradiation on the structure of the composites were studied. Doses of 15, 25, and 35 kGy were applied.",
journal = "Synthetic Metals",
title = "Properties of free-standing graphene oxide/silver nanowires films and effects of chemical reduction and gamma irradiation",
volume = "283",
pages = "116980",
doi = "10.1016/j.synthmet.2021.116980"
}

Mišović, A., Bajuk-Bogdanović, D. V., Kepić, D., Pavlović, V. B., Huskić, M., Hasheminejad, N., Vuye, C., Zorić, N.,& Jovanović, S. P.. (2022). Properties of free-standing graphene oxide/silver nanowires films and effects of chemical reduction and gamma irradiation. in Synthetic Metals, 283, 116980.
https://doi.org/10.1016/j.synthmet.2021.116980

Mišović A, Bajuk-Bogdanović DV, Kepić D, Pavlović VB, Huskić M, Hasheminejad N, Vuye C, Zorić N, Jovanović SP. Properties of free-standing graphene oxide/silver nanowires films and effects of chemical reduction and gamma irradiation. in Synthetic Metals. 2022;283:116980.
doi:10.1016/j.synthmet.2021.116980 .

Mišović, Aleksandra, Bajuk-Bogdanović, Danica V., Kepić, Dejan, Pavlović, Vladimir B., Huskić, Miroslav, Hasheminejad, Navid, Vuye, Cedric, Zorić, Nemanja, Jovanović, Svetlana P., "Properties of free-standing graphene oxide/silver nanowires films and effects of chemical reduction and gamma irradiation" in Synthetic Metals, 283 (2022):116980,
https://doi.org/10.1016/j.synthmet.2021.116980 . .

TY  - JOUR
AU  - Jevremović, Anka
AU  - Stanojković, Ana
AU  - Arsenijević, Dragana
AU  - Arsenijević, Aleksandar
AU  - Arzumanyan, Grigory
AU  - Mamatkulov, Kahramon
AU  - Petrović, Jelena
AU  - Nedić Vasiljević, Bojana
AU  - Bajuk-Bogdanović, Danica V.
AU  - Milojević-Rakić, Maja
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10301
AB  - All remediation pathways in aqueous solutions come down to three dominant ones - physical, chemical, and combinations thereof. Materials proposed for adsorption and oxidative degradation can induce positive or negative effects on cells compared to the pollutants themselves. Present research deals with the effects different methods for pesticide remediation have and how they impact cytotoxicity. With this particular intention, Fe-modified zeolites (obtained via citrate/oxalate complexes) of three zeotypes (MFI, BEA and FAU) were prepared and tested as adsorbents and Fenton catalysts for the removal of the acetamiprid pesticide. The materials are characterized by AFM, FTIR spectroscopy and ICP-OES. A different effect of the zeolite framework and modification route was found among the samples, which leads to pronounced adsorption (FAU), efficient Fenton degradation (MFI) or synergistic effect of both mechanisms (BEA). The cytotoxic effects of acetamiprid in the presence of zeolites, in pristine and modified forms, were tested on the MRC-5 human fibroblast cell line. A complete survey of the toxicity effect behind different pesticide removal methods is presented. Since neither adsorption nor catalytic degradation is the best option for pesticide removal, the focus is shifted to a combination of these methods, which proved to be optimal for pesticide toxicity reduction.
T2  - Journal of Hazardous Materials
T1  - Mitigating toxicity of acetamiprid removal techniques – Fe modified zeolites in focus
VL  - 436
SP  - 129226
DO  - 10.1016/j.jhazmat.2022.129226
ER  - 

@article{
author = "Jevremović, Anka and Stanojković, Ana and Arsenijević, Dragana and Arsenijević, Aleksandar and Arzumanyan, Grigory and Mamatkulov, Kahramon and Petrović, Jelena and Nedić Vasiljević, Bojana and Bajuk-Bogdanović, Danica V. and Milojević-Rakić, Maja",
year = "2022",
abstract = "All remediation pathways in aqueous solutions come down to three dominant ones - physical, chemical, and combinations thereof. Materials proposed for adsorption and oxidative degradation can induce positive or negative effects on cells compared to the pollutants themselves. Present research deals with the effects different methods for pesticide remediation have and how they impact cytotoxicity. With this particular intention, Fe-modified zeolites (obtained via citrate/oxalate complexes) of three zeotypes (MFI, BEA and FAU) were prepared and tested as adsorbents and Fenton catalysts for the removal of the acetamiprid pesticide. The materials are characterized by AFM, FTIR spectroscopy and ICP-OES. A different effect of the zeolite framework and modification route was found among the samples, which leads to pronounced adsorption (FAU), efficient Fenton degradation (MFI) or synergistic effect of both mechanisms (BEA). The cytotoxic effects of acetamiprid in the presence of zeolites, in pristine and modified forms, were tested on the MRC-5 human fibroblast cell line. A complete survey of the toxicity effect behind different pesticide removal methods is presented. Since neither adsorption nor catalytic degradation is the best option for pesticide removal, the focus is shifted to a combination of these methods, which proved to be optimal for pesticide toxicity reduction.",
journal = "Journal of Hazardous Materials",
title = "Mitigating toxicity of acetamiprid removal techniques – Fe modified zeolites in focus",
volume = "436",
pages = "129226",
doi = "10.1016/j.jhazmat.2022.129226"
}

Jevremović, A., Stanojković, A., Arsenijević, D., Arsenijević, A., Arzumanyan, G., Mamatkulov, K., Petrović, J., Nedić Vasiljević, B., Bajuk-Bogdanović, D. V.,& Milojević-Rakić, M.. (2022). Mitigating toxicity of acetamiprid removal techniques – Fe modified zeolites in focus. in Journal of Hazardous Materials, 436, 129226.
https://doi.org/10.1016/j.jhazmat.2022.129226

Jevremović A, Stanojković A, Arsenijević D, Arsenijević A, Arzumanyan G, Mamatkulov K, Petrović J, Nedić Vasiljević B, Bajuk-Bogdanović DV, Milojević-Rakić M. Mitigating toxicity of acetamiprid removal techniques – Fe modified zeolites in focus. in Journal of Hazardous Materials. 2022;436:129226.
doi:10.1016/j.jhazmat.2022.129226 .

Jevremović, Anka, Stanojković, Ana, Arsenijević, Dragana, Arsenijević, Aleksandar, Arzumanyan, Grigory, Mamatkulov, Kahramon, Petrović, Jelena, Nedić Vasiljević, Bojana, Bajuk-Bogdanović, Danica V., Milojević-Rakić, Maja, "Mitigating toxicity of acetamiprid removal techniques – Fe modified zeolites in focus" in Journal of Hazardous Materials, 436 (2022):129226,
https://doi.org/10.1016/j.jhazmat.2022.129226 . .

TY  - JOUR
AU  - Jocić, Ana
AU  - Breitenbach, Stefan
AU  - Bajuk-Bogdanović, Danica V.
AU  - Pašti, Igor A.
AU  - Unterweger, Cristoph
AU  - Fürst, Christian
AU  - Lazarević-Pašti, Tamara
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10185
AB  - Extensive use of pesticides resulting in their accumulation in the environment presents a hazard for their non-target species, including humans. Hence, efficient remediation strategies are needed, and, in this sense, adsorption is seen as the most straightforward approach. We have studied activated carbon fibers (ACFs) derived from viscose fibers impregnated with diammonium hydrogen phosphate (DAHP). By changing the amount of DAHP in the impregnation step, the chemical composition and textural properties of ACFs are effectively tuned, affecting their performance for dimethoate removal from water. The prepared ACFs effectively reduced the toxicity of treated water samples, both deionized water solutions and spiked tap water samples, under batch conditions and in dynamic filtration experiments. Using the results of physicochemical characterization and dimethoate adsorption measurements, multiple linear regression models were made to reliably predict performance towards dimethoate removal from water. These models can be used to quickly screen among larger sets of possible adsorbents and guide the development of novel, highly efficient adsorbents for dimethoate removal from water. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
T2  - Molecules
T1  - Viscose-Derived Activated Carbons Fibers as Highly Efficient Adsorbents for Dimethoate Removal from Water
VL  - 27
IS  - 5
SP  - 1477
DO  - 10.3390/molecules27051477
ER  - 

@article{
author = "Jocić, Ana and Breitenbach, Stefan and Bajuk-Bogdanović, Danica V. and Pašti, Igor A. and Unterweger, Cristoph and Fürst, Christian and Lazarević-Pašti, Tamara",
year = "2022",
abstract = "Extensive use of pesticides resulting in their accumulation in the environment presents a hazard for their non-target species, including humans. Hence, efficient remediation strategies are needed, and, in this sense, adsorption is seen as the most straightforward approach. We have studied activated carbon fibers (ACFs) derived from viscose fibers impregnated with diammonium hydrogen phosphate (DAHP). By changing the amount of DAHP in the impregnation step, the chemical composition and textural properties of ACFs are effectively tuned, affecting their performance for dimethoate removal from water. The prepared ACFs effectively reduced the toxicity of treated water samples, both deionized water solutions and spiked tap water samples, under batch conditions and in dynamic filtration experiments. Using the results of physicochemical characterization and dimethoate adsorption measurements, multiple linear regression models were made to reliably predict performance towards dimethoate removal from water. These models can be used to quickly screen among larger sets of possible adsorbents and guide the development of novel, highly efficient adsorbents for dimethoate removal from water. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.",
journal = "Molecules",
title = "Viscose-Derived Activated Carbons Fibers as Highly Efficient Adsorbents for Dimethoate Removal from Water",
volume = "27",
number = "5",
pages = "1477",
doi = "10.3390/molecules27051477"
}

Jocić, A., Breitenbach, S., Bajuk-Bogdanović, D. V., Pašti, I. A., Unterweger, C., Fürst, C.,& Lazarević-Pašti, T.. (2022). Viscose-Derived Activated Carbons Fibers as Highly Efficient Adsorbents for Dimethoate Removal from Water. in Molecules, 27(5), 1477.
https://doi.org/10.3390/molecules27051477

Jocić A, Breitenbach S, Bajuk-Bogdanović DV, Pašti IA, Unterweger C, Fürst C, Lazarević-Pašti T. Viscose-Derived Activated Carbons Fibers as Highly Efficient Adsorbents for Dimethoate Removal from Water. in Molecules. 2022;27(5):1477.
doi:10.3390/molecules27051477 .

Jocić, Ana, Breitenbach, Stefan, Bajuk-Bogdanović, Danica V., Pašti, Igor A., Unterweger, Cristoph, Fürst, Christian, Lazarević-Pašti, Tamara, "Viscose-Derived Activated Carbons Fibers as Highly Efficient Adsorbents for Dimethoate Removal from Water" in Molecules, 27, no. 5 (2022):1477,
https://doi.org/10.3390/molecules27051477 . .

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  - JOUR
AU  - Pagnacco, Maja C.
AU  - Maksimović, Jelena P.
AU  - Nikolić, Nenad T.
AU  - Bajuk Bogdanović, Danica V.
AU  - Kragović, Milan M.
AU  - Stojmenović, Marija
AU  - Blagojević, Stevan N.
AU  - Senćanski, Jelena
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10400
AB  - Indigo carmine is a commonly used industrial blue dye. To determine its concentration in a commercially available food dye composed of a mixture of indigo carmine and D-glucose, this paper characterizes it through (ATR, KBr) FTIR micro-Raman as well as UV/Vis and clock: Briggs–Rauscher (BR) oscillatory reaction methods. The indigo carmine was detected in the bulk food dye only by applying micro-Raman spectroscopy, indicating a low percentage of the indigo carmine present. This research provides an improvement in the deviations from the experimental Raman spectrum as calculated by the B97D/cc-pVTZ level of theory one, resulting in a better geometrical optimization of the indigo carmine molecule compared to data within the literature. The analytical curves used to determine indigo carmine concentrations (and quantities) in an aqueous solution of food dye were applied by means of UV/Vis and BR methods. BR yielded significantly better analytical parameters: 100 times lower LOD and LOQ compared to commonly used UV/Vis. The remarkable sensitivity of the BR reaction towards indigo carmine suggests that not only does indigo carmine react in an oscillatory reaction but also its decomposition products, meaning that the multiple oxidation reactions have an important role in the BR’s indigo carmine mechanism. The novelty of this research is the investigation of indigo carmine using a clock BR reaction, opening new possibilities to determine indigo carmine in other complex samples (pharmaceutical, food, etc.).
T2  - Molecules
T1  - Indigo Carmine in a Food Dye: Spectroscopic Characterization and Determining Its Micro-Concentration through the Clock Reaction
VL  - 27
IS  - 15
SP  - 4853
DO  - 10.3390/molecules27154853
ER  - 

@article{
author = "Pagnacco, Maja C. and Maksimović, Jelena P. and Nikolić, Nenad T. and Bajuk Bogdanović, Danica V. and Kragović, Milan M. and Stojmenović, Marija and Blagojević, Stevan N. and Senćanski, Jelena",
year = "2022",
abstract = "Indigo carmine is a commonly used industrial blue dye. To determine its concentration in a commercially available food dye composed of a mixture of indigo carmine and D-glucose, this paper characterizes it through (ATR, KBr) FTIR micro-Raman as well as UV/Vis and clock: Briggs–Rauscher (BR) oscillatory reaction methods. The indigo carmine was detected in the bulk food dye only by applying micro-Raman spectroscopy, indicating a low percentage of the indigo carmine present. This research provides an improvement in the deviations from the experimental Raman spectrum as calculated by the B97D/cc-pVTZ level of theory one, resulting in a better geometrical optimization of the indigo carmine molecule compared to data within the literature. The analytical curves used to determine indigo carmine concentrations (and quantities) in an aqueous solution of food dye were applied by means of UV/Vis and BR methods. BR yielded significantly better analytical parameters: 100 times lower LOD and LOQ compared to commonly used UV/Vis. The remarkable sensitivity of the BR reaction towards indigo carmine suggests that not only does indigo carmine react in an oscillatory reaction but also its decomposition products, meaning that the multiple oxidation reactions have an important role in the BR’s indigo carmine mechanism. The novelty of this research is the investigation of indigo carmine using a clock BR reaction, opening new possibilities to determine indigo carmine in other complex samples (pharmaceutical, food, etc.).",
journal = "Molecules",
title = "Indigo Carmine in a Food Dye: Spectroscopic Characterization and Determining Its Micro-Concentration through the Clock Reaction",
volume = "27",
number = "15",
pages = "4853",
doi = "10.3390/molecules27154853"
}

Pagnacco, M. C., Maksimović, J. P., Nikolić, N. T., Bajuk Bogdanović, D. V., Kragović, M. M., Stojmenović, M., Blagojević, S. N.,& Senćanski, J.. (2022). Indigo Carmine in a Food Dye: Spectroscopic Characterization and Determining Its Micro-Concentration through the Clock Reaction. in Molecules, 27(15), 4853.
https://doi.org/10.3390/molecules27154853

Pagnacco MC, Maksimović JP, Nikolić NT, Bajuk Bogdanović DV, Kragović MM, Stojmenović M, Blagojević SN, Senćanski J. Indigo Carmine in a Food Dye: Spectroscopic Characterization and Determining Its Micro-Concentration through the Clock Reaction. in Molecules. 2022;27(15):4853.
doi:10.3390/molecules27154853 .

Pagnacco, Maja C., Maksimović, Jelena P., Nikolić, Nenad T., Bajuk Bogdanović, Danica V., Kragović, Milan M., Stojmenović, Marija, Blagojević, Stevan N., Senćanski, Jelena, "Indigo Carmine in a Food Dye: Spectroscopic Characterization and Determining Its Micro-Concentration through the Clock Reaction" in Molecules, 27, no. 15 (2022):4853,
https://doi.org/10.3390/molecules27154853 . .

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  - Janošević-Ležaić, Aleksandra
AU  - Bajuk-Bogdanović, Danica V.
AU  - Krstić, Jugoslav B.
AU  - Jovanović, Zoran
AU  - Mravik, Željko
AU  - Kovač, Janez
AU  - Gavrilov, Nemanja
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10213
AB  - Transformation of tannic acid (TA), a cheap, abundant and environmentally friendly (by)product, upon carbonization at various temperatures was examined as it is extensively being used in energy storing devices. In addition of reviling what is happening with TA upon carbonization, a step further has been taken to scrutinize the role of carbonized TA (CTA) playing in energy storage composites. Increasing the carbonization temperature from 500 ◦C to 800 ◦C led to a nine orders of magnitude increase in conductivity, from 9⋅10–9 S cm
T2  - Fuel
T1  - What role does carbonized tannic acid play in energy storage composites?
VL  - 312
DO  - 10.1016/j.fuel.2021.122930
ER  - 

@article{
author = "Janošević-Ležaić, Aleksandra and Bajuk-Bogdanović, Danica V. and Krstić, Jugoslav B. and Jovanović, Zoran and Mravik, Željko and Kovač, Janez and Gavrilov, Nemanja",
year = "2022",
abstract = "Transformation of tannic acid (TA), a cheap, abundant and environmentally friendly (by)product, upon carbonization at various temperatures was examined as it is extensively being used in energy storing devices. In addition of reviling what is happening with TA upon carbonization, a step further has been taken to scrutinize the role of carbonized TA (CTA) playing in energy storage composites. Increasing the carbonization temperature from 500 ◦C to 800 ◦C led to a nine orders of magnitude increase in conductivity, from 9⋅10–9 S cm",
journal = "Fuel",
title = "What role does carbonized tannic acid play in energy storage composites?",
volume = "312",
doi = "10.1016/j.fuel.2021.122930"
}

Janošević-Ležaić, A., Bajuk-Bogdanović, D. V., Krstić, J. B., Jovanović, Z., Mravik, Ž., Kovač, J.,& Gavrilov, N.. (2022). What role does carbonized tannic acid play in energy storage composites?. in Fuel, 312.
https://doi.org/10.1016/j.fuel.2021.122930

Janošević-Ležaić A, Bajuk-Bogdanović DV, Krstić JB, Jovanović Z, Mravik Ž, Kovač J, Gavrilov N. What role does carbonized tannic acid play in energy storage composites?. in Fuel. 2022;312.
doi:10.1016/j.fuel.2021.122930 .

Janošević-Ležaić, Aleksandra, Bajuk-Bogdanović, Danica V., Krstić, Jugoslav B., Jovanović, Zoran, Mravik, Željko, Kovač, Janez, Gavrilov, Nemanja, "What role does carbonized tannic acid play in energy storage composites?" in Fuel, 312 (2022),
https://doi.org/10.1016/j.fuel.2021.122930 . .

TY  - JOUR
AU  - Kepić, Dejan P.
AU  - Kleut, Duška
AU  - Marković, Zoran M.
AU  - Bajuk-Bogdanović, Danica V.
AU  - Pavlović, Vladimir B.
AU  - Krmpot, Aleksandar
AU  - Lekić, Marina
AU  - Jovanović, Dragana J.
AU  - Todorović-Marković, Biljana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9568
AB  - Graphene is an excellent material to anchor metal nanoparticles due to its large surface area. In this paper, we report the use of electrochemically exfoliated graphene as support to anchor gold nanoparticles (Au NPs). Au NPs are synthesized via the reduction of chloroauric acid under gamma irradiation at low doses of 1, 5, and 10 kGy and directly deposited onto the graphene surface, making this procedure simple and fast. Good water dispersibility of exfoliated graphene, due to the presence of oxygen-containing functional groups in the structure of graphene, provides long-term stability of Au NPs - graphene composite dispersions. The majority of the Au NPs obtained by this method have sizes of up to 40 nm, while the increase in the applied dose leads to an increase in the amount of smaller nanoparticles. The increase of temperature of the prepared composite material upon irradiation with an 808 nm continuous wave laser was monitored. All samples show a temperature increase between 21.5 and 25.6 °C for 10 min of the laser exposure, which indicates that Au NPs - graphene composite can effectively be used in photothermal treatment for cancer therapy. © 2021 Elsevier Inc.
T2  - Materials Characterization
T1  - One-step preparation of gold nanoparticles - exfoliated graphene composite by gamma irradiation at low doses for photothermal therapy applications
VL  - 173
SP  - 110944
DO  - 10.1016/j.matchar.2021.110944
ER  - 

@article{
author = "Kepić, Dejan P. and Kleut, Duška and Marković, Zoran M. and Bajuk-Bogdanović, Danica V. and Pavlović, Vladimir B. and Krmpot, Aleksandar and Lekić, Marina and Jovanović, Dragana J. and Todorović-Marković, Biljana",
year = "2021",
abstract = "Graphene is an excellent material to anchor metal nanoparticles due to its large surface area. In this paper, we report the use of electrochemically exfoliated graphene as support to anchor gold nanoparticles (Au NPs). Au NPs are synthesized via the reduction of chloroauric acid under gamma irradiation at low doses of 1, 5, and 10 kGy and directly deposited onto the graphene surface, making this procedure simple and fast. Good water dispersibility of exfoliated graphene, due to the presence of oxygen-containing functional groups in the structure of graphene, provides long-term stability of Au NPs - graphene composite dispersions. The majority of the Au NPs obtained by this method have sizes of up to 40 nm, while the increase in the applied dose leads to an increase in the amount of smaller nanoparticles. The increase of temperature of the prepared composite material upon irradiation with an 808 nm continuous wave laser was monitored. All samples show a temperature increase between 21.5 and 25.6 °C for 10 min of the laser exposure, which indicates that Au NPs - graphene composite can effectively be used in photothermal treatment for cancer therapy. © 2021 Elsevier Inc.",
journal = "Materials Characterization",
title = "One-step preparation of gold nanoparticles - exfoliated graphene composite by gamma irradiation at low doses for photothermal therapy applications",
volume = "173",
pages = "110944",
doi = "10.1016/j.matchar.2021.110944"
}

Kepić, D. P., Kleut, D., Marković, Z. M., Bajuk-Bogdanović, D. V., Pavlović, V. B., Krmpot, A., Lekić, M., Jovanović, D. J.,& Todorović-Marković, B.. (2021). One-step preparation of gold nanoparticles - exfoliated graphene composite by gamma irradiation at low doses for photothermal therapy applications. in Materials Characterization, 173, 110944.
https://doi.org/10.1016/j.matchar.2021.110944

Kepić DP, Kleut D, Marković ZM, Bajuk-Bogdanović DV, Pavlović VB, Krmpot A, Lekić M, Jovanović DJ, Todorović-Marković B. One-step preparation of gold nanoparticles - exfoliated graphene composite by gamma irradiation at low doses for photothermal therapy applications. in Materials Characterization. 2021;173:110944.
doi:10.1016/j.matchar.2021.110944 .

Kepić, Dejan P., Kleut, Duška, Marković, Zoran M., Bajuk-Bogdanović, Danica V., Pavlović, Vladimir B., Krmpot, Aleksandar, Lekić, Marina, Jovanović, Dragana J., Todorović-Marković, Biljana, "One-step preparation of gold nanoparticles - exfoliated graphene composite by gamma irradiation at low doses for photothermal therapy applications" in Materials Characterization, 173 (2021):110944,
https://doi.org/10.1016/j.matchar.2021.110944 . .

TY  - CONF
AU  - Gloginjić, Marko
AU  - Mravik, Željko
AU  - Bajuk-Bogdanović, Danica
AU  - Olejniczak, Andrzej
AU  - Skuratov, Vladimir A.
AU  - Pašti, Igor
AU  - Jovanović, Zoran
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12439
AB  - Surface oxygen groups may have a significant impact on the electrochemical charge storage properties of graphene oxide (GO). The presence of these groups on GO should be properly balanced so that electronic conductivity is optimized, while only the groups that are beneficial to capacitance are preserved. Ion beam irradiation can be identified as a technique where a controllable change of surface chemistry and structure of GO is possible through varying the energy and the fluence of an ion beam. In the present study, the influence of proton-beam irradiation on the surface chemistry and structural properties of GO paper was investigated. GO paper was irradiated with 15 keV proton-beam to fluences from 5×1016 to 2×1017 ions cm-2, while Fourier-transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy (RS) were used for the analysis of the surface chemistry and structural properties. Results indicate increasing reduction of surface oxygen groups and the preferential removal of the alkoxy and epoxy groups as fluence increased. Desorption of these basal plane groups was outlined in our previous work as important for charge storage capacity, probably due to conductivity increase [1]. When oxygen content was compared to: 1) relative areas of specific functional groups from FTIR and XPS and 2) parameters of Raman peaks, an interesting correlation was found that suggest optimal fluences for tuning the surface chemistry and structural properties of GO. Modification of surface chemistry originates from the physical and chemical effects of ion beam irradiation which were also investigated theoretically. The interaction of functional groups with H-atom was investigated using DFT and semi-empirical (SE) approach. SE calculations revealed that the chemical reduction of the epoxy group appears at H-atom energies below 1.5 eV. Results indicate that ion-beam irradiation can be used for controllable modification of surface chemistry of GO where the applied fluence can be used for tuning the degree of change, which may have implications to electrochemical charge storage properties.
PB  - Belgrade : Faculty of Physical Chemistry
C3  - 4IMMSERA : The 4th International Conference on Materials Science for Energy Related Applications : Book of abstracts
T1  - Modification of surface oxygen groups of graphene oxide by ion beam irradiation for supercapacitor applications
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12439
ER  - 

@conference{
author = "Gloginjić, Marko and Mravik, Željko and Bajuk-Bogdanović, Danica and Olejniczak, Andrzej and Skuratov, Vladimir A. and Pašti, Igor and Jovanović, Zoran",
year = "2021",
abstract = "Surface oxygen groups may have a significant impact on the electrochemical charge storage properties of graphene oxide (GO). The presence of these groups on GO should be properly balanced so that electronic conductivity is optimized, while only the groups that are beneficial to capacitance are preserved. Ion beam irradiation can be identified as a technique where a controllable change of surface chemistry and structure of GO is possible through varying the energy and the fluence of an ion beam. In the present study, the influence of proton-beam irradiation on the surface chemistry and structural properties of GO paper was investigated. GO paper was irradiated with 15 keV proton-beam to fluences from 5×1016 to 2×1017 ions cm-2, while Fourier-transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy (RS) were used for the analysis of the surface chemistry and structural properties. Results indicate increasing reduction of surface oxygen groups and the preferential removal of the alkoxy and epoxy groups as fluence increased. Desorption of these basal plane groups was outlined in our previous work as important for charge storage capacity, probably due to conductivity increase [1]. When oxygen content was compared to: 1) relative areas of specific functional groups from FTIR and XPS and 2) parameters of Raman peaks, an interesting correlation was found that suggest optimal fluences for tuning the surface chemistry and structural properties of GO. Modification of surface chemistry originates from the physical and chemical effects of ion beam irradiation which were also investigated theoretically. The interaction of functional groups with H-atom was investigated using DFT and semi-empirical (SE) approach. SE calculations revealed that the chemical reduction of the epoxy group appears at H-atom energies below 1.5 eV. Results indicate that ion-beam irradiation can be used for controllable modification of surface chemistry of GO where the applied fluence can be used for tuning the degree of change, which may have implications to electrochemical charge storage properties.",
publisher = "Belgrade : Faculty of Physical Chemistry",
journal = "4IMMSERA : The 4th International Conference on Materials Science for Energy Related Applications : Book of abstracts",
title = "Modification of surface oxygen groups of graphene oxide by ion beam irradiation for supercapacitor applications",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12439"
}

Gloginjić, M., Mravik, Ž., Bajuk-Bogdanović, D., Olejniczak, A., Skuratov, V. A., Pašti, I.,& Jovanović, Z.. (2021). Modification of surface oxygen groups of graphene oxide by ion beam irradiation for supercapacitor applications. in 4IMMSERA : The 4th International Conference on Materials Science for Energy Related Applications : Book of abstracts
Belgrade : Faculty of Physical Chemistry..
https://hdl.handle.net/21.15107/rcub_vinar_12439

Gloginjić M, Mravik Ž, Bajuk-Bogdanović D, Olejniczak A, Skuratov VA, Pašti I, Jovanović Z. Modification of surface oxygen groups of graphene oxide by ion beam irradiation for supercapacitor applications. in 4IMMSERA : The 4th International Conference on Materials Science for Energy Related Applications : Book of abstracts. 2021;.
https://hdl.handle.net/21.15107/rcub_vinar_12439 .

Gloginjić, Marko, Mravik, Željko, Bajuk-Bogdanović, Danica, Olejniczak, Andrzej, Skuratov, Vladimir A., Pašti, Igor, Jovanović, Zoran, "Modification of surface oxygen groups of graphene oxide by ion beam irradiation for supercapacitor applications" in 4IMMSERA : The 4th International Conference on Materials Science for Energy Related Applications : Book of abstracts (2021),
https://hdl.handle.net/21.15107/rcub_vinar_12439 .

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 .