Physics and Chemistry with Ion Beams

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Physics and Chemistry with Ion Beams (en)
Физика и хемија са јонским сноповима (sr)
Fizika i hemija sa jonskim snopovima (sr_RS)
Authors

Publications

Structural and electrochemical properties of carbon ion beam irradiated 12-tungstophosphoric acid

Mravik, Željko; Bajuk-Bogdanović, Danica V.; Mraković, Ana Đ.; Vukosavljević, Ljubiša; Trajić, Ivan; Kovač, Janez; Peruško, Davor; Gavrilov, Nemanja; Jovanović, Zoran M.

(2021)

TY  - JOUR
AU  - Mravik, Željko
AU  - Bajuk-Bogdanović, Danica V.
AU  - Mraković, Ana Đ.
AU  - Vukosavljević, Ljubiša
AU  - Trajić, Ivan
AU  - Kovač, Janez
AU  - Peruško, Davor
AU  - Gavrilov, Nemanja
AU  - Jovanović, Zoran M.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9150
AB  - In recent years polyoxometalates (POMs) have attracted significant research interest due to versatile properties. These properties are determined by the size, structure and elemental composition of POMs and hence play an important role in their application. In the present study, the ion beam irradiation (10 keV C+ ions, 5 × 1014–2.5 × 1015 ions/cm2) has been utilized for modification of physicochemical properties of 120 nm-thick layer of 12-tungstophosphoric acid (WPA). Scanning electron microscopy analysis of irradiated films showed change of morphology i.e. an increase of WPA grain size with irradiation and coalescence of grains at the highest fluence. This was accompanied by structural changes. Attenuated total reflectance Fourier transform infrared analysis revealed that vibration bands of Keggin anion became less pronounced as fluence increased, while Raman spectra appeared as strongly modified. The effect of irradiation with 1.25 × 1015 ions/cm2 on the structure of WPA was similar to the effect of thermal treatment at 600 °C. Irradiation of WPA led to decrease of the band gap (from 4.07 to 3.92 eV), which was correlated to transformation Keggin anions into a network of WO6 octahedra and PO4 tetrahedra. This is in line with increased number of W=Od bonds observed by UV–Visible diffuse reflectance spectroscopy. Beside transformation to bronzes a reduction of WPA was observed by X-ray Photoelectron Spectroscopy (shift to lower binding energy) and Raman methods, whereas the Raman spectra of irradiated samples were similar to heteropoly blue. The electrochemical properties of irradiated WPA were also assessed. Cyclic voltammetry measurements showed that at up to 1.25 × 1015 ions/cm2 lithiation capacity of WPA increases and activity for hydrogen evolution reaction (HER) improves. The highest fluence caused interconnection of WO6 octahedra, closing of lithiation pathways and decrease in the number of active sites for HER. Our results provide a novel insight into the effects of ion beam irradiation on WPA and demonstrate high potential for tuning of physicochemical properties of POMs that are relevant in wide range of applications. © 2021 Elsevier Ltd
T2  - Radiation Physics and Chemistry
T1  - Structural and electrochemical properties of carbon ion beam irradiated 12-tungstophosphoric acid
VL  - 183
SP  - 109422
DO  - 10.1016/j.radphyschem.2021.109422
ER  - 
@article{
author = "Mravik, Željko and Bajuk-Bogdanović, Danica V. and Mraković, Ana Đ. and Vukosavljević, Ljubiša and Trajić, Ivan and Kovač, Janez and Peruško, Davor and Gavrilov, Nemanja and Jovanović, Zoran M.",
year = "2021",
abstract = "In recent years polyoxometalates (POMs) have attracted significant research interest due to versatile properties. These properties are determined by the size, structure and elemental composition of POMs and hence play an important role in their application. In the present study, the ion beam irradiation (10 keV C+ ions, 5 × 1014–2.5 × 1015 ions/cm2) has been utilized for modification of physicochemical properties of 120 nm-thick layer of 12-tungstophosphoric acid (WPA). Scanning electron microscopy analysis of irradiated films showed change of morphology i.e. an increase of WPA grain size with irradiation and coalescence of grains at the highest fluence. This was accompanied by structural changes. Attenuated total reflectance Fourier transform infrared analysis revealed that vibration bands of Keggin anion became less pronounced as fluence increased, while Raman spectra appeared as strongly modified. The effect of irradiation with 1.25 × 1015 ions/cm2 on the structure of WPA was similar to the effect of thermal treatment at 600 °C. Irradiation of WPA led to decrease of the band gap (from 4.07 to 3.92 eV), which was correlated to transformation Keggin anions into a network of WO6 octahedra and PO4 tetrahedra. This is in line with increased number of W=Od bonds observed by UV–Visible diffuse reflectance spectroscopy. Beside transformation to bronzes a reduction of WPA was observed by X-ray Photoelectron Spectroscopy (shift to lower binding energy) and Raman methods, whereas the Raman spectra of irradiated samples were similar to heteropoly blue. The electrochemical properties of irradiated WPA were also assessed. Cyclic voltammetry measurements showed that at up to 1.25 × 1015 ions/cm2 lithiation capacity of WPA increases and activity for hydrogen evolution reaction (HER) improves. The highest fluence caused interconnection of WO6 octahedra, closing of lithiation pathways and decrease in the number of active sites for HER. Our results provide a novel insight into the effects of ion beam irradiation on WPA and demonstrate high potential for tuning of physicochemical properties of POMs that are relevant in wide range of applications. © 2021 Elsevier Ltd",
journal = "Radiation Physics and Chemistry",
title = "Structural and electrochemical properties of carbon ion beam irradiated 12-tungstophosphoric acid",
volume = "183",
pages = "109422",
doi = "10.1016/j.radphyschem.2021.109422"
}
Mravik, Ž., Bajuk-Bogdanović, D. V., Mraković, A. Đ., Vukosavljević, L., Trajić, I., Kovač, J., Peruško, D., Gavrilov, N.,& Jovanović, Z. M.. (2021). Structural and electrochemical properties of carbon ion beam irradiated 12-tungstophosphoric acid. in Radiation Physics and Chemistry, 183, 109422.
https://doi.org/10.1016/j.radphyschem.2021.109422
Mravik Ž, Bajuk-Bogdanović DV, Mraković AĐ, Vukosavljević L, Trajić I, Kovač J, Peruško D, Gavrilov N, Jovanović ZM. Structural and electrochemical properties of carbon ion beam irradiated 12-tungstophosphoric acid. in Radiation Physics and Chemistry. 2021;183:109422.
doi:10.1016/j.radphyschem.2021.109422 .
Mravik, Željko, Bajuk-Bogdanović, Danica V., Mraković, Ana Đ., Vukosavljević, Ljubiša, Trajić, Ivan, Kovač, Janez, Peruško, Davor, Gavrilov, Nemanja, Jovanović, Zoran M., "Structural and electrochemical properties of carbon ion beam irradiated 12-tungstophosphoric acid" in Radiation Physics and Chemistry, 183 (2021):109422,
https://doi.org/10.1016/j.radphyschem.2021.109422 . .

DFT study of boron doped MgH2: Bonding mechanism, hydrogen diffusion and desorption

Kurko, Sandra V.; Paskaš Mamula, Bojana; Rmuš, Jelena; Grbović-Novaković, Jasmina; Novaković, Nikola

(2020)

TY  - JOUR
AU  - Kurko, Sandra V.
AU  - Paskaš Mamula, Bojana
AU  - Rmuš, Jelena
AU  - Grbović-Novaković, Jasmina
AU  - Novaković, Nikola
PY  - 2020
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8560
AB  - The impact of boron doping on MgH2 bonding mechanism, hydrogen diffusion and desorption was calculated using density functional theory (DFT). Atomic interactions in doped and non-doped system and its influence on hydrogen and vacancy diffusion were studied in bulk hydride. Slab calculations were performed to study hydrogen desorption energies from (110) boron doped surface and its dependence on the surface configuration and depth position. To study kinetics of hydrogen diffusion in boron vicinity and hydrogen molecule desorption activation energies from boron doped and non-doped (110) MgH2 surface Nudged Elastic Band (NEB) method was used. Results showed that boron forms stronger, covalent bonds with hydrogen causing the destabilization in its first and second coordination. This leads to lower hydrogen desorption energies and improved hydrogen diffusion, while the impact on the energy barriers for H2 desorption from hydride (110) surface is less pronounced. © 2019 Hydrogen Energy Publications LLC
T2  - International Journal of Hydrogen Energy
T1  - DFT study of boron doped MgH2: Bonding mechanism, hydrogen diffusion and desorption
VL  - 45
IS  - 14
SP  - 7947
EP  - 7957
DO  - 10.1016/j.ijhydene.2019.05.015
ER  - 
@article{
author = "Kurko, Sandra V. and Paskaš Mamula, Bojana and Rmuš, Jelena and Grbović-Novaković, Jasmina and Novaković, Nikola",
year = "2020",
abstract = "The impact of boron doping on MgH2 bonding mechanism, hydrogen diffusion and desorption was calculated using density functional theory (DFT). Atomic interactions in doped and non-doped system and its influence on hydrogen and vacancy diffusion were studied in bulk hydride. Slab calculations were performed to study hydrogen desorption energies from (110) boron doped surface and its dependence on the surface configuration and depth position. To study kinetics of hydrogen diffusion in boron vicinity and hydrogen molecule desorption activation energies from boron doped and non-doped (110) MgH2 surface Nudged Elastic Band (NEB) method was used. Results showed that boron forms stronger, covalent bonds with hydrogen causing the destabilization in its first and second coordination. This leads to lower hydrogen desorption energies and improved hydrogen diffusion, while the impact on the energy barriers for H2 desorption from hydride (110) surface is less pronounced. © 2019 Hydrogen Energy Publications LLC",
journal = "International Journal of Hydrogen Energy",
title = "DFT study of boron doped MgH2: Bonding mechanism, hydrogen diffusion and desorption",
volume = "45",
number = "14",
pages = "7947-7957",
doi = "10.1016/j.ijhydene.2019.05.015"
}
Kurko, S. V., Paskaš Mamula, B., Rmuš, J., Grbović-Novaković, J.,& Novaković, N.. (2020). DFT study of boron doped MgH2: Bonding mechanism, hydrogen diffusion and desorption. in International Journal of Hydrogen Energy, 45(14), 7947-7957.
https://doi.org/10.1016/j.ijhydene.2019.05.015
Kurko SV, Paskaš Mamula B, Rmuš J, Grbović-Novaković J, Novaković N. DFT study of boron doped MgH2: Bonding mechanism, hydrogen diffusion and desorption. in International Journal of Hydrogen Energy. 2020;45(14):7947-7957.
doi:10.1016/j.ijhydene.2019.05.015 .
Kurko, Sandra V., Paskaš Mamula, Bojana, Rmuš, Jelena, Grbović-Novaković, Jasmina, Novaković, Nikola, "DFT study of boron doped MgH2: Bonding mechanism, hydrogen diffusion and desorption" in International Journal of Hydrogen Energy, 45, no. 14 (2020):7947-7957,
https://doi.org/10.1016/j.ijhydene.2019.05.015 . .
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11

Sixth-century AD glassware from Jelica, Serbia — an increasingly complex picture of late antiquity glass composition

Balvanović, Roman V.; Šmit, Žiga

(2020)

TY  - JOUR
AU  - Balvanović, Roman V.
AU  - Šmit, Žiga
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8933
AB  - In this paper, the chemical analyses of forty-two samples of glassware from the sixth to early seventh century AD Byzantine settlement of Gradina on Jelica, Serbia are reported, completing the previous study of forty windowpane samples from the same site. Apart from a single plant ash glass, all other glasses are natron-based, classified as Foy 2.1 (thirty-four), Foy 3.2 (six), and Roman (two). The ten colourless glasses from the assemblage are decolourised with manganese. Five glasses are intentionally coloured blue with cobalt and copper, one black with iron. Four blue glasses are opacified, one with antimony, one perhaps with tin. Some Jelica glass finds classified as Foy 3.2 are specific for having magnesium levels above those characteristic for série 3.2. Jelica glasses assigned to Foy 2.1 group were further divided into low iron (twenty), high iron (four), and very high iron (six) subgroups. The overall compositional pattern of Jelica samples identified as Foy 2.1 suggest that different sands with different heavy mineral suites and sources of lime were used in their making, as well as different levels of recycling. Our findings indicate that the reasons for the compositional blurring of Foy 3.2 and Foy 2.1 are not limited to technological reasons such as recycling, but also include variations in the sand minerals. The results support the picture of the dominance of Foy 2.1 and Foy 3.2 types of glass in central and eastern Balkans and on the Macedonian-Thracian coast during the sixth century AD. Our findings, together with the apparent absence of Levantine glass from this region reported until now, suggest that different trade routes were supplying these regions with Eastern Mediterranean raw glass from those supplying Adriatic Sea coasts.
T2  - Archaeological and Anthropological Sciences
T1  - Sixth-century AD glassware from Jelica, Serbia — an increasingly complex picture of late antiquity glass composition
VL  - 12
IS  - 4
SP  - 94
DO  - 10.1007/s12520-020-01031-3
ER  - 
@article{
author = "Balvanović, Roman V. and Šmit, Žiga",
year = "2020",
abstract = "In this paper, the chemical analyses of forty-two samples of glassware from the sixth to early seventh century AD Byzantine settlement of Gradina on Jelica, Serbia are reported, completing the previous study of forty windowpane samples from the same site. Apart from a single plant ash glass, all other glasses are natron-based, classified as Foy 2.1 (thirty-four), Foy 3.2 (six), and Roman (two). The ten colourless glasses from the assemblage are decolourised with manganese. Five glasses are intentionally coloured blue with cobalt and copper, one black with iron. Four blue glasses are opacified, one with antimony, one perhaps with tin. Some Jelica glass finds classified as Foy 3.2 are specific for having magnesium levels above those characteristic for série 3.2. Jelica glasses assigned to Foy 2.1 group were further divided into low iron (twenty), high iron (four), and very high iron (six) subgroups. The overall compositional pattern of Jelica samples identified as Foy 2.1 suggest that different sands with different heavy mineral suites and sources of lime were used in their making, as well as different levels of recycling. Our findings indicate that the reasons for the compositional blurring of Foy 3.2 and Foy 2.1 are not limited to technological reasons such as recycling, but also include variations in the sand minerals. The results support the picture of the dominance of Foy 2.1 and Foy 3.2 types of glass in central and eastern Balkans and on the Macedonian-Thracian coast during the sixth century AD. Our findings, together with the apparent absence of Levantine glass from this region reported until now, suggest that different trade routes were supplying these regions with Eastern Mediterranean raw glass from those supplying Adriatic Sea coasts.",
journal = "Archaeological and Anthropological Sciences",
title = "Sixth-century AD glassware from Jelica, Serbia — an increasingly complex picture of late antiquity glass composition",
volume = "12",
number = "4",
pages = "94",
doi = "10.1007/s12520-020-01031-3"
}
Balvanović, R. V.,& Šmit, Ž.. (2020). Sixth-century AD glassware from Jelica, Serbia — an increasingly complex picture of late antiquity glass composition. in Archaeological and Anthropological Sciences, 12(4), 94.
https://doi.org/10.1007/s12520-020-01031-3
Balvanović RV, Šmit Ž. Sixth-century AD glassware from Jelica, Serbia — an increasingly complex picture of late antiquity glass composition. in Archaeological and Anthropological Sciences. 2020;12(4):94.
doi:10.1007/s12520-020-01031-3 .
Balvanović, Roman V., Šmit, Žiga, "Sixth-century AD glassware from Jelica, Serbia — an increasingly complex picture of late antiquity glass composition" in Archaeological and Anthropological Sciences, 12, no. 4 (2020):94,
https://doi.org/10.1007/s12520-020-01031-3 . .
2
1
1

Self-limiting interactions in 2D–0D systems: A case study of graphene oxide and 12-tungstophosphoric acid nanocomposite

Jovanović, Zoran M.; Mravik, Željko; Bajuk-Bogdanović, Danica V.; Jovanović, Sonja; Marković, Smilja; Vujković, Milica; Kovač, Janez; Vengust, Damjan; Uskoković-Marković, Snežana; Holclajtner-Antunović, Ivanka D.

(2020)

TY  - JOUR
AU  - Jovanović, Zoran M.
AU  - Mravik, Željko
AU  - Bajuk-Bogdanović, Danica V.
AU  - Jovanović, Sonja
AU  - Marković, Smilja
AU  - Vujković, Milica
AU  - Kovač, Janez
AU  - Vengust, Damjan
AU  - Uskoković-Marković, Snežana
AU  - Holclajtner-Antunović, Ivanka D.
PY  - 2020
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8520
AB  - In the present study we investigated the interaction between 12-tungstophosphoric acid (WPA) and graphene oxide (GO) in their nanocomposite by utilizing the loading of WPA as an intrinsic parameter for interaction tuning. The Fourier-transform infrared spectroscopy, temperature-programmed desorption, X-ray photoelectron spectroscopy, zeta-potential measurements, thermogravimetric analysis, X-ray diffraction, Raman spectroscopy and transmission electron microscopy methods revealed that ∼5–13 wt% of WPA represents critical loading that separates two distinct contributions to GO-WPA interaction. This was explained by the self-limiting nature of GO-WPA interaction, initially controlled by high dispersion of WPA on GO (up to 13 wt%), that is eventually overpowered by WPA-WPA interaction as loading increases. As a result, the WPA agglomerates are being formed because of which the hybrid character of the nanocomposite diminishes, i.e., the properties of independent components start to be manifested to greater extent. The obtained results provide an important framework for considering possible outcomes in other 2D-0D systems, whose interaction is relevant both from fundamental and applicative point of view. Thus, the GO/WPA nanocomposite illustrates how the interactions between the components can be used for tuning the properties of nanocomposite as a whole. © 2019 Elsevier Ltd
T2  - Carbon
T1  - Self-limiting interactions in 2D–0D systems: A case study of graphene oxide and 12-tungstophosphoric acid nanocomposite
VL  - 156
SP  - 166
EP  - 178
DO  - 10.1016/j.carbon.2019.09.072
ER  - 
@article{
author = "Jovanović, Zoran M. and Mravik, Željko and Bajuk-Bogdanović, Danica V. and Jovanović, Sonja and Marković, Smilja and Vujković, Milica and Kovač, Janez and Vengust, Damjan and Uskoković-Marković, Snežana and Holclajtner-Antunović, Ivanka D.",
year = "2020",
abstract = "In the present study we investigated the interaction between 12-tungstophosphoric acid (WPA) and graphene oxide (GO) in their nanocomposite by utilizing the loading of WPA as an intrinsic parameter for interaction tuning. The Fourier-transform infrared spectroscopy, temperature-programmed desorption, X-ray photoelectron spectroscopy, zeta-potential measurements, thermogravimetric analysis, X-ray diffraction, Raman spectroscopy and transmission electron microscopy methods revealed that ∼5–13 wt% of WPA represents critical loading that separates two distinct contributions to GO-WPA interaction. This was explained by the self-limiting nature of GO-WPA interaction, initially controlled by high dispersion of WPA on GO (up to 13 wt%), that is eventually overpowered by WPA-WPA interaction as loading increases. As a result, the WPA agglomerates are being formed because of which the hybrid character of the nanocomposite diminishes, i.e., the properties of independent components start to be manifested to greater extent. The obtained results provide an important framework for considering possible outcomes in other 2D-0D systems, whose interaction is relevant both from fundamental and applicative point of view. Thus, the GO/WPA nanocomposite illustrates how the interactions between the components can be used for tuning the properties of nanocomposite as a whole. © 2019 Elsevier Ltd",
journal = "Carbon",
title = "Self-limiting interactions in 2D–0D systems: A case study of graphene oxide and 12-tungstophosphoric acid nanocomposite",
volume = "156",
pages = "166-178",
doi = "10.1016/j.carbon.2019.09.072"
}
Jovanović, Z. M., Mravik, Ž., Bajuk-Bogdanović, D. V., Jovanović, S., Marković, S., Vujković, M., Kovač, J., Vengust, D., Uskoković-Marković, S.,& Holclajtner-Antunović, I. D.. (2020). Self-limiting interactions in 2D–0D systems: A case study of graphene oxide and 12-tungstophosphoric acid nanocomposite. in Carbon, 156, 166-178.
https://doi.org/10.1016/j.carbon.2019.09.072
Jovanović ZM, Mravik Ž, Bajuk-Bogdanović DV, Jovanović S, Marković S, Vujković M, Kovač J, Vengust D, Uskoković-Marković S, Holclajtner-Antunović ID. Self-limiting interactions in 2D–0D systems: A case study of graphene oxide and 12-tungstophosphoric acid nanocomposite. in Carbon. 2020;156:166-178.
doi:10.1016/j.carbon.2019.09.072 .
Jovanović, Zoran M., Mravik, Željko, Bajuk-Bogdanović, Danica V., Jovanović, Sonja, Marković, Smilja, Vujković, Milica, Kovač, Janez, Vengust, Damjan, Uskoković-Marković, Snežana, Holclajtner-Antunović, Ivanka D., "Self-limiting interactions in 2D–0D systems: A case study of graphene oxide and 12-tungstophosphoric acid nanocomposite" in Carbon, 156 (2020):166-178,
https://doi.org/10.1016/j.carbon.2019.09.072 . .
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3
3

Composition, structure and potential energy application of nitrogen doped carbon cryogels

Kalijadis, Ana; Gavrilov, Nemanja M.; Jokić, Bojan M.; Gilić, Martina; Krstić, Aleksandar D.; Pašti, Igor A.; Babić, Biljana M.

(2020)

TY  - JOUR
AU  - Kalijadis, Ana
AU  - Gavrilov, Nemanja M.
AU  - Jokić, Bojan M.
AU  - Gilić, Martina
AU  - Krstić, Aleksandar D.
AU  - Pašti, Igor A.
AU  - Babić, Biljana M.
PY  - 2020
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8495
AB  - Resorcinol–formaldehyde (RF) cryogels were synthesized by sol–gel polycondensation of resorcinol with formaldehyde and freeze-drying was carried out with t-butanol. Carbon cryogel (CC) was obtained by pyrolyzing RF cryogels in an inert atmosphere to 950 °C. Nitrogen doped CCs (CCN) were synthesized by introducing melamine into RF precursor mixture solution to obtain nitrogen concentration 2, 6 and 10 wt.%. Material was characterized by elemental analysis, nitrogen adsorption– desorption measurements, scanning electron microscopy (SEM), Raman spectroscopy, FT-IR Spectroscopy. Cyclic voltammetry (CV) was used to investigate capacitive and electrocatalytic properties. Conductivity measurement was also performed. Elemental analysis results confirmed presence of nitrogen in CCN samples in the range from 0.45 to 1.15 wt.%. Raman spectroscopy of the samples showed increase of D and G peak integrated intensity ratio (ID/IG) with nitrogen doping suggesting that the structural disorder as well as edge plane density increase, but according to similar ID/IG values for CCN samples, their share is not directly related to the amount of incorporated N. Characterization by nitrogen adsorption showed that overall specific surface and maximum mesopores are achieved in CCN sample with medium nitrogen concentration. Results of cyclic voltammetry experiments demonstrated maximum capacitance for CCN sample with smallest N wt.% indicating that narrow pore size distribution and high specific surface area are dominant factors to achieve good capacitive behavior. The relatively low doping level of nitrogen reached in CCN samples may be the reason for the incomplete reduction of oxygen to hydroxide and furthermore it turned out that presence of N in the structure of CC had a negligible effect on the otherwise relatively high conductivity of CC. © 2019 Elsevier B.V.
T2  - Materials Chemistry and Physics
T1  - Composition, structure and potential energy application of nitrogen doped carbon cryogels
VL  - 239
SP  - 122120
DO  - 10.1016/j.matchemphys.2019.122120
ER  - 
@article{
author = "Kalijadis, Ana and Gavrilov, Nemanja M. and Jokić, Bojan M. and Gilić, Martina and Krstić, Aleksandar D. and Pašti, Igor A. and Babić, Biljana M.",
year = "2020",
abstract = "Resorcinol–formaldehyde (RF) cryogels were synthesized by sol–gel polycondensation of resorcinol with formaldehyde and freeze-drying was carried out with t-butanol. Carbon cryogel (CC) was obtained by pyrolyzing RF cryogels in an inert atmosphere to 950 °C. Nitrogen doped CCs (CCN) were synthesized by introducing melamine into RF precursor mixture solution to obtain nitrogen concentration 2, 6 and 10 wt.%. Material was characterized by elemental analysis, nitrogen adsorption– desorption measurements, scanning electron microscopy (SEM), Raman spectroscopy, FT-IR Spectroscopy. Cyclic voltammetry (CV) was used to investigate capacitive and electrocatalytic properties. Conductivity measurement was also performed. Elemental analysis results confirmed presence of nitrogen in CCN samples in the range from 0.45 to 1.15 wt.%. Raman spectroscopy of the samples showed increase of D and G peak integrated intensity ratio (ID/IG) with nitrogen doping suggesting that the structural disorder as well as edge plane density increase, but according to similar ID/IG values for CCN samples, their share is not directly related to the amount of incorporated N. Characterization by nitrogen adsorption showed that overall specific surface and maximum mesopores are achieved in CCN sample with medium nitrogen concentration. Results of cyclic voltammetry experiments demonstrated maximum capacitance for CCN sample with smallest N wt.% indicating that narrow pore size distribution and high specific surface area are dominant factors to achieve good capacitive behavior. The relatively low doping level of nitrogen reached in CCN samples may be the reason for the incomplete reduction of oxygen to hydroxide and furthermore it turned out that presence of N in the structure of CC had a negligible effect on the otherwise relatively high conductivity of CC. © 2019 Elsevier B.V.",
journal = "Materials Chemistry and Physics",
title = "Composition, structure and potential energy application of nitrogen doped carbon cryogels",
volume = "239",
pages = "122120",
doi = "10.1016/j.matchemphys.2019.122120"
}
Kalijadis, A., Gavrilov, N. M., Jokić, B. M., Gilić, M., Krstić, A. D., Pašti, I. A.,& Babić, B. M.. (2020). Composition, structure and potential energy application of nitrogen doped carbon cryogels. in Materials Chemistry and Physics, 239, 122120.
https://doi.org/10.1016/j.matchemphys.2019.122120
Kalijadis A, Gavrilov NM, Jokić BM, Gilić M, Krstić AD, Pašti IA, Babić BM. Composition, structure and potential energy application of nitrogen doped carbon cryogels. in Materials Chemistry and Physics. 2020;239:122120.
doi:10.1016/j.matchemphys.2019.122120 .
Kalijadis, Ana, Gavrilov, Nemanja M., Jokić, Bojan M., Gilić, Martina, Krstić, Aleksandar D., Pašti, Igor A., Babić, Biljana M., "Composition, structure and potential energy application of nitrogen doped carbon cryogels" in Materials Chemistry and Physics, 239 (2020):122120,
https://doi.org/10.1016/j.matchemphys.2019.122120 . .
1
1
1

Further insight into the influence of functionalization and positional isomerism of pyridinium ionic liquids on the aqueous two-phase system equilibria

Dimitrijević, Aleksandra; Мilićević, Jelena; Jocić, Ana; Marić, Slađana; Trtić-Petrović, Tatjana M.; Papović, Snežana; Tot, Aleksandar; Gadžurić, Slobodan; Vraneš, Milan

(2020)

TY  - JOUR
AU  - Dimitrijević, Aleksandra
AU  - Мilićević, Jelena
AU  - Jocić, Ana
AU  - Marić, Slađana
AU  - Trtić-Petrović, Tatjana M.
AU  - Papović, Snežana
AU  - Tot, Aleksandar
AU  - Gadžurić, Slobodan
AU  - Vraneš, Milan
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8833
AB  - Despite a large collection of publications dealing with the characterization of ionic liquid-based aqueous biphasic systems (IL-ABS), a gap still exists regarding the impact of functionalized alkyl side branches and IL positional isomers on phase equilibria. Therefore, this work addresses the investigation of the ability of different methyl substituted pyridinium based ILs on the formation of ABSs with K3PO4. We evaluated the impact of (i) functional groups (hydroxyl or ether) embed in side alkyl chains of pyridinium cations, (ii) positional isomerism of methyl group (ortho, meta and para) and (iii) the IL cation core. Ternary phase diagrams of the ABSs formed by these ILs and K3PO4 and the appropriate tie lines were determined and presented. It is shown that the presence of functionalized alkyl chain largely affects the salting-in behavior of ILs (ILs with the oxygen groups are more difficult to form ABS) while more subtle differences were observed among positional isomers. Based on the obtained results it is concluded that change of biphasic area of ABS is the manifestation of the altered affinity of ILs for water as a consequence of cation structure. Moreover, aiming at gathering a broader picture of the relationship between ILs structure and ABS properties, molecular simulations were performed, and it was showed that the obtained results are consistent with the experimental results. © 2020 Elsevier B.V.
T2  - Fluid Phase Equilibria
T1  - Further insight into the influence of functionalization and positional isomerism of pyridinium ionic liquids on the aqueous two-phase system equilibria
VL  - 512
SP  - 112520
DO  - 10.1016/j.fluid.2020.112520
ER  - 
@article{
author = "Dimitrijević, Aleksandra and Мilićević, Jelena and Jocić, Ana and Marić, Slađana and Trtić-Petrović, Tatjana M. and Papović, Snežana and Tot, Aleksandar and Gadžurić, Slobodan and Vraneš, Milan",
year = "2020",
abstract = "Despite a large collection of publications dealing with the characterization of ionic liquid-based aqueous biphasic systems (IL-ABS), a gap still exists regarding the impact of functionalized alkyl side branches and IL positional isomers on phase equilibria. Therefore, this work addresses the investigation of the ability of different methyl substituted pyridinium based ILs on the formation of ABSs with K3PO4. We evaluated the impact of (i) functional groups (hydroxyl or ether) embed in side alkyl chains of pyridinium cations, (ii) positional isomerism of methyl group (ortho, meta and para) and (iii) the IL cation core. Ternary phase diagrams of the ABSs formed by these ILs and K3PO4 and the appropriate tie lines were determined and presented. It is shown that the presence of functionalized alkyl chain largely affects the salting-in behavior of ILs (ILs with the oxygen groups are more difficult to form ABS) while more subtle differences were observed among positional isomers. Based on the obtained results it is concluded that change of biphasic area of ABS is the manifestation of the altered affinity of ILs for water as a consequence of cation structure. Moreover, aiming at gathering a broader picture of the relationship between ILs structure and ABS properties, molecular simulations were performed, and it was showed that the obtained results are consistent with the experimental results. © 2020 Elsevier B.V.",
journal = "Fluid Phase Equilibria",
title = "Further insight into the influence of functionalization and positional isomerism of pyridinium ionic liquids on the aqueous two-phase system equilibria",
volume = "512",
pages = "112520",
doi = "10.1016/j.fluid.2020.112520"
}
Dimitrijević, A., Мilićević, J., Jocić, A., Marić, S., Trtić-Petrović, T. M., Papović, S., Tot, A., Gadžurić, S.,& Vraneš, M.. (2020). Further insight into the influence of functionalization and positional isomerism of pyridinium ionic liquids on the aqueous two-phase system equilibria. in Fluid Phase Equilibria, 512, 112520.
https://doi.org/10.1016/j.fluid.2020.112520
Dimitrijević A, Мilićević J, Jocić A, Marić S, Trtić-Petrović TM, Papović S, Tot A, Gadžurić S, Vraneš M. Further insight into the influence of functionalization and positional isomerism of pyridinium ionic liquids on the aqueous two-phase system equilibria. in Fluid Phase Equilibria. 2020;512:112520.
doi:10.1016/j.fluid.2020.112520 .
Dimitrijević, Aleksandra, Мilićević, Jelena, Jocić, Ana, Marić, Slađana, Trtić-Petrović, Tatjana M., Papović, Snežana, Tot, Aleksandar, Gadžurić, Slobodan, Vraneš, Milan, "Further insight into the influence of functionalization and positional isomerism of pyridinium ionic liquids on the aqueous two-phase system equilibria" in Fluid Phase Equilibria, 512 (2020):112520,
https://doi.org/10.1016/j.fluid.2020.112520 . .
3
3
4

Protic ionic liquids as adjuvants to enhance extraction and separation performance of diverse polarity compounds in PEG-salt based aqueous biphasic system

Jocić, Ana; Marić, Slađana; Dimitrijević, Aleksandra; Tot, Aleksandar; Gadžurić, Slobodan; Vraneš, Milan; Trtić-Petrović, Tatjana M.

(2020)

TY  - JOUR
AU  - Jocić, Ana
AU  - Marić, Slađana
AU  - Dimitrijević, Aleksandra
AU  - Tot, Aleksandar
AU  - Gadžurić, Slobodan
AU  - Vraneš, Milan
AU  - Trtić-Petrović, Tatjana M.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8835
AB  - This work addresses use of a set of 2-hydroxypropylammonium based protic ionic liquids (PILs) as adjuvants in the aqueous biphasic system (ABS) composed of polyethylene glycol, with molecular weight 2000 g/mol (PEG 2000) and potassium carbonate. The phase diagrams were determined at 25 °C for ABS without and with the addition of 5 wt% of PIL. Comparative analysis of solubility curves indicates that PILs influence liquid-liquid equilibria of PEG 2000-K2CO3 ABS by heightening the hydrophilicity of a PEG-rich phase in various degrees. The compositions of the phases (tie lines) were determined for the selected ABS mixture composition, 26 wt% of PEG 2000 + 10 wt% of K2CO3, without and with 5 wt% of PILs, that is further used for the separation studies. The distribution of PILs between two phases is mainly dependent on specific PEG-PIL interactions and on the PIL content in ABS mixture. The experimental results are supported by molecular simulations that contributed to a broader picture of underlying effects of PILs as adjuvants on ABS formation. The partition of four dye compounds, Remazol Brilliant Blue R (RBBR), Orange II (OII), Rhodamine B (RB) and Congo Red (CR), as probe molecules with different intrinsic properties, was investigated. Obtained results show that the addition of PILs can improve the extraction of hydrophilic and charged compounds as OII, RBBR and CR in PEG-rich phase. On the other hand, it promotes the extraction of hydrophobic and neutral solutes as RB in salt-rich phase. By the addition of the most hydrophilic 3-chloropropanoate based PIL in the PEG 2000-K2CO3 ABS 12 times higher separation factor for OII and RB was achieved. © 2020 Elsevier B.V.
T2  - Journal of Molecular Liquids
T1  - Protic ionic liquids as adjuvants to enhance extraction and separation performance of diverse polarity compounds in PEG-salt based aqueous biphasic system
VL  - 303
SP  - 112484
DO  - 10.1016/j.molliq.2020.112484
ER  - 
@article{
author = "Jocić, Ana and Marić, Slađana and Dimitrijević, Aleksandra and Tot, Aleksandar and Gadžurić, Slobodan and Vraneš, Milan and Trtić-Petrović, Tatjana M.",
year = "2020",
abstract = "This work addresses use of a set of 2-hydroxypropylammonium based protic ionic liquids (PILs) as adjuvants in the aqueous biphasic system (ABS) composed of polyethylene glycol, with molecular weight 2000 g/mol (PEG 2000) and potassium carbonate. The phase diagrams were determined at 25 °C for ABS without and with the addition of 5 wt% of PIL. Comparative analysis of solubility curves indicates that PILs influence liquid-liquid equilibria of PEG 2000-K2CO3 ABS by heightening the hydrophilicity of a PEG-rich phase in various degrees. The compositions of the phases (tie lines) were determined for the selected ABS mixture composition, 26 wt% of PEG 2000 + 10 wt% of K2CO3, without and with 5 wt% of PILs, that is further used for the separation studies. The distribution of PILs between two phases is mainly dependent on specific PEG-PIL interactions and on the PIL content in ABS mixture. The experimental results are supported by molecular simulations that contributed to a broader picture of underlying effects of PILs as adjuvants on ABS formation. The partition of four dye compounds, Remazol Brilliant Blue R (RBBR), Orange II (OII), Rhodamine B (RB) and Congo Red (CR), as probe molecules with different intrinsic properties, was investigated. Obtained results show that the addition of PILs can improve the extraction of hydrophilic and charged compounds as OII, RBBR and CR in PEG-rich phase. On the other hand, it promotes the extraction of hydrophobic and neutral solutes as RB in salt-rich phase. By the addition of the most hydrophilic 3-chloropropanoate based PIL in the PEG 2000-K2CO3 ABS 12 times higher separation factor for OII and RB was achieved. © 2020 Elsevier B.V.",
journal = "Journal of Molecular Liquids",
title = "Protic ionic liquids as adjuvants to enhance extraction and separation performance of diverse polarity compounds in PEG-salt based aqueous biphasic system",
volume = "303",
pages = "112484",
doi = "10.1016/j.molliq.2020.112484"
}
Jocić, A., Marić, S., Dimitrijević, A., Tot, A., Gadžurić, S., Vraneš, M.,& Trtić-Petrović, T. M.. (2020). Protic ionic liquids as adjuvants to enhance extraction and separation performance of diverse polarity compounds in PEG-salt based aqueous biphasic system. in Journal of Molecular Liquids, 303, 112484.
https://doi.org/10.1016/j.molliq.2020.112484
Jocić A, Marić S, Dimitrijević A, Tot A, Gadžurić S, Vraneš M, Trtić-Petrović TM. Protic ionic liquids as adjuvants to enhance extraction and separation performance of diverse polarity compounds in PEG-salt based aqueous biphasic system. in Journal of Molecular Liquids. 2020;303:112484.
doi:10.1016/j.molliq.2020.112484 .
Jocić, Ana, Marić, Slađana, Dimitrijević, Aleksandra, Tot, Aleksandar, Gadžurić, Slobodan, Vraneš, Milan, Trtić-Petrović, Tatjana M., "Protic ionic liquids as adjuvants to enhance extraction and separation performance of diverse polarity compounds in PEG-salt based aqueous biphasic system" in Journal of Molecular Liquids, 303 (2020):112484,
https://doi.org/10.1016/j.molliq.2020.112484 . .
7
6
7

Valorization of Expired Energy Drinks by Designed and Integrated Ionic Liquid-Based Aqueous Biphasic Systems

Dimitrijević, Aleksandra; Tavares, Ana Paula M.; Almeida, Mafalda R.; Vraneš, Milan; Sousa, Ana C. A.; Cristovão, Ana Clara; Trtić-Petrović, Tatjana M.; Gadžurić, Slobodan; Freire, Mara G.

(2020)

TY  - JOUR
AU  - Dimitrijević, Aleksandra
AU  - Tavares, Ana Paula M.
AU  - Almeida, Mafalda R.
AU  - Vraneš, Milan
AU  - Sousa, Ana C. A.
AU  - Cristovão, Ana Clara
AU  - Trtić-Petrović, Tatjana M.
AU  - Gadžurić, Slobodan
AU  - Freire, Mara G.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8974
AB  - Expired energy drinks are rich in bioactive value-added compounds that can be recovered and reused in order to valorize food waste within a circular economy perspective. However, to accomplish such requirements, it is necessary to develop sustainable extraction and recovery processes, which must consist of decreasing the number of steps required or developing integrated strategies. In this work, novel aqueous biphasic systems (ABS) composed of ionic liquids (ILs) and a biocompatible polymer polypropylene glycol (400 g.mol(-1), PPG 400) were studied for the simultaneous extraction and recovery of three value-added compounds, namely, caffeine, taurine, and niacin, from expired energy drinks. ILs were designed and synthesized in order to have similar anions to the target compounds, thus allowing enhanced selectivity and biological activity, while avoiding an extra step of separation of these high-value compounds from the IL-rich phase. To this end, cholinium-based ILs comprising the anions lactate, pyruvate, taurate, and nicotinate were synthesized, and their cytotoxicity and ecotoxicity credentials were evaluated. Overall, taurine and niacin are majorly enriched in the IL-rich phase, while caffeine preferentially migrates in the majority of the cases toward the PPG-rich phase. However, caffeine also partitions to the IL-rich phase in the ABS formed by cholinium pyruvate or cholinium nicotinate. The ABS formed by cholinium nicotinate and PPG 400 is the best system identified, allowing the almost complete recovery (recovery efficiencies > 82%) of all target compounds into the IL-rich phase in one step. Furthermore, cholinium nicotinate exhibits marginal cytotoxic potential and is harmless from an ecotoxicological point of view. This system is thus a promising platform to simultaneously extract, recover, and reuse value-added compounds from expired energy drinks without the need of removing the IL or recovering the target compounds from the IL-rich phase, thus contributing to a sustainable and circular food economy.
T2  - ACS Sustainable Chemistry & Engineering
T1  - Valorization of Expired Energy Drinks by Designed and Integrated Ionic Liquid-Based Aqueous Biphasic Systems
VL  - 8
IS  - 14
SP  - 5683
EP  - 5692
DO  - 10.1021/acssuschemeng.0c00429
ER  - 
@article{
author = "Dimitrijević, Aleksandra and Tavares, Ana Paula M. and Almeida, Mafalda R. and Vraneš, Milan and Sousa, Ana C. A. and Cristovão, Ana Clara and Trtić-Petrović, Tatjana M. and Gadžurić, Slobodan and Freire, Mara G.",
year = "2020",
abstract = "Expired energy drinks are rich in bioactive value-added compounds that can be recovered and reused in order to valorize food waste within a circular economy perspective. However, to accomplish such requirements, it is necessary to develop sustainable extraction and recovery processes, which must consist of decreasing the number of steps required or developing integrated strategies. In this work, novel aqueous biphasic systems (ABS) composed of ionic liquids (ILs) and a biocompatible polymer polypropylene glycol (400 g.mol(-1), PPG 400) were studied for the simultaneous extraction and recovery of three value-added compounds, namely, caffeine, taurine, and niacin, from expired energy drinks. ILs were designed and synthesized in order to have similar anions to the target compounds, thus allowing enhanced selectivity and biological activity, while avoiding an extra step of separation of these high-value compounds from the IL-rich phase. To this end, cholinium-based ILs comprising the anions lactate, pyruvate, taurate, and nicotinate were synthesized, and their cytotoxicity and ecotoxicity credentials were evaluated. Overall, taurine and niacin are majorly enriched in the IL-rich phase, while caffeine preferentially migrates in the majority of the cases toward the PPG-rich phase. However, caffeine also partitions to the IL-rich phase in the ABS formed by cholinium pyruvate or cholinium nicotinate. The ABS formed by cholinium nicotinate and PPG 400 is the best system identified, allowing the almost complete recovery (recovery efficiencies > 82%) of all target compounds into the IL-rich phase in one step. Furthermore, cholinium nicotinate exhibits marginal cytotoxic potential and is harmless from an ecotoxicological point of view. This system is thus a promising platform to simultaneously extract, recover, and reuse value-added compounds from expired energy drinks without the need of removing the IL or recovering the target compounds from the IL-rich phase, thus contributing to a sustainable and circular food economy.",
journal = "ACS Sustainable Chemistry & Engineering",
title = "Valorization of Expired Energy Drinks by Designed and Integrated Ionic Liquid-Based Aqueous Biphasic Systems",
volume = "8",
number = "14",
pages = "5683-5692",
doi = "10.1021/acssuschemeng.0c00429"
}
Dimitrijević, A., Tavares, A. P. M., Almeida, M. R., Vraneš, M., Sousa, A. C. A., Cristovão, A. C., Trtić-Petrović, T. M., Gadžurić, S.,& Freire, M. G.. (2020). Valorization of Expired Energy Drinks by Designed and Integrated Ionic Liquid-Based Aqueous Biphasic Systems. in ACS Sustainable Chemistry & Engineering, 8(14), 5683-5692.
https://doi.org/10.1021/acssuschemeng.0c00429
Dimitrijević A, Tavares APM, Almeida MR, Vraneš M, Sousa ACA, Cristovão AC, Trtić-Petrović TM, Gadžurić S, Freire MG. Valorization of Expired Energy Drinks by Designed and Integrated Ionic Liquid-Based Aqueous Biphasic Systems. in ACS Sustainable Chemistry & Engineering. 2020;8(14):5683-5692.
doi:10.1021/acssuschemeng.0c00429 .
Dimitrijević, Aleksandra, Tavares, Ana Paula M., Almeida, Mafalda R., Vraneš, Milan, Sousa, Ana C. A., Cristovão, Ana Clara, Trtić-Petrović, Tatjana M., Gadžurić, Slobodan, Freire, Mara G., "Valorization of Expired Energy Drinks by Designed and Integrated Ionic Liquid-Based Aqueous Biphasic Systems" in ACS Sustainable Chemistry & Engineering, 8, no. 14 (2020):5683-5692,
https://doi.org/10.1021/acssuschemeng.0c00429 . .
5
3
2
3

Investigation of the graphene thermal motion by rainbow scattering

Ćosić, Marko; Hadžijojić, Milivoje; Rymzhanov, Ruslan; Petrović, Srđan M.; Bellucci, Stefano

(2019)

TY  - JOUR
AU  - Ćosić, Marko
AU  - Hadžijojić, Milivoje
AU  - Rymzhanov, Ruslan
AU  - Petrović, Srđan M.
AU  - Bellucci, Stefano
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8022
AB  - The thermal motion of graphene atoms was investigated using angular distributions of transmitted protons. The static proton-graphene interaction potential was constructed applying the Doyle-Turner's expression for the proton-carbon interaction potential. The effects of atom thermal motion were incorporated by averaging the static proton-graphene interaction potential over the distribution of atom displacements. The covariance matrix of graphene displacements was modeled according to the Debye theory, and calculated using Molecular Dynamics approach. Proton trajectories were used for construction of angular yields. We have found that there are lines, called rainbows, along which the angular yield is very large. Their evolution in respect to different sample orientation was examined in detail. Further we found that atom thermal motion has negligible influence on rainbows generated by protons experiencing distant collisions with the carbon atoms forming the graphene hexagon. On the other hand, rainbows generated by protons experiencing close collisions with the carbon atoms can be modeled by ellipses whose parameters are very sensitive to the structure of the covariance matrix. Numerical procedure was developed for extraction of the covariance matrix from the corresponding rainbow patterns in the general case, when atoms perform fully anisotropic and correlated motion. © 2019 Elsevier Ltd
T2  - Carbon
T1  - Investigation of the graphene thermal motion by rainbow scattering
VL  - 145
SP  - 161
EP  - 174
DO  - 10.1016/j.carbon.2019.01.020
ER  - 
@article{
author = "Ćosić, Marko and Hadžijojić, Milivoje and Rymzhanov, Ruslan and Petrović, Srđan M. and Bellucci, Stefano",
year = "2019",
abstract = "The thermal motion of graphene atoms was investigated using angular distributions of transmitted protons. The static proton-graphene interaction potential was constructed applying the Doyle-Turner's expression for the proton-carbon interaction potential. The effects of atom thermal motion were incorporated by averaging the static proton-graphene interaction potential over the distribution of atom displacements. The covariance matrix of graphene displacements was modeled according to the Debye theory, and calculated using Molecular Dynamics approach. Proton trajectories were used for construction of angular yields. We have found that there are lines, called rainbows, along which the angular yield is very large. Their evolution in respect to different sample orientation was examined in detail. Further we found that atom thermal motion has negligible influence on rainbows generated by protons experiencing distant collisions with the carbon atoms forming the graphene hexagon. On the other hand, rainbows generated by protons experiencing close collisions with the carbon atoms can be modeled by ellipses whose parameters are very sensitive to the structure of the covariance matrix. Numerical procedure was developed for extraction of the covariance matrix from the corresponding rainbow patterns in the general case, when atoms perform fully anisotropic and correlated motion. © 2019 Elsevier Ltd",
journal = "Carbon",
title = "Investigation of the graphene thermal motion by rainbow scattering",
volume = "145",
pages = "161-174",
doi = "10.1016/j.carbon.2019.01.020"
}
Ćosić, M., Hadžijojić, M., Rymzhanov, R., Petrović, S. M.,& Bellucci, S.. (2019). Investigation of the graphene thermal motion by rainbow scattering. in Carbon, 145, 161-174.
https://doi.org/10.1016/j.carbon.2019.01.020
Ćosić M, Hadžijojić M, Rymzhanov R, Petrović SM, Bellucci S. Investigation of the graphene thermal motion by rainbow scattering. in Carbon. 2019;145:161-174.
doi:10.1016/j.carbon.2019.01.020 .
Ćosić, Marko, Hadžijojić, Milivoje, Rymzhanov, Ruslan, Petrović, Srđan M., Bellucci, Stefano, "Investigation of the graphene thermal motion by rainbow scattering" in Carbon, 145 (2019):161-174,
https://doi.org/10.1016/j.carbon.2019.01.020 . .
2

Investigation of the graphene thermal motion by rainbow scattering

Ćosić, Marko; Hadžijojić, Milivoje; Rymzhanov, Ruslan; Petrović, Srđan M.; Bellucci, Stefano

(2019)

TY  - JOUR
AU  - Ćosić, Marko
AU  - Hadžijojić, Milivoje
AU  - Rymzhanov, Ruslan
AU  - Petrović, Srđan M.
AU  - Bellucci, Stefano
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8031
AB  - The thermal motion of graphene atoms was investigated using angular distributions of transmitted protons. The static proton-graphene interaction potential was constructed applying the Doyle-Turner's expression for the proton-carbon interaction potential. The effects of atom thermal motion were incorporated by averaging the static proton-graphene interaction potential over the distribution of atom displacements. The covariance matrix of graphene displacements was modeled according to the Debye theory, and calculated using Molecular Dynamics approach. Proton trajectories were used for construction of angular yields. We have found that there are lines, called rainbows, along which the angular yield is very large. Their evolution in respect to different sample orientation was examined in detail. Further we found that atom thermal motion has negligible influence on rainbows generated by protons experiencing distant collisions with the carbon atoms forming the graphene hexagon. On the other hand, rainbows generated by protons experiencing close collisions with the carbon atoms can be modeled by ellipses whose parameters are very sensitive to the structure of the covariance matrix. Numerical procedure was developed for extraction of the covariance matrix from the corresponding rainbow patterns in the general case, when atoms perform fully anisotropic and correlated motion.
T2  - Carbon
T1  - Investigation of the graphene thermal motion by rainbow scattering
VL  - 145
SP  - 161
EP  - 174
DO  - 10.1016/j.carbon.2019.01.020
ER  - 
@article{
author = "Ćosić, Marko and Hadžijojić, Milivoje and Rymzhanov, Ruslan and Petrović, Srđan M. and Bellucci, Stefano",
year = "2019",
abstract = "The thermal motion of graphene atoms was investigated using angular distributions of transmitted protons. The static proton-graphene interaction potential was constructed applying the Doyle-Turner's expression for the proton-carbon interaction potential. The effects of atom thermal motion were incorporated by averaging the static proton-graphene interaction potential over the distribution of atom displacements. The covariance matrix of graphene displacements was modeled according to the Debye theory, and calculated using Molecular Dynamics approach. Proton trajectories were used for construction of angular yields. We have found that there are lines, called rainbows, along which the angular yield is very large. Their evolution in respect to different sample orientation was examined in detail. Further we found that atom thermal motion has negligible influence on rainbows generated by protons experiencing distant collisions with the carbon atoms forming the graphene hexagon. On the other hand, rainbows generated by protons experiencing close collisions with the carbon atoms can be modeled by ellipses whose parameters are very sensitive to the structure of the covariance matrix. Numerical procedure was developed for extraction of the covariance matrix from the corresponding rainbow patterns in the general case, when atoms perform fully anisotropic and correlated motion.",
journal = "Carbon",
title = "Investigation of the graphene thermal motion by rainbow scattering",
volume = "145",
pages = "161-174",
doi = "10.1016/j.carbon.2019.01.020"
}
Ćosić, M., Hadžijojić, M., Rymzhanov, R., Petrović, S. M.,& Bellucci, S.. (2019). Investigation of the graphene thermal motion by rainbow scattering. in Carbon, 145, 161-174.
https://doi.org/10.1016/j.carbon.2019.01.020
Ćosić M, Hadžijojić M, Rymzhanov R, Petrović SM, Bellucci S. Investigation of the graphene thermal motion by rainbow scattering. in Carbon. 2019;145:161-174.
doi:10.1016/j.carbon.2019.01.020 .
Ćosić, Marko, Hadžijojić, Milivoje, Rymzhanov, Ruslan, Petrović, Srđan M., Bellucci, Stefano, "Investigation of the graphene thermal motion by rainbow scattering" in Carbon, 145 (2019):161-174,
https://doi.org/10.1016/j.carbon.2019.01.020 . .
2

Superfocusing and zero-degree focusing in planar channeling of protons in a thin silicon crystal

Ćosić, Marko; Nešković, Nebojša B.; Petrović, Srđan M.

(2019)

TY  - JOUR
AU  - Ćosić, Marko
AU  - Nešković, Nebojša B.
AU  - Petrović, Srđan M.
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0168583X19300758
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8049
AB  - This is a theoretical study of the superfocusing and zero-degree focusing effects appearing in channeling of protons of energy of 2 MeV in the {1 1 0} channel of a thin silicon crystal. We prove that the ultimate origin of these effects is the crystal rainbow effect, which has been discovered and explored in ion transmission through axial crystal channels, nanotubes and graphene. Moreover, the effect is the origin of the shapes of the whole spatial and angular distributions of channeled protons. The incident proton velocity vector is taken to be parallel to the channel midplane. We use the Molière's approximation of the Thomas-Fermi proton-atom interaction potential and the continuum approximation. The effect of thermal vibrations of the crystal's atoms is included. We solve numerically the proton equation of motion and analyze the spatial and angular proton transmission functions. The extrema of these functions are the spatial and angular rainbow points, respectively. When the whole proton beam is taken into account, a spatial rainbow pattern, composed of the lines emerging from the superfocusing points, and an angular rainbow pattern, consisting of the lines emerging from the origin and the zero-degree focusing points, appear along the channel. We consider the region of crystal thickness comprising the first, second and third superfocusing and zero-degree focusing points. When the effect of thermal vibrations is neglected, each of these rainbow lines look like the bifurcation set of the cusp catastrophe, and when the effect is included, the line resembles the bifurcation set of the butterfly catastrophe. We demonstrate that the spatial and angular distributions of transmitted protons are fully determined by the spatial and angular rainbow lines, respectively. The superfocusing and zero-degree focusing effects weaken with the increase of the crystal thickness. This is a consequence of the anharmonicity of the continuum proton-crystal interaction potential, which makes the proton beam propagation through the channel incoherent. We also explore the influence of the effect of proton collisions with the crystal's electrons on the beam dynamics in the channel. This effect additionally contributes to the incoherence of the beam motion along the channel. Our opinion is that the peaks of the spatial and angular distributions of ions transmitted through the planar channels lying off the origin registered before were in fact the rainbow peaks. © 2019 Elsevier B.V.
T2  - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
T1  - Superfocusing and zero-degree focusing in planar channeling of protons in a thin silicon crystal
VL  - 444
SP  - 10
EP  - 22
DO  - 10.1016/j.nimb.2019.02.004
ER  - 
@article{
author = "Ćosić, Marko and Nešković, Nebojša B. and Petrović, Srđan M.",
year = "2019",
abstract = "This is a theoretical study of the superfocusing and zero-degree focusing effects appearing in channeling of protons of energy of 2 MeV in the {1 1 0} channel of a thin silicon crystal. We prove that the ultimate origin of these effects is the crystal rainbow effect, which has been discovered and explored in ion transmission through axial crystal channels, nanotubes and graphene. Moreover, the effect is the origin of the shapes of the whole spatial and angular distributions of channeled protons. The incident proton velocity vector is taken to be parallel to the channel midplane. We use the Molière's approximation of the Thomas-Fermi proton-atom interaction potential and the continuum approximation. The effect of thermal vibrations of the crystal's atoms is included. We solve numerically the proton equation of motion and analyze the spatial and angular proton transmission functions. The extrema of these functions are the spatial and angular rainbow points, respectively. When the whole proton beam is taken into account, a spatial rainbow pattern, composed of the lines emerging from the superfocusing points, and an angular rainbow pattern, consisting of the lines emerging from the origin and the zero-degree focusing points, appear along the channel. We consider the region of crystal thickness comprising the first, second and third superfocusing and zero-degree focusing points. When the effect of thermal vibrations is neglected, each of these rainbow lines look like the bifurcation set of the cusp catastrophe, and when the effect is included, the line resembles the bifurcation set of the butterfly catastrophe. We demonstrate that the spatial and angular distributions of transmitted protons are fully determined by the spatial and angular rainbow lines, respectively. The superfocusing and zero-degree focusing effects weaken with the increase of the crystal thickness. This is a consequence of the anharmonicity of the continuum proton-crystal interaction potential, which makes the proton beam propagation through the channel incoherent. We also explore the influence of the effect of proton collisions with the crystal's electrons on the beam dynamics in the channel. This effect additionally contributes to the incoherence of the beam motion along the channel. Our opinion is that the peaks of the spatial and angular distributions of ions transmitted through the planar channels lying off the origin registered before were in fact the rainbow peaks. © 2019 Elsevier B.V.",
journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",
title = "Superfocusing and zero-degree focusing in planar channeling of protons in a thin silicon crystal",
volume = "444",
pages = "10-22",
doi = "10.1016/j.nimb.2019.02.004"
}
Ćosić, M., Nešković, N. B.,& Petrović, S. M.. (2019). Superfocusing and zero-degree focusing in planar channeling of protons in a thin silicon crystal. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 444, 10-22.
https://doi.org/10.1016/j.nimb.2019.02.004
Ćosić M, Nešković NB, Petrović SM. Superfocusing and zero-degree focusing in planar channeling of protons in a thin silicon crystal. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. 2019;444:10-22.
doi:10.1016/j.nimb.2019.02.004 .
Ćosić, Marko, Nešković, Nebojša B., Petrović, Srđan M., "Superfocusing and zero-degree focusing in planar channeling of protons in a thin silicon crystal" in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 444 (2019):10-22,
https://doi.org/10.1016/j.nimb.2019.02.004 . .
4
5
4

Universal axial (0 0 1) rainbow channeling interaction potential

Petrović, Srđan M.; Starčević, Nikola; Ćosić, Marko

(2019)

TY  - JOUR
AU  - Petrović, Srđan M.
AU  - Starčević, Nikola
AU  - Ćosić, Marko
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0168583X19301740
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8112
AB  - This work is devoted to the construction of the universal axial (0 0 1) rainbow channeling proton-crystal interaction potential. It has been done by modifying the Moliere's interaction potential. We show that for very thin crystals with the cubic crystallographic structure, in the (0 0 1) orientation with respect to 2 MeV proton beams, it is possible to obtain a universal proton-crystal interaction potential from the morphological analysis of the rainbows in the proton transmission angular plane. © 2019
T2  - Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
T1  - Universal axial (0 0 1) rainbow channeling interaction potential
VL  - 447
SP  - 79
EP  - 83
DO  - 10.1016/j.nimb.2019.03.050
ER  - 
@article{
author = "Petrović, Srđan M. and Starčević, Nikola and Ćosić, Marko",
year = "2019",
abstract = "This work is devoted to the construction of the universal axial (0 0 1) rainbow channeling proton-crystal interaction potential. It has been done by modifying the Moliere's interaction potential. We show that for very thin crystals with the cubic crystallographic structure, in the (0 0 1) orientation with respect to 2 MeV proton beams, it is possible to obtain a universal proton-crystal interaction potential from the morphological analysis of the rainbows in the proton transmission angular plane. © 2019",
journal = "Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms",
title = "Universal axial (0 0 1) rainbow channeling interaction potential",
volume = "447",
pages = "79-83",
doi = "10.1016/j.nimb.2019.03.050"
}
Petrović, S. M., Starčević, N.,& Ćosić, M.. (2019). Universal axial (0 0 1) rainbow channeling interaction potential. in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 447, 79-83.
https://doi.org/10.1016/j.nimb.2019.03.050
Petrović SM, Starčević N, Ćosić M. Universal axial (0 0 1) rainbow channeling interaction potential. in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 2019;447:79-83.
doi:10.1016/j.nimb.2019.03.050 .
Petrović, Srđan M., Starčević, Nikola, Ćosić, Marko, "Universal axial (0 0 1) rainbow channeling interaction potential" in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 447 (2019):79-83,
https://doi.org/10.1016/j.nimb.2019.03.050 . .
1
1
1

Quantum Rainbows in Positron Transmission through Carbon Nanotubes

Ćosić, Marko; Petrović, Srđan M.; Nešković, Nebojša B.

(2019)

TY  - JOUR
AU  - Ćosić, Marko
AU  - Petrović, Srđan M.
AU  - Nešković, Nebojša B.
PY  - 2019
UR  - http://www.mdpi.com/2218-2004/7/1/16
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8226
AB  - Here we report the results of the theoretical investigation of the transmission of channeled positrons through various short chiral single walled carbon nanotubes (SWCNT). The main question answered by this study is “What are the manifestations of the rainbow effect in the channeling of quantum particles that happens during the channeling of classical particles?” To answer this question, the corresponding classical and quantum problems were solved in parallel, critically examined, and compared with each other. Positron energies were taken to be 1 MeV when the quantum approach was necessary. The continuum positron-nanotube potential was constructed from the thermally averaged Molière’s positron-carbon potential. In the classical approach, a positron beam is considered as an ensemble of noninteracting particles. In the quantum approach, it is considered as an ensemble of noninteracting wave packages. Distributions of transmitted positrons were constructed from the numerical solutions of Newton’s equation and the time-dependent Schrödinger equation. For the transmission of 1-MeV positrons through 200-nm long SWCNT (14; 4), in addition to the central maximum, the quantum angular distribution has a prominent peak pair (close to the classical rainbows) and two smaller peaks pairs. We have shown that even though the semiclassical approximation is not strictly applicable it is useful for explanation of the observed behavior. In vicinity of the most prominent peak, i.e., the primary rainbow peak, rays interfere constructively. On one of its sides, rays become complex, which explains the exponential decay of the probability density in that region. On the other side, the ray interference alternates between constructive and destructive, thus generating two observed supernumerary rainbow peaks. The developed model was then applied for the explanation of the angular distributions of 1-MeV positrons transmitting through 200 nm long (7, 3), (8, 5), (9, 7), (14, 4), (16, 5) and (17, 7) SWCNTs. It has been shown that this explains most but not all rainbow patterns. Therefore, a new method for the identification and classification of quantum rainbows was developed relying only on the morphological properties of the positron wave function amplitude and the phase function families. This led to a detailed explanation of the way the quantum rainbows are generated. All wave packets wrinkle due to their internal focusing in a mutually coordinated way and are concentrated near the position of the corresponding classical rainbow. This explanation is general and applicable to the investigations of quantum effects occurring in various other atomic collision processes.
T2  - Atoms
T1  - Quantum Rainbows in Positron Transmission through Carbon Nanotubes
VL  - 7
IS  - 1
SP  - 16
DO  - 10.3390/atoms7010016
ER  - 
@article{
author = "Ćosić, Marko and Petrović, Srđan M. and Nešković, Nebojša B.",
year = "2019",
abstract = "Here we report the results of the theoretical investigation of the transmission of channeled positrons through various short chiral single walled carbon nanotubes (SWCNT). The main question answered by this study is “What are the manifestations of the rainbow effect in the channeling of quantum particles that happens during the channeling of classical particles?” To answer this question, the corresponding classical and quantum problems were solved in parallel, critically examined, and compared with each other. Positron energies were taken to be 1 MeV when the quantum approach was necessary. The continuum positron-nanotube potential was constructed from the thermally averaged Molière’s positron-carbon potential. In the classical approach, a positron beam is considered as an ensemble of noninteracting particles. In the quantum approach, it is considered as an ensemble of noninteracting wave packages. Distributions of transmitted positrons were constructed from the numerical solutions of Newton’s equation and the time-dependent Schrödinger equation. For the transmission of 1-MeV positrons through 200-nm long SWCNT (14; 4), in addition to the central maximum, the quantum angular distribution has a prominent peak pair (close to the classical rainbows) and two smaller peaks pairs. We have shown that even though the semiclassical approximation is not strictly applicable it is useful for explanation of the observed behavior. In vicinity of the most prominent peak, i.e., the primary rainbow peak, rays interfere constructively. On one of its sides, rays become complex, which explains the exponential decay of the probability density in that region. On the other side, the ray interference alternates between constructive and destructive, thus generating two observed supernumerary rainbow peaks. The developed model was then applied for the explanation of the angular distributions of 1-MeV positrons transmitting through 200 nm long (7, 3), (8, 5), (9, 7), (14, 4), (16, 5) and (17, 7) SWCNTs. It has been shown that this explains most but not all rainbow patterns. Therefore, a new method for the identification and classification of quantum rainbows was developed relying only on the morphological properties of the positron wave function amplitude and the phase function families. This led to a detailed explanation of the way the quantum rainbows are generated. All wave packets wrinkle due to their internal focusing in a mutually coordinated way and are concentrated near the position of the corresponding classical rainbow. This explanation is general and applicable to the investigations of quantum effects occurring in various other atomic collision processes.",
journal = "Atoms",
title = "Quantum Rainbows in Positron Transmission through Carbon Nanotubes",
volume = "7",
number = "1",
pages = "16",
doi = "10.3390/atoms7010016"
}
Ćosić, M., Petrović, S. M.,& Nešković, N. B.. (2019). Quantum Rainbows in Positron Transmission through Carbon Nanotubes. in Atoms, 7(1), 16.
https://doi.org/10.3390/atoms7010016
Ćosić M, Petrović SM, Nešković NB. Quantum Rainbows in Positron Transmission through Carbon Nanotubes. in Atoms. 2019;7(1):16.
doi:10.3390/atoms7010016 .
Ćosić, Marko, Petrović, Srđan M., Nešković, Nebojša B., "Quantum Rainbows in Positron Transmission through Carbon Nanotubes" in Atoms, 7, no. 1 (2019):16,
https://doi.org/10.3390/atoms7010016 . .
1
2
1
2

Influence of the Charge State of Xenon Ions on the Depth Distribution Profile Upon Implantation into Silicon

Balakshin, Yu. V.; Kozhemiako, A. V.; Petrović, Srđan M.; Erich, Marko; Shemukhin, Andrey A.; Chernysh, Vladimir S.

(2019)

TY  - JOUR
AU  - Balakshin, Yu. V.
AU  - Kozhemiako, A. V.
AU  - Petrović, Srđan M.
AU  - Erich, Marko
AU  - Shemukhin, Andrey A.
AU  - Chernysh, Vladimir S.
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8436
AB  - Abstract: Experimental depth distributions of the concentration of implanted xenon ions depending on their charge state and irradiation energy are presented. Xenon ions in charge states q = 1–20 and energies in the range from 50 to 400 keV are incorporated into single-crystal silicon. Irradiation is performed in the direction not coinciding with the crystallographic axes of the crystal to avoid the channeling effect. The ion fluence varies in the range of 5 × (1014–1015) ion/cm2. The irradiation by singly charged ions and investigation of the samples by Rutherford backscattering spectroscopy is performed using an HVEE acceleration complex at Moscow State University. Multiply charged ions are implanted using a FAMA acceleration complex at the Vinća Institute of Nuclear Sciences. The depth distribution profiles of the incorporated ions are found using Rutherford backscattering spectroscopy. Experimental results are correlated with computer calculations. It is shown that the average projective path of multiply charged ions in most cases is shorter when compared with the average projected path of singly charged ions and the results of computer modeling. © 2019, Pleiades Publishing, Ltd.
T2  - Semiconductors
T1  - Influence of the Charge State of Xenon Ions on the Depth Distribution Profile Upon Implantation into Silicon
VL  - 53
IS  - 8
SP  - 1011
EP  - 1017
DO  - 10.1134/S1063782619080062
ER  - 
@article{
author = "Balakshin, Yu. V. and Kozhemiako, A. V. and Petrović, Srđan M. and Erich, Marko and Shemukhin, Andrey A. and Chernysh, Vladimir S.",
year = "2019",
abstract = "Abstract: Experimental depth distributions of the concentration of implanted xenon ions depending on their charge state and irradiation energy are presented. Xenon ions in charge states q = 1–20 and energies in the range from 50 to 400 keV are incorporated into single-crystal silicon. Irradiation is performed in the direction not coinciding with the crystallographic axes of the crystal to avoid the channeling effect. The ion fluence varies in the range of 5 × (1014–1015) ion/cm2. The irradiation by singly charged ions and investigation of the samples by Rutherford backscattering spectroscopy is performed using an HVEE acceleration complex at Moscow State University. Multiply charged ions are implanted using a FAMA acceleration complex at the Vinća Institute of Nuclear Sciences. The depth distribution profiles of the incorporated ions are found using Rutherford backscattering spectroscopy. Experimental results are correlated with computer calculations. It is shown that the average projective path of multiply charged ions in most cases is shorter when compared with the average projected path of singly charged ions and the results of computer modeling. © 2019, Pleiades Publishing, Ltd.",
journal = "Semiconductors",
title = "Influence of the Charge State of Xenon Ions on the Depth Distribution Profile Upon Implantation into Silicon",
volume = "53",
number = "8",
pages = "1011-1017",
doi = "10.1134/S1063782619080062"
}
Balakshin, Yu. V., Kozhemiako, A. V., Petrović, S. M., Erich, M., Shemukhin, A. A.,& Chernysh, V. S.. (2019). Influence of the Charge State of Xenon Ions on the Depth Distribution Profile Upon Implantation into Silicon. in Semiconductors, 53(8), 1011-1017.
https://doi.org/10.1134/S1063782619080062
Balakshin YV, Kozhemiako AV, Petrović SM, Erich M, Shemukhin AA, Chernysh VS. Influence of the Charge State of Xenon Ions on the Depth Distribution Profile Upon Implantation into Silicon. in Semiconductors. 2019;53(8):1011-1017.
doi:10.1134/S1063782619080062 .
Balakshin, Yu. V., Kozhemiako, A. V., Petrović, Srđan M., Erich, Marko, Shemukhin, Andrey A., Chernysh, Vladimir S., "Influence of the Charge State of Xenon Ions on the Depth Distribution Profile Upon Implantation into Silicon" in Semiconductors, 53, no. 8 (2019):1011-1017,
https://doi.org/10.1134/S1063782619080062 . .
2
3
3

Voltammetric sensor based on Pt nanoparticles suported MWCNT for determination of pesticide clomazone in water samples

Ranđelović, Marjan S.; Momčilović, Milan Z.; Milićević, Jelena S.; Đurović-Pejčev, Rada D.; Mofarah, Sajjad S.; Sorrel, Charles C.

(2019)

TY  - JOUR
AU  - Ranđelović, Marjan S.
AU  - Momčilović, Milan Z.
AU  - Milićević, Jelena S.
AU  - Đurović-Pejčev, Rada D.
AU  - Mofarah, Sajjad S.
AU  - Sorrel, Charles C.
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8619
AB  - Novel electrochemical sensor based on Pt supported multiwalled carbon nanotubes is used for determination of pesticide clomazone in aqueous media via differential pulse stripping voltammetry (DPSV). Since clomazone is stable and readily soluble in water, it is often found in water sources. Hence, its determination in the environment is of utmost importance. Herein, clomazone is determined in 0.1 M phosphate buffer solution at pH 7.0 in the concentration range of 0.61–20.56 ng cm−3, with LOQ = 0.61 and LOD = 0.38. These results are in the same range with HPLC/DAD, which is used as comparative method. It is shown that DPSV is a facile and efficient way for determination of clomazone in contrast to precise but field-impractical HPLC. Mechanistic approach in explaining electrode processes is correlated to structural aspects of the synthesized sensor. HRTEM data reveals a uniform distribution of Pt nanoparticles on the MWCNT support as a source of crucial, structural and electronic changes. Furthermore, characterisation of Raman results indicates the existence of structural defects, which is believed to be the leading reason for improvement in sensing response. © 2019 Taiwan Institute of Chemical Engineers
T2  - Journal of the Taiwan Institute of Chemical Engineers
T1  - Voltammetric sensor based on Pt nanoparticles suported MWCNT for determination of pesticide clomazone in water samples
VL  - 105
SP  - 115
EP  - 123
DO  - 10.1016/j.jtice.2019.10.013
ER  - 
@article{
author = "Ranđelović, Marjan S. and Momčilović, Milan Z. and Milićević, Jelena S. and Đurović-Pejčev, Rada D. and Mofarah, Sajjad S. and Sorrel, Charles C.",
year = "2019",
abstract = "Novel electrochemical sensor based on Pt supported multiwalled carbon nanotubes is used for determination of pesticide clomazone in aqueous media via differential pulse stripping voltammetry (DPSV). Since clomazone is stable and readily soluble in water, it is often found in water sources. Hence, its determination in the environment is of utmost importance. Herein, clomazone is determined in 0.1 M phosphate buffer solution at pH 7.0 in the concentration range of 0.61–20.56 ng cm−3, with LOQ = 0.61 and LOD = 0.38. These results are in the same range with HPLC/DAD, which is used as comparative method. It is shown that DPSV is a facile and efficient way for determination of clomazone in contrast to precise but field-impractical HPLC. Mechanistic approach in explaining electrode processes is correlated to structural aspects of the synthesized sensor. HRTEM data reveals a uniform distribution of Pt nanoparticles on the MWCNT support as a source of crucial, structural and electronic changes. Furthermore, characterisation of Raman results indicates the existence of structural defects, which is believed to be the leading reason for improvement in sensing response. © 2019 Taiwan Institute of Chemical Engineers",
journal = "Journal of the Taiwan Institute of Chemical Engineers",
title = "Voltammetric sensor based on Pt nanoparticles suported MWCNT for determination of pesticide clomazone in water samples",
volume = "105",
pages = "115-123",
doi = "10.1016/j.jtice.2019.10.013"
}
Ranđelović, M. S., Momčilović, M. Z., Milićević, J. S., Đurović-Pejčev, R. D., Mofarah, S. S.,& Sorrel, C. C.. (2019). Voltammetric sensor based on Pt nanoparticles suported MWCNT for determination of pesticide clomazone in water samples. in Journal of the Taiwan Institute of Chemical Engineers, 105, 115-123.
https://doi.org/10.1016/j.jtice.2019.10.013
Ranđelović MS, Momčilović MZ, Milićević JS, Đurović-Pejčev RD, Mofarah SS, Sorrel CC. Voltammetric sensor based on Pt nanoparticles suported MWCNT for determination of pesticide clomazone in water samples. in Journal of the Taiwan Institute of Chemical Engineers. 2019;105:115-123.
doi:10.1016/j.jtice.2019.10.013 .
Ranđelović, Marjan S., Momčilović, Milan Z., Milićević, Jelena S., Đurović-Pejčev, Rada D., Mofarah, Sajjad S., Sorrel, Charles C., "Voltammetric sensor based on Pt nanoparticles suported MWCNT for determination of pesticide clomazone in water samples" in Journal of the Taiwan Institute of Chemical Engineers, 105 (2019):115-123,
https://doi.org/10.1016/j.jtice.2019.10.013 . .
4
3
4

In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal

Vasiljević-Nedić, Bojana; Obradović, Milena; Bajuk-Bogdanović, Danica V.; Milojević-Rakić, Maja; Jovanović, Zoran M.; Gavrilov, Nemanja M.; Holclajtner-Antunović, Ivanka D.

(2019)

TY  - JOUR
AU  - Vasiljević-Nedić, Bojana
AU  - Obradović, Milena
AU  - Bajuk-Bogdanović, Danica V.
AU  - Milojević-Rakić, Maja
AU  - Jovanović, Zoran M.
AU  - Gavrilov, Nemanja M.
AU  - Holclajtner-Antunović, Ivanka D.
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S1001074218314682
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8217
AB  - Potassium tungstophosphate is supported on BEA zeolite by in situ synthesis for glyphosate removal. Spectroscopic measurements identified hydrogen bonding as a primal interaction of potassium salt and BEA zeolite. Composites are evaluated for glyphosate herbicide removal and adsorption process is analyzed using two isotherm models. Obtained adsorption capacities for all prepared composites lay between 45.2 and 92.2 mg of glyphosate per gram of investigated composite. Suspension acidity revealed that glyphosate is adsorbed mainly in the zwitter-ion form at the composite surface while the amount of potassium salt in the composites is crucial for the adsorption application. Exceptional adsorption behavior is postulated to come from a high degree of homogeneity among surface active sites which is confirmed by different experimental methods. Temperature programmed desorption of glyphosate coupled with mass spectrometer detected one broad, high-temperature peak which represents overlapped desorption processes from active sights of similar strength. Introduction of potassium tungstophosphate affects active sites present in BEA zeolite for glyphosate desorption and significantly increases the amount of adsorbed pesticide in comparison to BEA zeolite. Supporting of potassium tungstophosphate on BEA zeolite via in situ synthesis procedure enables the formation of highly efficient adsorbents and revealed their perspective environmental application. © 2019
T2  - Journal of Environmental Sciences
T1  - In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal
VL  - 81
SP  - 136
EP  - 147
DO  - 10.1016/j.jes.2019.01.018
ER  - 
@article{
author = "Vasiljević-Nedić, Bojana and Obradović, Milena and Bajuk-Bogdanović, Danica V. and Milojević-Rakić, Maja and Jovanović, Zoran M. and Gavrilov, Nemanja M. and Holclajtner-Antunović, Ivanka D.",
year = "2019",
abstract = "Potassium tungstophosphate is supported on BEA zeolite by in situ synthesis for glyphosate removal. Spectroscopic measurements identified hydrogen bonding as a primal interaction of potassium salt and BEA zeolite. Composites are evaluated for glyphosate herbicide removal and adsorption process is analyzed using two isotherm models. Obtained adsorption capacities for all prepared composites lay between 45.2 and 92.2 mg of glyphosate per gram of investigated composite. Suspension acidity revealed that glyphosate is adsorbed mainly in the zwitter-ion form at the composite surface while the amount of potassium salt in the composites is crucial for the adsorption application. Exceptional adsorption behavior is postulated to come from a high degree of homogeneity among surface active sites which is confirmed by different experimental methods. Temperature programmed desorption of glyphosate coupled with mass spectrometer detected one broad, high-temperature peak which represents overlapped desorption processes from active sights of similar strength. Introduction of potassium tungstophosphate affects active sites present in BEA zeolite for glyphosate desorption and significantly increases the amount of adsorbed pesticide in comparison to BEA zeolite. Supporting of potassium tungstophosphate on BEA zeolite via in situ synthesis procedure enables the formation of highly efficient adsorbents and revealed their perspective environmental application. © 2019",
journal = "Journal of Environmental Sciences",
title = "In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal",
volume = "81",
pages = "136-147",
doi = "10.1016/j.jes.2019.01.018"
}
Vasiljević-Nedić, B., Obradović, M., Bajuk-Bogdanović, D. V., Milojević-Rakić, M., Jovanović, Z. M., Gavrilov, N. M.,& Holclajtner-Antunović, I. D.. (2019). In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal. in Journal of Environmental Sciences, 81, 136-147.
https://doi.org/10.1016/j.jes.2019.01.018
Vasiljević-Nedić B, Obradović M, Bajuk-Bogdanović DV, Milojević-Rakić M, Jovanović ZM, Gavrilov NM, Holclajtner-Antunović ID. In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal. in Journal of Environmental Sciences. 2019;81:136-147.
doi:10.1016/j.jes.2019.01.018 .
Vasiljević-Nedić, Bojana, Obradović, Milena, Bajuk-Bogdanović, Danica V., Milojević-Rakić, Maja, Jovanović, Zoran M., Gavrilov, Nemanja M., Holclajtner-Antunović, Ivanka D., "In situ synthesis of potassium tungstophosphate supported on BEA zeolite and perspective application for pesticide removal" in Journal of Environmental Sciences, 81 (2019):136-147,
https://doi.org/10.1016/j.jes.2019.01.018 . .
11
9
10

Electrochemical investigation of ionic liquid-derived porous carbon materials for supercapacitors: pseudocapacitance versus electrical double layer

Zdolšek, Nikola; Rocha, Raquel P.; Krstić, Jugoslav B.; Trtić-Petrović, Tatjana M.; Šljukić, Biljana; Figueiredo, Jose L.; Vujković, Milica

(2019)

TY  - JOUR
AU  - Zdolšek, Nikola
AU  - Rocha, Raquel P.
AU  - Krstić, Jugoslav B.
AU  - Trtić-Petrović, Tatjana M.
AU  - Šljukić, Biljana
AU  - Figueiredo, Jose L.
AU  - Vujković, Milica
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0013468618328482
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8023
AB  - This work shows the potential application of carbon materials prepared by three different ionic liquid-based methods, using 1-butyl-3-methylimidazolium methanesulfonate [bmim][MeSO3], for electrochemical supercapacitors. The effects of [bmim][MeSO3] on morphology, texture and surface chemistry of prepared materials has been explored by SEM/TEM, N2/CO2 adsorption measurements and XPS. The results indicate the possibility of synthesis of carbon materials with tunable physicochemical properties using ionic liquid based methods. The charge storage behavior of all materials was studied in three different pH aqueous electrolytes. The pseudocapacitive and double layer contributions were estimated and discussed from the aspect of the textural changes and the changes of the chemical composition of surface functional groups containing heteroatoms. C[dbnd]O type functional groups, with the contribution of COOH groups, were found to be responsible for a different amount of charge, which could be stored in alkaline and acidic electrolytic solution. The material prepared by direct carbonization of [bmim][MeSO3], showed the best electrochemical performance in alkaline electrolyte with a capacitance of 187 F g−1 at 5 mV s−1 (or 148 F g−1 at 1 A g−1), due to the contribution of both electric-double layer capacitance and pseudocapacitance which arises from oxygen, nitrogen and sulfur functional groups. © 2018 Elsevier Ltd
T2  - Electrochimica Acta
T1  - Electrochemical investigation of ionic liquid-derived porous carbon materials for supercapacitors: pseudocapacitance versus electrical double layer
VL  - 298
SP  - 541
EP  - 551
DO  - 10.1016/j.electacta.2018.12.129
ER  - 
@article{
author = "Zdolšek, Nikola and Rocha, Raquel P. and Krstić, Jugoslav B. and Trtić-Petrović, Tatjana M. and Šljukić, Biljana and Figueiredo, Jose L. and Vujković, Milica",
year = "2019",
abstract = "This work shows the potential application of carbon materials prepared by three different ionic liquid-based methods, using 1-butyl-3-methylimidazolium methanesulfonate [bmim][MeSO3], for electrochemical supercapacitors. The effects of [bmim][MeSO3] on morphology, texture and surface chemistry of prepared materials has been explored by SEM/TEM, N2/CO2 adsorption measurements and XPS. The results indicate the possibility of synthesis of carbon materials with tunable physicochemical properties using ionic liquid based methods. The charge storage behavior of all materials was studied in three different pH aqueous electrolytes. The pseudocapacitive and double layer contributions were estimated and discussed from the aspect of the textural changes and the changes of the chemical composition of surface functional groups containing heteroatoms. C[dbnd]O type functional groups, with the contribution of COOH groups, were found to be responsible for a different amount of charge, which could be stored in alkaline and acidic electrolytic solution. The material prepared by direct carbonization of [bmim][MeSO3], showed the best electrochemical performance in alkaline electrolyte with a capacitance of 187 F g−1 at 5 mV s−1 (or 148 F g−1 at 1 A g−1), due to the contribution of both electric-double layer capacitance and pseudocapacitance which arises from oxygen, nitrogen and sulfur functional groups. © 2018 Elsevier Ltd",
journal = "Electrochimica Acta",
title = "Electrochemical investigation of ionic liquid-derived porous carbon materials for supercapacitors: pseudocapacitance versus electrical double layer",
volume = "298",
pages = "541-551",
doi = "10.1016/j.electacta.2018.12.129"
}
Zdolšek, N., Rocha, R. P., Krstić, J. B., Trtić-Petrović, T. M., Šljukić, B., Figueiredo, J. L.,& Vujković, M.. (2019). Electrochemical investigation of ionic liquid-derived porous carbon materials for supercapacitors: pseudocapacitance versus electrical double layer. in Electrochimica Acta, 298, 541-551.
https://doi.org/10.1016/j.electacta.2018.12.129
Zdolšek N, Rocha RP, Krstić JB, Trtić-Petrović TM, Šljukić B, Figueiredo JL, Vujković M. Electrochemical investigation of ionic liquid-derived porous carbon materials for supercapacitors: pseudocapacitance versus electrical double layer. in Electrochimica Acta. 2019;298:541-551.
doi:10.1016/j.electacta.2018.12.129 .
Zdolšek, Nikola, Rocha, Raquel P., Krstić, Jugoslav B., Trtić-Petrović, Tatjana M., Šljukić, Biljana, Figueiredo, Jose L., Vujković, Milica, "Electrochemical investigation of ionic liquid-derived porous carbon materials for supercapacitors: pseudocapacitance versus electrical double layer" in Electrochimica Acta, 298 (2019):541-551,
https://doi.org/10.1016/j.electacta.2018.12.129 . .
16
16
16

Tailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from?

Bajuk-Bogdanović, Danica V.; Holclajtner-Antunović, Ivanka D.; Jovanović, Zoran M.; Mravik, Željko; Krstić, Jugoslav B.; Uskoković-Marković, Snežana; Vujković, Milica

(2019)

TY  - JOUR
AU  - Bajuk-Bogdanović, Danica V.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Jovanović, Zoran M.
AU  - Mravik, Željko
AU  - Krstić, Jugoslav B.
AU  - Uskoković-Marković, Snežana
AU  - Vujković, Milica
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8500
AB  - The synergistic effects between two Keggin-type heteropoly acids (HPAs) and carbon surface were examined and elucidated. An improved high rate capability (and potential high capacitor electrode for supercapacitors) of the hybrid materials, obtained by anchoring of α-dodecamolybdophosphoric (MoPA), α-dodecatungstophosphoric (WPA), and their mixture to activated carbon (AC), was achieved through the different mechanism of interaction. In order to elaborate this, a detailed analysis of AC-HPA composites has been performed by scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) analysis, temperature-programmed desorption (TPD), Fourier-transform infrared spectroscopy (FTIR), micro Raman spectroscopy, and zeta potential measurements. The zeta potential measurements revealed positive charge of carbon surface thus indicating attractive interactions with negatively charged Keggin anion. The surface analysis has shown that WPA spontaneously reduces the carbon surface, while interaction with MoPA leads to its oxidation. As the consequence of the tailoring of the functional groups at carbon surface through HPAs’ action, the distortion of cyclic voltammograms (CVs) decreased in the following order: AC-MoPA, AC-MoPA-WPA, and AC-WPA. A prominent rectangular shape of AC-WPA, even at an extremely high scan rate of 400 mVs−1, was measured, which is rarely demonstrated for carbon-based composites. By applying the theory of electrode potentials, the HPA-AC synergistic effect was explained and discussed in terms of charge storage improvement of HPA-modified carbon. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
T2  - Journal of Solid State Electrochemistry
T1  - Tailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from?
VL  - 23
IS  - 9
SP  - 2747
EP  - 2758
DO  - 10.1007/s10008-019-04369-4
ER  - 
@article{
author = "Bajuk-Bogdanović, Danica V. and Holclajtner-Antunović, Ivanka D. and Jovanović, Zoran M. and Mravik, Željko and Krstić, Jugoslav B. and Uskoković-Marković, Snežana and Vujković, Milica",
year = "2019",
abstract = "The synergistic effects between two Keggin-type heteropoly acids (HPAs) and carbon surface were examined and elucidated. An improved high rate capability (and potential high capacitor electrode for supercapacitors) of the hybrid materials, obtained by anchoring of α-dodecamolybdophosphoric (MoPA), α-dodecatungstophosphoric (WPA), and their mixture to activated carbon (AC), was achieved through the different mechanism of interaction. In order to elaborate this, a detailed analysis of AC-HPA composites has been performed by scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) analysis, temperature-programmed desorption (TPD), Fourier-transform infrared spectroscopy (FTIR), micro Raman spectroscopy, and zeta potential measurements. The zeta potential measurements revealed positive charge of carbon surface thus indicating attractive interactions with negatively charged Keggin anion. The surface analysis has shown that WPA spontaneously reduces the carbon surface, while interaction with MoPA leads to its oxidation. As the consequence of the tailoring of the functional groups at carbon surface through HPAs’ action, the distortion of cyclic voltammograms (CVs) decreased in the following order: AC-MoPA, AC-MoPA-WPA, and AC-WPA. A prominent rectangular shape of AC-WPA, even at an extremely high scan rate of 400 mVs−1, was measured, which is rarely demonstrated for carbon-based composites. By applying the theory of electrode potentials, the HPA-AC synergistic effect was explained and discussed in terms of charge storage improvement of HPA-modified carbon. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.",
journal = "Journal of Solid State Electrochemistry",
title = "Tailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from?",
volume = "23",
number = "9",
pages = "2747-2758",
doi = "10.1007/s10008-019-04369-4"
}
Bajuk-Bogdanović, D. V., Holclajtner-Antunović, I. D., Jovanović, Z. M., Mravik, Ž., Krstić, J. B., Uskoković-Marković, S.,& Vujković, M.. (2019). Tailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from?. in Journal of Solid State Electrochemistry, 23(9), 2747-2758.
https://doi.org/10.1007/s10008-019-04369-4
Bajuk-Bogdanović DV, Holclajtner-Antunović ID, Jovanović ZM, Mravik Ž, Krstić JB, Uskoković-Marković S, Vujković M. Tailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from?. in Journal of Solid State Electrochemistry. 2019;23(9):2747-2758.
doi:10.1007/s10008-019-04369-4 .
Bajuk-Bogdanović, Danica V., Holclajtner-Antunović, Ivanka D., Jovanović, Zoran M., Mravik, Željko, Krstić, Jugoslav B., Uskoković-Marković, Snežana, Vujković, Milica, "Tailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from?" in Journal of Solid State Electrochemistry, 23, no. 9 (2019):2747-2758,
https://doi.org/10.1007/s10008-019-04369-4 . .
1
1
1

Coconut Shell Activated Carbon as Solid-Phase Extraction Adsorbent for Preconcentration of Selected Pesticides from Water Samples

Kumrić, Ksenija; Vujasin, Radojka; Egerić, Marija; Petrović, Đorđe; Devečerski, Aleksandar; Matović, Ljiljana

(2019)

TY  - JOUR
AU  - Kumrić, Ksenija
AU  - Vujasin, Radojka
AU  - Egerić, Marija
AU  - Petrović, Đorđe
AU  - Devečerski, Aleksandar
AU  - Matović, Ljiljana
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8678
AB  - Solid-phase extraction (SPE) on activated carbon derived from coconut shell (CSAC) for the preconcentration of four varying polarity pesticides (imidacloprid, acetamiprid, simazine, and linuron) prior to their determination using high performance liquid chromatography with diode array detector (HPLC-DAD) was investigated. The characteristics of the CSAC were analyzed through X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and Brunauer-Emmett-Teller (BET) method. The effects of the solution pH, eluent type, eluent volume, and flow rate were investigated for optimization of the presented procedure. The adsorption was achieved quantitatively on the CSAC column in the pH range of 2.0–7.0, and then the retained pesticides were eluted with dichloromethane. The detection limit was found to be 0.025–0.039 μg L−1, depending on the pesticide. The proposed SPE-CSAC method was used to determine selected pesticides in tap water samples. The recoveries ranged from 58.2 to 105.3%, with low relative standard deviations. The obtained results indicated that the CSAC could be efficiently used as a low cost alternative to commercially available SPE adsorbents for the determination of the varying polarity pesticides in environmental water samples at trace levels. © 2019, Springer Nature Switzerland AG.
T2  - Water, Air, & Soil Pollution
T1  - Coconut Shell Activated Carbon as Solid-Phase Extraction Adsorbent for Preconcentration of Selected Pesticides from Water Samples
VL  - 230
IS  - 12
SP  - 302
DO  - 10.1007/s11270-019-4359-7
ER  - 
@article{
author = "Kumrić, Ksenija and Vujasin, Radojka and Egerić, Marija and Petrović, Đorđe and Devečerski, Aleksandar and Matović, Ljiljana",
year = "2019",
abstract = "Solid-phase extraction (SPE) on activated carbon derived from coconut shell (CSAC) for the preconcentration of four varying polarity pesticides (imidacloprid, acetamiprid, simazine, and linuron) prior to their determination using high performance liquid chromatography with diode array detector (HPLC-DAD) was investigated. The characteristics of the CSAC were analyzed through X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and Brunauer-Emmett-Teller (BET) method. The effects of the solution pH, eluent type, eluent volume, and flow rate were investigated for optimization of the presented procedure. The adsorption was achieved quantitatively on the CSAC column in the pH range of 2.0–7.0, and then the retained pesticides were eluted with dichloromethane. The detection limit was found to be 0.025–0.039 μg L−1, depending on the pesticide. The proposed SPE-CSAC method was used to determine selected pesticides in tap water samples. The recoveries ranged from 58.2 to 105.3%, with low relative standard deviations. The obtained results indicated that the CSAC could be efficiently used as a low cost alternative to commercially available SPE adsorbents for the determination of the varying polarity pesticides in environmental water samples at trace levels. © 2019, Springer Nature Switzerland AG.",
journal = "Water, Air, & Soil Pollution",
title = "Coconut Shell Activated Carbon as Solid-Phase Extraction Adsorbent for Preconcentration of Selected Pesticides from Water Samples",
volume = "230",
number = "12",
pages = "302",
doi = "10.1007/s11270-019-4359-7"
}
Kumrić, K., Vujasin, R., Egerić, M., Petrović, Đ., Devečerski, A.,& Matović, L.. (2019). Coconut Shell Activated Carbon as Solid-Phase Extraction Adsorbent for Preconcentration of Selected Pesticides from Water Samples. in Water, Air, & Soil Pollution, 230(12), 302.
https://doi.org/10.1007/s11270-019-4359-7
Kumrić K, Vujasin R, Egerić M, Petrović Đ, Devečerski A, Matović L. Coconut Shell Activated Carbon as Solid-Phase Extraction Adsorbent for Preconcentration of Selected Pesticides from Water Samples. in Water, Air, & Soil Pollution. 2019;230(12):302.
doi:10.1007/s11270-019-4359-7 .
Kumrić, Ksenija, Vujasin, Radojka, Egerić, Marija, Petrović, Đorđe, Devečerski, Aleksandar, Matović, Ljiljana, "Coconut Shell Activated Carbon as Solid-Phase Extraction Adsorbent for Preconcentration of Selected Pesticides from Water Samples" in Water, Air, & Soil Pollution, 230, no. 12 (2019):302,
https://doi.org/10.1007/s11270-019-4359-7 . .
1
2
1
1

Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents

Dimitrijević, Aleksandra; Jocić, Ana; Zec, Nebojša; Tot, Aleksandar; Papović, Snežana; Gadžurić, Slobodan; Vraneš, Milan; Trtić-Petrović, Tatjana M.

(2019)

TY  - JOUR
AU  - Dimitrijević, Aleksandra
AU  - Jocić, Ana
AU  - Zec, Nebojša
AU  - Tot, Aleksandar
AU  - Papović, Snežana
AU  - Gadžurić, Slobodan
AU  - Vraneš, Milan
AU  - Trtić-Petrović, Tatjana M.
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8157
AB  - The novel aqueous biphasic systems based on symmetric imidazolium ionic liquids (IL-ABSs)for the extraction of toxic and resistive dyes from water was studied. The cation symmetricity of ILs strongly influence the outstanding ability of 1,3-dibutylimidazolium dicyanamide, [bbim][dca], to generate ABS with the exceptionally low amount of eco-friendly citrate salt. A remarkable potential of [bbim][dca]/citrate based ABS to remove Orange II from wastewater with concentration up to 1000 fold and efficiency above 99.4% in a single step was achieved. The improved safety of proposed method nominates it as promising future strategy for pollution prevention. © 2019 The Korean Society of Industrial and Engineering Chemistry
T2  - Journal of Industrial and Engineering Chemistry
T1  - Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents
VL  - 76
SP  - 500
EP  - 507
DO  - 10.1016/j.jiec.2019.04.017
ER  - 
@article{
author = "Dimitrijević, Aleksandra and Jocić, Ana and Zec, Nebojša and Tot, Aleksandar and Papović, Snežana and Gadžurić, Slobodan and Vraneš, Milan and Trtić-Petrović, Tatjana M.",
year = "2019",
abstract = "The novel aqueous biphasic systems based on symmetric imidazolium ionic liquids (IL-ABSs)for the extraction of toxic and resistive dyes from water was studied. The cation symmetricity of ILs strongly influence the outstanding ability of 1,3-dibutylimidazolium dicyanamide, [bbim][dca], to generate ABS with the exceptionally low amount of eco-friendly citrate salt. A remarkable potential of [bbim][dca]/citrate based ABS to remove Orange II from wastewater with concentration up to 1000 fold and efficiency above 99.4% in a single step was achieved. The improved safety of proposed method nominates it as promising future strategy for pollution prevention. © 2019 The Korean Society of Industrial and Engineering Chemistry",
journal = "Journal of Industrial and Engineering Chemistry",
title = "Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents",
volume = "76",
pages = "500-507",
doi = "10.1016/j.jiec.2019.04.017"
}
Dimitrijević, A., Jocić, A., Zec, N., Tot, A., Papović, S., Gadžurić, S., Vraneš, M.,& Trtić-Petrović, T. M.. (2019). Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents. in Journal of Industrial and Engineering Chemistry, 76, 500-507.
https://doi.org/10.1016/j.jiec.2019.04.017
Dimitrijević A, Jocić A, Zec N, Tot A, Papović S, Gadžurić S, Vraneš M, Trtić-Petrović TM. Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents. in Journal of Industrial and Engineering Chemistry. 2019;76:500-507.
doi:10.1016/j.jiec.2019.04.017 .
Dimitrijević, Aleksandra, Jocić, Ana, Zec, Nebojša, Tot, Aleksandar, Papović, Snežana, Gadžurić, Slobodan, Vraneš, Milan, Trtić-Petrović, Tatjana M., "Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents" in Journal of Industrial and Engineering Chemistry, 76 (2019):500-507,
https://doi.org/10.1016/j.jiec.2019.04.017 . .
6
6
7

Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents

Dimitrijević, Aleksandra; Jocić, Ana; Zec, Nebojša; Tot, Aleksandar; Papović, Snežana; Gadžurić, Slobodan; Vraneš, Milan; Trtić-Petrović, Tatjana M.

(2019)

TY  - JOUR
AU  - Dimitrijević, Aleksandra
AU  - Jocić, Ana
AU  - Zec, Nebojša
AU  - Tot, Aleksandar
AU  - Papović, Snežana
AU  - Gadžurić, Slobodan
AU  - Vraneš, Milan
AU  - Trtić-Petrović, Tatjana M.
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8168
AB  - The novel aqueous biphasic systems based on symmetric imidazolium ionic liquids (IL-ABSs)for the extraction of toxic and resistive dyes from water was studied. The cation symmetricity of ILs strongly influence the outstanding ability of 1,3-dibutylimidazolium dicyanamide, [bbim][dca], to generate ABS with the exceptionally low amount of eco-friendly citrate salt. A remarkable potential of [bbim][dca]/citrate based ABS to remove Orange II from wastewater with concentration up to 1000 fold and efficiency above 99.4% in a single step was achieved. The improved safety of proposed method nominates it as promising future strategy for pollution prevention.
T2  - Journal of Industrial and Engineering Chemistry
T1  - Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents
VL  - 76
SP  - 500
EP  - 507
DO  - 10.1016/j.jiec.2019.04.017
ER  - 
@article{
author = "Dimitrijević, Aleksandra and Jocić, Ana and Zec, Nebojša and Tot, Aleksandar and Papović, Snežana and Gadžurić, Slobodan and Vraneš, Milan and Trtić-Petrović, Tatjana M.",
year = "2019",
abstract = "The novel aqueous biphasic systems based on symmetric imidazolium ionic liquids (IL-ABSs)for the extraction of toxic and resistive dyes from water was studied. The cation symmetricity of ILs strongly influence the outstanding ability of 1,3-dibutylimidazolium dicyanamide, [bbim][dca], to generate ABS with the exceptionally low amount of eco-friendly citrate salt. A remarkable potential of [bbim][dca]/citrate based ABS to remove Orange II from wastewater with concentration up to 1000 fold and efficiency above 99.4% in a single step was achieved. The improved safety of proposed method nominates it as promising future strategy for pollution prevention.",
journal = "Journal of Industrial and Engineering Chemistry",
title = "Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents",
volume = "76",
pages = "500-507",
doi = "10.1016/j.jiec.2019.04.017"
}
Dimitrijević, A., Jocić, A., Zec, N., Tot, A., Papović, S., Gadžurić, S., Vraneš, M.,& Trtić-Petrović, T. M.. (2019). Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents. in Journal of Industrial and Engineering Chemistry, 76, 500-507.
https://doi.org/10.1016/j.jiec.2019.04.017
Dimitrijević A, Jocić A, Zec N, Tot A, Papović S, Gadžurić S, Vraneš M, Trtić-Petrović TM. Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents. in Journal of Industrial and Engineering Chemistry. 2019;76:500-507.
doi:10.1016/j.jiec.2019.04.017 .
Dimitrijević, Aleksandra, Jocić, Ana, Zec, Nebojša, Tot, Aleksandar, Papović, Snežana, Gadžurić, Slobodan, Vraneš, Milan, Trtić-Petrović, Tatjana M., "Improved single-step extraction performance of aqueous biphasic systems using novel symmetric ionic liquids for the decolorisation of toxic dye effluents" in Journal of Industrial and Engineering Chemistry, 76 (2019):500-507,
https://doi.org/10.1016/j.jiec.2019.04.017 . .
6
6
7

Colloids or powders: Which nanoparticle formulations do cells like more?

Uskoković, Vuk; Huynh, Eric; Tang, Sean; Jovanović, Sonja; Wu, Victoria

(2019)

TY  - JOUR
AU  - Uskoković, Vuk
AU  - Huynh, Eric
AU  - Tang, Sean
AU  - Jovanović, Sonja
AU  - Wu, Victoria
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0927776519303182
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8202
AB  - Understanding the difference in physicochemical properties and biological response between colloidal and powder formulations of identical materials is important before the given materials are used in a medical milieu. In this study we compared a set of biological effects of colloidal and powder formulations of composite nanoparticles comprising superparamagnetic iron oxide cores and silicate/carbon shells. Magnetic dipole interaction between adjacent nanoparticles was more pronounced in their powders than in their colloidal formulations. Nanoparticles delivered as powders were thus more responsive to the magnetic field, but exhibited reduced uptake in bone and brain cancer cells, including K7M2 osteosarcoma line and U87 and E297 glioblastoma lines. Specifically, while the alternate magnetic field elicited a more rapid heat generation in cell culture media supplemented with the magnetic powders, the nanoparticles dispersed in the same media were uptaken by the cancer cells more copiously. The cellular uptake proved to be more crucial in defining the effect on cell survival, given that suspended formulations elicited a greater degree of cancer cell death in the magnetic field compared to the powder-containing formulations. Because of this effect, colloidal formulations were able to target cancer cells more effectively than the powders: they reduced the viability of all three tested cancer cell lines to a significantly greater degree that the viability of the normal, MDCK-MDR1 cell line. It is concluded that better uptake profile can make up for the lower heating rate in the AC field and lead to a more effective magnetic hyperthermia therapy. These results also demonstrate that the direct delivery of ferrofluids is more optimal than the administration of their constitutive particles as powders. © 2019 Elsevier B.V.
T2  - Colloids and Surfaces B: Biointerfaces
T1  - Colloids or powders: Which nanoparticle formulations do cells like more?
VL  - 181
SP  - 39
EP  - 47
DO  - 10.1016/j.colsurfb.2019.05.019
ER  - 
@article{
author = "Uskoković, Vuk and Huynh, Eric and Tang, Sean and Jovanović, Sonja and Wu, Victoria",
year = "2019",
abstract = "Understanding the difference in physicochemical properties and biological response between colloidal and powder formulations of identical materials is important before the given materials are used in a medical milieu. In this study we compared a set of biological effects of colloidal and powder formulations of composite nanoparticles comprising superparamagnetic iron oxide cores and silicate/carbon shells. Magnetic dipole interaction between adjacent nanoparticles was more pronounced in their powders than in their colloidal formulations. Nanoparticles delivered as powders were thus more responsive to the magnetic field, but exhibited reduced uptake in bone and brain cancer cells, including K7M2 osteosarcoma line and U87 and E297 glioblastoma lines. Specifically, while the alternate magnetic field elicited a more rapid heat generation in cell culture media supplemented with the magnetic powders, the nanoparticles dispersed in the same media were uptaken by the cancer cells more copiously. The cellular uptake proved to be more crucial in defining the effect on cell survival, given that suspended formulations elicited a greater degree of cancer cell death in the magnetic field compared to the powder-containing formulations. Because of this effect, colloidal formulations were able to target cancer cells more effectively than the powders: they reduced the viability of all three tested cancer cell lines to a significantly greater degree that the viability of the normal, MDCK-MDR1 cell line. It is concluded that better uptake profile can make up for the lower heating rate in the AC field and lead to a more effective magnetic hyperthermia therapy. These results also demonstrate that the direct delivery of ferrofluids is more optimal than the administration of their constitutive particles as powders. © 2019 Elsevier B.V.",
journal = "Colloids and Surfaces B: Biointerfaces",
title = "Colloids or powders: Which nanoparticle formulations do cells like more?",
volume = "181",
pages = "39-47",
doi = "10.1016/j.colsurfb.2019.05.019"
}
Uskoković, V., Huynh, E., Tang, S., Jovanović, S.,& Wu, V.. (2019). Colloids or powders: Which nanoparticle formulations do cells like more?. in Colloids and Surfaces B: Biointerfaces, 181, 39-47.
https://doi.org/10.1016/j.colsurfb.2019.05.019
Uskoković V, Huynh E, Tang S, Jovanović S, Wu V. Colloids or powders: Which nanoparticle formulations do cells like more?. in Colloids and Surfaces B: Biointerfaces. 2019;181:39-47.
doi:10.1016/j.colsurfb.2019.05.019 .
Uskoković, Vuk, Huynh, Eric, Tang, Sean, Jovanović, Sonja, Wu, Victoria, "Colloids or powders: Which nanoparticle formulations do cells like more?" in Colloids and Surfaces B: Biointerfaces, 181 (2019):39-47,
https://doi.org/10.1016/j.colsurfb.2019.05.019 . .
4
4
4

Zn-doped cobalt ferrite: Tuning the interactions by chemical composition

Muscas, Giuseppe; Jovanović, Sonja; Vukomanović, Marija; Spreitzer, Matjaž; Peddis, Davide

(2019)

TY  - JOUR
AU  - Muscas, Giuseppe
AU  - Jovanović, Sonja
AU  - Vukomanović, Marija
AU  - Spreitzer, Matjaž
AU  - Peddis, Davide
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0925838819316147
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8194
AB  - Magnetic nanoparticles represent complex but very interesting objects. They combine the bulk properties with novel phenomena emerging at the nanoscale due to finite-size effects. The recent development of the synthetic procedures allows having a strong control on the size and shape of individual particles and on their physical-chemical structure. Among different magnetic materials, spinel ferrite nanoparticles offer strong chemical and physical stability as well as tunable magnetic properties. In the present article, we investigate the effect of Zn substitution in cobalt ferrite nanoparticles. The technological development of nanoparticle-based magnetic materials aims to find a balance between a well-defined magnetic behavior of individual elements and their strong interactions, which arise from the need of miniaturization that leads to dense ensembles of the system's constituents. Within this complex context, we provide one route to optimize the properties of small spinel ferrite particles by tuning their chemical composition without compromise their structural properties, and with full control of their size and shape. Furthermore, we propose an advanced analysis of their magnetic properties in the framework of the random anisotropy model. We will show that the chemical composition not only determines the intrinsic anisotropy energy of each nanoparticle but also owns a profound effect on the interparticle interactions. © 2019 Elsevier B.V.
T2  - Journal of Alloys and Compounds
T1  - Zn-doped cobalt ferrite: Tuning the interactions by chemical composition
VL  - 796
SP  - 203
EP  - 209
DO  - 10.1016/j.jallcom.2019.04.308
ER  - 
@article{
author = "Muscas, Giuseppe and Jovanović, Sonja and Vukomanović, Marija and Spreitzer, Matjaž and Peddis, Davide",
year = "2019",
abstract = "Magnetic nanoparticles represent complex but very interesting objects. They combine the bulk properties with novel phenomena emerging at the nanoscale due to finite-size effects. The recent development of the synthetic procedures allows having a strong control on the size and shape of individual particles and on their physical-chemical structure. Among different magnetic materials, spinel ferrite nanoparticles offer strong chemical and physical stability as well as tunable magnetic properties. In the present article, we investigate the effect of Zn substitution in cobalt ferrite nanoparticles. The technological development of nanoparticle-based magnetic materials aims to find a balance between a well-defined magnetic behavior of individual elements and their strong interactions, which arise from the need of miniaturization that leads to dense ensembles of the system's constituents. Within this complex context, we provide one route to optimize the properties of small spinel ferrite particles by tuning their chemical composition without compromise their structural properties, and with full control of their size and shape. Furthermore, we propose an advanced analysis of their magnetic properties in the framework of the random anisotropy model. We will show that the chemical composition not only determines the intrinsic anisotropy energy of each nanoparticle but also owns a profound effect on the interparticle interactions. © 2019 Elsevier B.V.",
journal = "Journal of Alloys and Compounds",
title = "Zn-doped cobalt ferrite: Tuning the interactions by chemical composition",
volume = "796",
pages = "203-209",
doi = "10.1016/j.jallcom.2019.04.308"
}
Muscas, G., Jovanović, S., Vukomanović, M., Spreitzer, M.,& Peddis, D.. (2019). Zn-doped cobalt ferrite: Tuning the interactions by chemical composition. in Journal of Alloys and Compounds, 796, 203-209.
https://doi.org/10.1016/j.jallcom.2019.04.308
Muscas G, Jovanović S, Vukomanović M, Spreitzer M, Peddis D. Zn-doped cobalt ferrite: Tuning the interactions by chemical composition. in Journal of Alloys and Compounds. 2019;796:203-209.
doi:10.1016/j.jallcom.2019.04.308 .
Muscas, Giuseppe, Jovanović, Sonja, Vukomanović, Marija, Spreitzer, Matjaž, Peddis, Davide, "Zn-doped cobalt ferrite: Tuning the interactions by chemical composition" in Journal of Alloys and Compounds, 796 (2019):203-209,
https://doi.org/10.1016/j.jallcom.2019.04.308 . .
17
16
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Phase transitions in higher-melting imidazolium-based ionic liquids: Experiments and advanced data analysis

Čanji, Maja; Bendova, Magdalena; Bogdanov, Milen G.; Wagner, Zdenek; Zdolšek, Nikola; Quirion, François; Jandová, Věra; Vrbka, Pavel

(2019)

TY  - JOUR
AU  - Čanji, Maja
AU  - Bendova, Magdalena
AU  - Bogdanov, Milen G.
AU  - Wagner, Zdenek
AU  - Zdolšek, Nikola
AU  - Quirion, François
AU  - Jandová, Věra
AU  - Vrbka, Pavel
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8423
AB  - As thermal energy storage becomes an increasingly important topic, good knowledge of properties of phase-change materials (PCM) is essential. Among other properties, a good PCM should show a large enthalpy of melting, reproducible melting/solidification cycles, and long-term thermal stability. Temperatures and enthalpies of fusion should be determined at a possibly large range of conditions to allow for a critical evaluation of the experimental data and assessment of the material application potential. In this work, imidazolium-based ionic liquids (ILs) with long alkyl chain substituents 1-hexadecyl-3-methylimidazolium chloride and 1-hexadecyl-3-methyl-imidazolium saccharinate were studied in view of their possible use as phase-change materials. Differential scanning calorimetry (DSC) and the heat-leak modulus (HLM) methods were used to determine the temperatures and the enthalpies of phase transitions in the studied ILs, enabling us to study the influence of the heating and cooling rates on the measured properties. Enthalpies of fusion near to or larger than 100 J·g−1 were found in the studied ionic liquids, making them promising candidates for thermal energy storage. Peaks corresponding to possible liquid crystalline phases in the DSC traces of 1-hexadecyl-3-methylimidazolium saccharinate were observed, pointing to more complex phase behaviour of the studied ionic liquids. Finally, to critically evaluate the experimental data measured in this work, methods based on mathematical gnostics were used. Repeatability of measurements and the degree of mutual agreement between the methods used in this work could thus be determined. © 2019 Elsevier B.V.
T2  - Journal of Molecular Liquids
T1  - Phase transitions in higher-melting imidazolium-based ionic liquids: Experiments and advanced data analysis
VL  - 292
SP  - 111222
DO  - 10.1016/j.molliq.2019.111222
ER  - 
@article{
author = "Čanji, Maja and Bendova, Magdalena and Bogdanov, Milen G. and Wagner, Zdenek and Zdolšek, Nikola and Quirion, François and Jandová, Věra and Vrbka, Pavel",
year = "2019",
abstract = "As thermal energy storage becomes an increasingly important topic, good knowledge of properties of phase-change materials (PCM) is essential. Among other properties, a good PCM should show a large enthalpy of melting, reproducible melting/solidification cycles, and long-term thermal stability. Temperatures and enthalpies of fusion should be determined at a possibly large range of conditions to allow for a critical evaluation of the experimental data and assessment of the material application potential. In this work, imidazolium-based ionic liquids (ILs) with long alkyl chain substituents 1-hexadecyl-3-methylimidazolium chloride and 1-hexadecyl-3-methyl-imidazolium saccharinate were studied in view of their possible use as phase-change materials. Differential scanning calorimetry (DSC) and the heat-leak modulus (HLM) methods were used to determine the temperatures and the enthalpies of phase transitions in the studied ILs, enabling us to study the influence of the heating and cooling rates on the measured properties. Enthalpies of fusion near to or larger than 100 J·g−1 were found in the studied ionic liquids, making them promising candidates for thermal energy storage. Peaks corresponding to possible liquid crystalline phases in the DSC traces of 1-hexadecyl-3-methylimidazolium saccharinate were observed, pointing to more complex phase behaviour of the studied ionic liquids. Finally, to critically evaluate the experimental data measured in this work, methods based on mathematical gnostics were used. Repeatability of measurements and the degree of mutual agreement between the methods used in this work could thus be determined. © 2019 Elsevier B.V.",
journal = "Journal of Molecular Liquids",
title = "Phase transitions in higher-melting imidazolium-based ionic liquids: Experiments and advanced data analysis",
volume = "292",
pages = "111222",
doi = "10.1016/j.molliq.2019.111222"
}
Čanji, M., Bendova, M., Bogdanov, M. G., Wagner, Z., Zdolšek, N., Quirion, F., Jandová, V.,& Vrbka, P.. (2019). Phase transitions in higher-melting imidazolium-based ionic liquids: Experiments and advanced data analysis. in Journal of Molecular Liquids, 292, 111222.
https://doi.org/10.1016/j.molliq.2019.111222
Čanji M, Bendova M, Bogdanov MG, Wagner Z, Zdolšek N, Quirion F, Jandová V, Vrbka P. Phase transitions in higher-melting imidazolium-based ionic liquids: Experiments and advanced data analysis. in Journal of Molecular Liquids. 2019;292:111222.
doi:10.1016/j.molliq.2019.111222 .
Čanji, Maja, Bendova, Magdalena, Bogdanov, Milen G., Wagner, Zdenek, Zdolšek, Nikola, Quirion, François, Jandová, Věra, Vrbka, Pavel, "Phase transitions in higher-melting imidazolium-based ionic liquids: Experiments and advanced data analysis" in Journal of Molecular Liquids, 292 (2019):111222,
https://doi.org/10.1016/j.molliq.2019.111222 . .
3
3
3

Hydrogen Absorption in Pd–Ag Systems: A TPD and Electrical Resistivity Study

Pozio, Alfonso; Jovanović, Zoran M.; Tosti, Silvano

(2019)

TY  - JOUR
AU  - Pozio, Alfonso
AU  - Jovanović, Zoran M.
AU  - Tosti, Silvano
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8593
AB  - Hydrogen retention in Pd–Ag (silver 21 wt. %) thin foil has been tested by means of temperature-programmed desorption (TPD) in the temperature range 25–200 °C and compared to the resistivity measurements for the purpose of explaining the characteristic S-shaped resistivity curve and its minimum observed in the same temperature range. The TPD results indicated that the highest uptake of hydrogen was between 65 °C and 105 °C, with a maximum at ~85 °C. Furthermore, in all examined cases, the hydrogen desorption peak was between 140 °C and 180 °C. The resistivity measurements in argon, hydrogen, and vacuum allowed us to examine the influence of hydrogen on the resistivity of a Pd–Ag alloy. The results showed evidence of two kinds of hydrides: (1) a weak absorption at low temperature (T < 70 °C) with the hydrogen present mainly in tetrahedral sites, and (2) a strong absorption up to 150 °C with the hydrogen present mainly in octahedral sites. The behaviour of the electrical resistivity and the minimum between 90 °C and 110 °C can be explained by the two kinds of hydrogen uploaded into the metal lattice.
T2  - Materials
T1  - Hydrogen Absorption in Pd–Ag Systems: A TPD and Electrical Resistivity Study
VL  - 12
IS  - 19
SP  - 3160
DO  - 10.3390/ma12193160
ER  - 
@article{
author = "Pozio, Alfonso and Jovanović, Zoran M. and Tosti, Silvano",
year = "2019",
abstract = "Hydrogen retention in Pd–Ag (silver 21 wt. %) thin foil has been tested by means of temperature-programmed desorption (TPD) in the temperature range 25–200 °C and compared to the resistivity measurements for the purpose of explaining the characteristic S-shaped resistivity curve and its minimum observed in the same temperature range. The TPD results indicated that the highest uptake of hydrogen was between 65 °C and 105 °C, with a maximum at ~85 °C. Furthermore, in all examined cases, the hydrogen desorption peak was between 140 °C and 180 °C. The resistivity measurements in argon, hydrogen, and vacuum allowed us to examine the influence of hydrogen on the resistivity of a Pd–Ag alloy. The results showed evidence of two kinds of hydrides: (1) a weak absorption at low temperature (T < 70 °C) with the hydrogen present mainly in tetrahedral sites, and (2) a strong absorption up to 150 °C with the hydrogen present mainly in octahedral sites. The behaviour of the electrical resistivity and the minimum between 90 °C and 110 °C can be explained by the two kinds of hydrogen uploaded into the metal lattice.",
journal = "Materials",
title = "Hydrogen Absorption in Pd–Ag Systems: A TPD and Electrical Resistivity Study",
volume = "12",
number = "19",
pages = "3160",
doi = "10.3390/ma12193160"
}
Pozio, A., Jovanović, Z. M.,& Tosti, S.. (2019). Hydrogen Absorption in Pd–Ag Systems: A TPD and Electrical Resistivity Study. in Materials, 12(19), 3160.
https://doi.org/10.3390/ma12193160
Pozio A, Jovanović ZM, Tosti S. Hydrogen Absorption in Pd–Ag Systems: A TPD and Electrical Resistivity Study. in Materials. 2019;12(19):3160.
doi:10.3390/ma12193160 .
Pozio, Alfonso, Jovanović, Zoran M., Tosti, Silvano, "Hydrogen Absorption in Pd–Ag Systems: A TPD and Electrical Resistivity Study" in Materials, 12, no. 19 (2019):3160,
https://doi.org/10.3390/ma12193160 . .
1
1
1