TY  - JOUR
AU  - Matović, Ljiljana
AU  - Vukelić, Nikola
AU  - Jovanović, Uroš D.
AU  - Kumrić, Ksenija
AU  - Krstić, Jugoslav
AU  - Babić, Biljana M.
AU  - Đukić, Anđelka B.
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3858
AB  - Modified activated carbon cloth is prepared by mechanochemical modification of viscose rayon carbon cloth. The effects of different milling atmospheres, in the air and inert conditions, were investigated. Changes in kind and number of acidic and basic surface groups on the surface of activated carbon cloth, upon modification, as well as before and after the sorption of arsenic were determined. Higher number of basic groups responsible for the removal of arsenic ions was achieved by modification under inert conditions. Breakage and collapse of cylindrical fibers, decrease of particle sizes, change in the shape and consistency of the particles, as well as increase of microstructural disorder i.e. the loss of turbostratic structure occurred upon milling. pHPZC values increased from 4.46 to 5.04 and 5.77 after the air and inert milling, respectively. Adsorption followed pseudo second order kinetics with chemisorption as rate-controlling step. Langmuir isotherm best fit the equilibrium data and maximum adsorption capacity is 5.5 mg g−1 at a pH value close to 7.0, typical for groundwater. The mechanism of arsenic adsorption onto activated carbon cloth milled in inert atmosphere involved electrostatic and dispersive interactions between arsenic ions and carbon particles in wide pH range (from 2 to 10).
PB  - Elsevier
T2  - Arabian Journal of Chemistry
T1  - Mechanochemically improved surface properties of activated carbon cloth for the removal of As(V) from aqueous solutions
VL  - 12
IS  - 8
SP  - 4446
EP  - 4457
DO  - 10.1016/j.arabjc.2016.07.004
ER  - 

@article{
author = "Matović, Ljiljana and Vukelić, Nikola and Jovanović, Uroš D. and Kumrić, Ksenija and Krstić, Jugoslav and Babić, Biljana M. and Đukić, Anđelka B.",
year = "2019",
abstract = "Modified activated carbon cloth is prepared by mechanochemical modification of viscose rayon carbon cloth. The effects of different milling atmospheres, in the air and inert conditions, were investigated. Changes in kind and number of acidic and basic surface groups on the surface of activated carbon cloth, upon modification, as well as before and after the sorption of arsenic were determined. Higher number of basic groups responsible for the removal of arsenic ions was achieved by modification under inert conditions. Breakage and collapse of cylindrical fibers, decrease of particle sizes, change in the shape and consistency of the particles, as well as increase of microstructural disorder i.e. the loss of turbostratic structure occurred upon milling. pHPZC values increased from 4.46 to 5.04 and 5.77 after the air and inert milling, respectively. Adsorption followed pseudo second order kinetics with chemisorption as rate-controlling step. Langmuir isotherm best fit the equilibrium data and maximum adsorption capacity is 5.5 mg g−1 at a pH value close to 7.0, typical for groundwater. The mechanism of arsenic adsorption onto activated carbon cloth milled in inert atmosphere involved electrostatic and dispersive interactions between arsenic ions and carbon particles in wide pH range (from 2 to 10).",
publisher = "Elsevier",
journal = "Arabian Journal of Chemistry",
title = "Mechanochemically improved surface properties of activated carbon cloth for the removal of As(V) from aqueous solutions",
volume = "12",
number = "8",
pages = "4446-4457",
doi = "10.1016/j.arabjc.2016.07.004"
}

Matović, L., Vukelić, N., Jovanović, U. D., Kumrić, K., Krstić, J., Babić, B. M.,& Đukić, A. B.. (2019). Mechanochemically improved surface properties of activated carbon cloth for the removal of As(V) from aqueous solutions. in Arabian Journal of Chemistry
Elsevier., 12(8), 4446-4457.
https://doi.org/10.1016/j.arabjc.2016.07.004

Matović L, Vukelić N, Jovanović UD, Kumrić K, Krstić J, Babić BM, Đukić AB. Mechanochemically improved surface properties of activated carbon cloth for the removal of As(V) from aqueous solutions. in Arabian Journal of Chemistry. 2019;12(8):4446-4457.
doi:10.1016/j.arabjc.2016.07.004 .

Matović, Ljiljana, Vukelić, Nikola, Jovanović, Uroš D., Kumrić, Ksenija, Krstić, Jugoslav, Babić, Biljana M., Đukić, Anđelka B., "Mechanochemically improved surface properties of activated carbon cloth for the removal of As(V) from aqueous solutions" in Arabian Journal of Chemistry, 12, no. 8 (2019):4446-4457,
https://doi.org/10.1016/j.arabjc.2016.07.004 . .

TY  - JOUR
AU  - Vujković, Milica
AU  - Matovic, Ljiljana
AU  - Krstić, Jugoslav
AU  - Stojmenović, Marija
AU  - Dukić, Andelka
AU  - Babić, Biljana M.
AU  - Mentus, Slavko
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2135
AB  - The activated carbon cloth (ACC), obtained by chemical/physical activation of carbonized rayon fibers, was grinded in a ball mill and studied from the aspect of double layer capacitance. The changes in pore structure, morphology and acid/basic properties caused by ball milling were studied by means of N-2 adsorption/desorption, Fourier-transformed infrared spectrometry, Boehm's titration and Scanning Electron Microscopy. Both potentiodynamic and galvanostatic cycling were used to evaluate the double layer capacitance in three alkaline, acidic and neutral aqueous solutions (KOH, H2SO4 and Na2SO4). While double layer capacitance of original ACC was found to be negligible, ball milled material (ACCm) displayed capacitance in the range of supercapacitors. In order to explain this huge capacitance improvement, we found that ball milling substantially increased the concentration of lactone, phenolic and quinone groups on the surface. We suggest that these groups, through improved hydrophilicity, enable faster ion diffusion into carbon micropores. The energy density stored by double layer was highest in neutral sodium sulphate solution. Namely, operational voltage of similar to 2 V and double layer capacitance of 220 F g(-1) at 1A g(-1), enable the energy density of ACCm/Na2SO4/ACCm capacitor of 31.7 Wh kg(-1) at 2000 W kg(-1), much higher than that of commercial EDLC carbon capacitors. According to the here presented literature survey in a tabular form, the energy density of the studied sample is also higher from that of numerous thus far published aqueous carbon capacitors.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Electrochimica Acta
T1  - Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions
VL  - 245
SP  - 796
EP  - 806
DO  - 10.1016/j.electacta.2017.06.018
ER  - 

@article{
author = "Vujković, Milica and Matovic, Ljiljana and Krstić, Jugoslav and Stojmenović, Marija and Dukić, Andelka and Babić, Biljana M. and Mentus, Slavko",
year = "2017",
abstract = "The activated carbon cloth (ACC), obtained by chemical/physical activation of carbonized rayon fibers, was grinded in a ball mill and studied from the aspect of double layer capacitance. The changes in pore structure, morphology and acid/basic properties caused by ball milling were studied by means of N-2 adsorption/desorption, Fourier-transformed infrared spectrometry, Boehm's titration and Scanning Electron Microscopy. Both potentiodynamic and galvanostatic cycling were used to evaluate the double layer capacitance in three alkaline, acidic and neutral aqueous solutions (KOH, H2SO4 and Na2SO4). While double layer capacitance of original ACC was found to be negligible, ball milled material (ACCm) displayed capacitance in the range of supercapacitors. In order to explain this huge capacitance improvement, we found that ball milling substantially increased the concentration of lactone, phenolic and quinone groups on the surface. We suggest that these groups, through improved hydrophilicity, enable faster ion diffusion into carbon micropores. The energy density stored by double layer was highest in neutral sodium sulphate solution. Namely, operational voltage of similar to 2 V and double layer capacitance of 220 F g(-1) at 1A g(-1), enable the energy density of ACCm/Na2SO4/ACCm capacitor of 31.7 Wh kg(-1) at 2000 W kg(-1), much higher than that of commercial EDLC carbon capacitors. According to the here presented literature survey in a tabular form, the energy density of the studied sample is also higher from that of numerous thus far published aqueous carbon capacitors.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Electrochimica Acta",
title = "Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions",
volume = "245",
pages = "796-806",
doi = "10.1016/j.electacta.2017.06.018"
}

Vujković, M., Matovic, L., Krstić, J., Stojmenović, M., Dukić, A., Babić, B. M.,& Mentus, S.. (2017). Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions. in Electrochimica Acta
Oxford : Pergamon-Elsevier Science Ltd., 245, 796-806.
https://doi.org/10.1016/j.electacta.2017.06.018

Vujković M, Matovic L, Krstić J, Stojmenović M, Dukić A, Babić BM, Mentus S. Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions. in Electrochimica Acta. 2017;245:796-806.
doi:10.1016/j.electacta.2017.06.018 .

Vujković, Milica, Matovic, Ljiljana, Krstić, Jugoslav, Stojmenović, Marija, Dukić, Andelka, Babić, Biljana M., Mentus, Slavko, "Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions" in Electrochimica Acta, 245 (2017):796-806,
https://doi.org/10.1016/j.electacta.2017.06.018 . .

TY  - JOUR
AU  - Vujković, Milica
AU  - Matovic, Ljiljana
AU  - Krstić, Jugoslav
AU  - Stojmenović, Marija
AU  - Dukić, Andelka
AU  - Babić, Biljana M.
AU  - Mentus, Slavko
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3011
AB  - The activated carbon cloth (ACC), obtained by chemical/physical activation of carbonized rayon fibers, was grinded in a ball mill and studied from the aspect of double layer capacitance. The changes in pore structure, morphology and acid/basic properties caused by ball milling were studied by means of N-2 adsorption/desorption, Fourier-transformed infrared spectrometry, Boehm's titration and Scanning Electron Microscopy. Both potentiodynamic and galvanostatic cycling were used to evaluate the double layer capacitance in three alkaline, acidic and neutral aqueous solutions (KOH, H2SO4 and Na2SO4). While double layer capacitance of original ACC was found to be negligible, ball milled material (ACCm) displayed capacitance in the range of supercapacitors. In order to explain this huge capacitance improvement, we found that ball milling substantially increased the concentration of lactone, phenolic and quinone groups on the surface. We suggest that these groups, through improved hydrophilicity, enable faster ion diffusion into carbon micropores. The energy density stored by double layer was highest in neutral sodium sulphate solution. Namely, operational voltage of similar to 2 V and double layer capacitance of 220 F g(-1) at 1A g(-1), enable the energy density of ACCm/Na2SO4/ACCm capacitor of 31.7 Wh kg(-1) at 2000 W kg(-1), much higher than that of commercial EDLC carbon capacitors. According to the here presented literature survey in a tabular form, the energy density of the studied sample is also higher from that of numerous thus far published aqueous carbon capacitors.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Electrochimica Acta
T1  - Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions
VL  - 245
SP  - 796
EP  - 806
DO  - 10.1016/j.electacta.2017.06.018
ER  - 

@article{
author = "Vujković, Milica and Matovic, Ljiljana and Krstić, Jugoslav and Stojmenović, Marija and Dukić, Andelka and Babić, Biljana M. and Mentus, Slavko",
year = "2017",
abstract = "The activated carbon cloth (ACC), obtained by chemical/physical activation of carbonized rayon fibers, was grinded in a ball mill and studied from the aspect of double layer capacitance. The changes in pore structure, morphology and acid/basic properties caused by ball milling were studied by means of N-2 adsorption/desorption, Fourier-transformed infrared spectrometry, Boehm's titration and Scanning Electron Microscopy. Both potentiodynamic and galvanostatic cycling were used to evaluate the double layer capacitance in three alkaline, acidic and neutral aqueous solutions (KOH, H2SO4 and Na2SO4). While double layer capacitance of original ACC was found to be negligible, ball milled material (ACCm) displayed capacitance in the range of supercapacitors. In order to explain this huge capacitance improvement, we found that ball milling substantially increased the concentration of lactone, phenolic and quinone groups on the surface. We suggest that these groups, through improved hydrophilicity, enable faster ion diffusion into carbon micropores. The energy density stored by double layer was highest in neutral sodium sulphate solution. Namely, operational voltage of similar to 2 V and double layer capacitance of 220 F g(-1) at 1A g(-1), enable the energy density of ACCm/Na2SO4/ACCm capacitor of 31.7 Wh kg(-1) at 2000 W kg(-1), much higher than that of commercial EDLC carbon capacitors. According to the here presented literature survey in a tabular form, the energy density of the studied sample is also higher from that of numerous thus far published aqueous carbon capacitors.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Electrochimica Acta",
title = "Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions",
volume = "245",
pages = "796-806",
doi = "10.1016/j.electacta.2017.06.018"
}

Vujković, M., Matovic, L., Krstić, J., Stojmenović, M., Dukić, A., Babić, B. M.,& Mentus, S.. (2017). Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions. in Electrochimica Acta
Oxford : Pergamon-Elsevier Science Ltd., 245, 796-806.
https://doi.org/10.1016/j.electacta.2017.06.018

Vujković M, Matovic L, Krstić J, Stojmenović M, Dukić A, Babić BM, Mentus S. Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions. in Electrochimica Acta. 2017;245:796-806.
doi:10.1016/j.electacta.2017.06.018 .

Vujković, Milica, Matovic, Ljiljana, Krstić, Jugoslav, Stojmenović, Marija, Dukić, Andelka, Babić, Biljana M., Mentus, Slavko, "Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions" in Electrochimica Acta, 245 (2017):796-806,
https://doi.org/10.1016/j.electacta.2017.06.018 . .

TY  - JOUR
AU  - Sljivic-Ivanovic, M
AU  - Smiciklas, I
AU  - Milenkovic, A
AU  - Dojčinović, Biljana
AU  - Babić, Biljana M.
AU  - Mitrić, Miodrag
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1741
AB  - Animal bones have been studied as a resource of low-crystalline apatite for immobilization of toxic heavy metals. Chemical and thermal treatments can be applied for selective removal of bone organic constituents. In this study, the impact of different treatment factors was determined by experimental design methodology, and comparison of the estimated effects was performed in order to optimize the treatment conditions. Fractional factorial design with five variables at two levels was applied for factors screening. The type of chemical reagent (H2O2 or NaOH), its concentration (0.1 or 2 mol/L), reaction temperature (20 or 60 degrees C), contact time (1 or 3 h) and sample annealing (without or at 400 degrees C) were considered as process variables. Structural properties of bone sorbents, loss of ignition, point of zero charge, surface functional groups, specific surface area, chemical composition, and Cd2+ sorption efficiency, were selected as system responses. Samples significantly differed in respect to the organic phase content and composition, thus mechanisms of Cd2+ sorption were complex. Statistical analysis has revealed that, between all studied factors, temperature treatment was the most important for sorbents increased specific surface area, porosity and cation sorption. Furthermore, NaOH was more effective than H2O2, while the effects produced by variation of other factors were less pronounced. The highest proportion of bio-apatite with desired low crystallinity and high specific surface area was achieved by synergetic effects of chemical treatment with NaOH and thermal treatment at 400 degrees C.
PB  - Springer, New York
T2  - Journal of Materials Science
T1  - Evaluation of the effects of treatment factors on the properties of bio-apatite materials
VL  - 50
IS  - 1
SP  - 354
EP  - 365
DO  - 10.1007/s10853-014-8594-4
ER  - 

@article{
author = "Sljivic-Ivanovic, M and Smiciklas, I and Milenkovic, A and Dojčinović, Biljana and Babić, Biljana M. and Mitrić, Miodrag",
year = "2015",
abstract = "Animal bones have been studied as a resource of low-crystalline apatite for immobilization of toxic heavy metals. Chemical and thermal treatments can be applied for selective removal of bone organic constituents. In this study, the impact of different treatment factors was determined by experimental design methodology, and comparison of the estimated effects was performed in order to optimize the treatment conditions. Fractional factorial design with five variables at two levels was applied for factors screening. The type of chemical reagent (H2O2 or NaOH), its concentration (0.1 or 2 mol/L), reaction temperature (20 or 60 degrees C), contact time (1 or 3 h) and sample annealing (without or at 400 degrees C) were considered as process variables. Structural properties of bone sorbents, loss of ignition, point of zero charge, surface functional groups, specific surface area, chemical composition, and Cd2+ sorption efficiency, were selected as system responses. Samples significantly differed in respect to the organic phase content and composition, thus mechanisms of Cd2+ sorption were complex. Statistical analysis has revealed that, between all studied factors, temperature treatment was the most important for sorbents increased specific surface area, porosity and cation sorption. Furthermore, NaOH was more effective than H2O2, while the effects produced by variation of other factors were less pronounced. The highest proportion of bio-apatite with desired low crystallinity and high specific surface area was achieved by synergetic effects of chemical treatment with NaOH and thermal treatment at 400 degrees C.",
publisher = "Springer, New York",
journal = "Journal of Materials Science",
title = "Evaluation of the effects of treatment factors on the properties of bio-apatite materials",
volume = "50",
number = "1",
pages = "354-365",
doi = "10.1007/s10853-014-8594-4"
}

Sljivic-Ivanovic, M., Smiciklas, I., Milenkovic, A., Dojčinović, B., Babić, B. M.,& Mitrić, M.. (2015). Evaluation of the effects of treatment factors on the properties of bio-apatite materials. in Journal of Materials Science
Springer, New York., 50(1), 354-365.
https://doi.org/10.1007/s10853-014-8594-4

Sljivic-Ivanovic M, Smiciklas I, Milenkovic A, Dojčinović B, Babić BM, Mitrić M. Evaluation of the effects of treatment factors on the properties of bio-apatite materials. in Journal of Materials Science. 2015;50(1):354-365.
doi:10.1007/s10853-014-8594-4 .

Sljivic-Ivanovic, M, Smiciklas, I, Milenkovic, A, Dojčinović, Biljana, Babić, Biljana M., Mitrić, Miodrag, "Evaluation of the effects of treatment factors on the properties of bio-apatite materials" in Journal of Materials Science, 50, no. 1 (2015):354-365,
https://doi.org/10.1007/s10853-014-8594-4 . .

TY  - JOUR
AU  - Tomić, Nataša M.
AU  - Dohcevic-Mitrovic, Zorana D
AU  - Paunović, Novica M
AU  - Mijin, Dušan
AU  - Radić, Nenad
AU  - Grbić, Boško
AU  - Askrabic, Sonja M
AU  - Babić, Biljana M.
AU  - Bajuk-Bogdanovic, Danica V
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1392
AB  - Ultrafine CeO2-delta nanopowder, prepared by a simple and cost-effective self-propagating room temperature synthesis method (SPRT), showed high adsorption capability for removal of different azo dyes. Batch type of adsorption experiments with fixed initial pH value were conducted for the removal of Reactive Orange 16 (RO16), Methyl Orange (MO), and Mordant Blue 9 (MB9). The equilibrium adsorption data were evaluated using Freundlich and Langmuir isotherm models. The Langmuir model slightly better describes isotherm data for RO16 and MO, whereas the Freundlich model was found to best fit the isotherm data for MB9 over the whole concentration range. The maximum adsorption capacities, determined from isotherm data for MO, MB9, and RO16 were 113, 101, and 91 mg g(1) respectively. The adsorption process follows the pseudo-second-order kinetic model indicating the coexistence of chemisorption and physisorption. The mechanism of azo dye adsorption is also discussed.
PB  - American Chemical Society (ACS)
T2  - Langmuir
T1  - Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes
VL  - 30
IS  - 39
SP  - 11582
EP  - 11590
DO  - 10.1021/la502969w
ER  - 

@article{
author = "Tomić, Nataša M. and Dohcevic-Mitrovic, Zorana D and Paunović, Novica M and Mijin, Dušan and Radić, Nenad and Grbić, Boško and Askrabic, Sonja M and Babić, Biljana M. and Bajuk-Bogdanovic, Danica V",
year = "2014",
abstract = "Ultrafine CeO2-delta nanopowder, prepared by a simple and cost-effective self-propagating room temperature synthesis method (SPRT), showed high adsorption capability for removal of different azo dyes. Batch type of adsorption experiments with fixed initial pH value were conducted for the removal of Reactive Orange 16 (RO16), Methyl Orange (MO), and Mordant Blue 9 (MB9). The equilibrium adsorption data were evaluated using Freundlich and Langmuir isotherm models. The Langmuir model slightly better describes isotherm data for RO16 and MO, whereas the Freundlich model was found to best fit the isotherm data for MB9 over the whole concentration range. The maximum adsorption capacities, determined from isotherm data for MO, MB9, and RO16 were 113, 101, and 91 mg g(1) respectively. The adsorption process follows the pseudo-second-order kinetic model indicating the coexistence of chemisorption and physisorption. The mechanism of azo dye adsorption is also discussed.",
publisher = "American Chemical Society (ACS)",
journal = "Langmuir",
title = "Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes",
volume = "30",
number = "39",
pages = "11582-11590",
doi = "10.1021/la502969w"
}

Tomić, N. M., Dohcevic-Mitrovic, Z. D., Paunović, N. M., Mijin, D., Radić, N., Grbić, B., Askrabic, S. M., Babić, B. M.,& Bajuk-Bogdanovic, D. V.. (2014). Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes. in Langmuir
American Chemical Society (ACS)., 30(39), 11582-11590.
https://doi.org/10.1021/la502969w

Tomić NM, Dohcevic-Mitrovic ZD, Paunović NM, Mijin D, Radić N, Grbić B, Askrabic SM, Babić BM, Bajuk-Bogdanovic DV. Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes. in Langmuir. 2014;30(39):11582-11590.
doi:10.1021/la502969w .

Tomić, Nataša M., Dohcevic-Mitrovic, Zorana D, Paunović, Novica M, Mijin, Dušan, Radić, Nenad, Grbić, Boško, Askrabic, Sonja M, Babić, Biljana M., Bajuk-Bogdanovic, Danica V, "Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes" in Langmuir, 30, no. 39 (2014):11582-11590,
https://doi.org/10.1021/la502969w . .

TY  - JOUR
AU  - Tomić, Nataša M.
AU  - Dohcevic-Mitrovic, Zorana D
AU  - Paunović, Novica M
AU  - Mijin, Dušan
AU  - Radić, Nenad
AU  - Grbić, Boško
AU  - Askrabic, Sonja M
AU  - Babić, Biljana M.
AU  - Bajuk-Bogdanovic, Danica V
PY  - 2014
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3170
AB  - Ultrafine CeO2-delta nanopowder, prepared by a simple and cost-effective self-propagating room temperature synthesis method (SPRT), showed high adsorption capability for removal of different azo dyes. Batch type of adsorption experiments with fixed initial pH value were conducted for the removal of Reactive Orange 16 (RO16), Methyl Orange (MO), and Mordant Blue 9 (MB9). The equilibrium adsorption data were evaluated using Freundlich and Langmuir isotherm models. The Langmuir model slightly better describes isotherm data for RO16 and MO, whereas the Freundlich model was found to best fit the isotherm data for MB9 over the whole concentration range. The maximum adsorption capacities, determined from isotherm data for MO, MB9, and RO16 were 113, 101, and 91 mg g(1) respectively. The adsorption process follows the pseudo-second-order kinetic model indicating the coexistence of chemisorption and physisorption. The mechanism of azo dye adsorption is also discussed.
PB  - American Chemical Society (ACS)
T2  - Langmuir
T1  - Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes
VL  - 30
IS  - 39
SP  - 11582
EP  - 11590
DO  - 10.1021/la502969w
ER  - 

@article{
author = "Tomić, Nataša M. and Dohcevic-Mitrovic, Zorana D and Paunović, Novica M and Mijin, Dušan and Radić, Nenad and Grbić, Boško and Askrabic, Sonja M and Babić, Biljana M. and Bajuk-Bogdanovic, Danica V",
year = "2014",
abstract = "Ultrafine CeO2-delta nanopowder, prepared by a simple and cost-effective self-propagating room temperature synthesis method (SPRT), showed high adsorption capability for removal of different azo dyes. Batch type of adsorption experiments with fixed initial pH value were conducted for the removal of Reactive Orange 16 (RO16), Methyl Orange (MO), and Mordant Blue 9 (MB9). The equilibrium adsorption data were evaluated using Freundlich and Langmuir isotherm models. The Langmuir model slightly better describes isotherm data for RO16 and MO, whereas the Freundlich model was found to best fit the isotherm data for MB9 over the whole concentration range. The maximum adsorption capacities, determined from isotherm data for MO, MB9, and RO16 were 113, 101, and 91 mg g(1) respectively. The adsorption process follows the pseudo-second-order kinetic model indicating the coexistence of chemisorption and physisorption. The mechanism of azo dye adsorption is also discussed.",
publisher = "American Chemical Society (ACS)",
journal = "Langmuir",
title = "Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes",
volume = "30",
number = "39",
pages = "11582-11590",
doi = "10.1021/la502969w"
}

Tomić, N. M., Dohcevic-Mitrovic, Z. D., Paunović, N. M., Mijin, D., Radić, N., Grbić, B., Askrabic, S. M., Babić, B. M.,& Bajuk-Bogdanovic, D. V.. (2014). Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes. in Langmuir
American Chemical Society (ACS)., 30(39), 11582-11590.
https://doi.org/10.1021/la502969w

Tomić NM, Dohcevic-Mitrovic ZD, Paunović NM, Mijin D, Radić N, Grbić B, Askrabic SM, Babić BM, Bajuk-Bogdanovic DV. Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes. in Langmuir. 2014;30(39):11582-11590.
doi:10.1021/la502969w .

Tomić, Nataša M., Dohcevic-Mitrovic, Zorana D, Paunović, Novica M, Mijin, Dušan, Radić, Nenad, Grbić, Boško, Askrabic, Sonja M, Babić, Biljana M., Bajuk-Bogdanovic, Danica V, "Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes" in Langmuir, 30, no. 39 (2014):11582-11590,
https://doi.org/10.1021/la502969w . .

TY  - JOUR
AU  - Milićević, Sonja
AU  - Milošević, Vladan
AU  - Povrenović, Dragan
AU  - Stojanović, Jovica
AU  - Martinović, Sanja
AU  - Babić, Biljana
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6897
AB  - The increasing levels of industrial wastewater released to the environment present a serious
threat to human health, living resources, and ecological systems. Fe-modified zeolites were developed and tested for removal of Cu2+ and Zn2+ from contaminated water. The surfaces of the naturally occurring zeolite, clinoptilolite, were modified with Fe(III) oxyhydroxides using three different methods, denoted I, II, and III (FeCli1 , FeCli2, and FeNaCli1, respectively). The oxyhydroxides were prepared in Method I using 0.1 M FeCl3 · H2O in an acetate buffer (pH = 3.6); in Method II, using 10% FeCl3 · H2O solution in 0.1 M KOH (pH = 10); and Method III was the same as Method I except the clinoptilolite was pretreated with NaCl. Newly synthesized materials from these three methods were then tested for their ability to enhance the sorption capacity for Cu and Zn compared to the natural sample (Cli). Powder X-ray diffraction measurements and the chemical composition of these modified samples confirmed that
clinoptilolite maintained its structure while amorphous Fe3+ species were synthesized. The specific surface area (BET method) of both the natural and modified clinoptilolite increased by 2 and 7.5 times for Methods I and II, respectively. Scanning electron microscopy and energy dispersive X-ray spectroscopy revealed that CaO was formed during Method I (FeCli1). Throughout the adsorption process, the hydrolysis of CaO and the release of OH¯ caused the precipitation of Cu and Zn hydroxide, which made the determination of the sorption capacity of FeCli1 impossible. This phenomenon was avoided in Method III (FeNaCli1) because of the absence of exchangeable Ca2+. The adsorption experiments with method II resulted in
double-enchanced adsoprtion capacity. Laboratory batch experiments have shown that the sorption capacities increased in the following order: Cli < FeCli2 < FeNaCli1, for Cu: 0.121 mmol/g < 0.251 mmol/g < 0.403 mmol/g and for Zn: 0.128 mmol/g < 0.234 mmol/g < 0.381 mmol/g.
PB  - Springer
T2  - Clay and Clay Minerals
T1  - Removal of heavy metals from aqueous solutions using natural and Fe(III) oxyhydroxide clinoptilolite
VL  - 61
VL  - 517
IS  - 6
SP  - 508
DO  - 10.1346/CCMN.2013.0610603
ER  - 

@article{
author = "Milićević, Sonja and Milošević, Vladan and Povrenović, Dragan and Stojanović, Jovica and Martinović, Sanja and Babić, Biljana",
year = "2013",
abstract = "The increasing levels of industrial wastewater released to the environment present a serious
threat to human health, living resources, and ecological systems. Fe-modified zeolites were developed and tested for removal of Cu2+ and Zn2+ from contaminated water. The surfaces of the naturally occurring zeolite, clinoptilolite, were modified with Fe(III) oxyhydroxides using three different methods, denoted I, II, and III (FeCli1 , FeCli2, and FeNaCli1, respectively). The oxyhydroxides were prepared in Method I using 0.1 M FeCl3 · H2O in an acetate buffer (pH = 3.6); in Method II, using 10% FeCl3 · H2O solution in 0.1 M KOH (pH = 10); and Method III was the same as Method I except the clinoptilolite was pretreated with NaCl. Newly synthesized materials from these three methods were then tested for their ability to enhance the sorption capacity for Cu and Zn compared to the natural sample (Cli). Powder X-ray diffraction measurements and the chemical composition of these modified samples confirmed that
clinoptilolite maintained its structure while amorphous Fe3+ species were synthesized. The specific surface area (BET method) of both the natural and modified clinoptilolite increased by 2 and 7.5 times for Methods I and II, respectively. Scanning electron microscopy and energy dispersive X-ray spectroscopy revealed that CaO was formed during Method I (FeCli1). Throughout the adsorption process, the hydrolysis of CaO and the release of OH¯ caused the precipitation of Cu and Zn hydroxide, which made the determination of the sorption capacity of FeCli1 impossible. This phenomenon was avoided in Method III (FeNaCli1) because of the absence of exchangeable Ca2+. The adsorption experiments with method II resulted in
double-enchanced adsoprtion capacity. Laboratory batch experiments have shown that the sorption capacities increased in the following order: Cli < FeCli2 < FeNaCli1, for Cu: 0.121 mmol/g < 0.251 mmol/g < 0.403 mmol/g and for Zn: 0.128 mmol/g < 0.234 mmol/g < 0.381 mmol/g.",
publisher = "Springer",
journal = "Clay and Clay Minerals",
title = "Removal of heavy metals from aqueous solutions using natural and Fe(III) oxyhydroxide clinoptilolite",
volume = "61, 517",
number = "6",
pages = "508",
doi = "10.1346/CCMN.2013.0610603"
}

Milićević, S., Milošević, V., Povrenović, D., Stojanović, J., Martinović, S.,& Babić, B.. (2013). Removal of heavy metals from aqueous solutions using natural and Fe(III) oxyhydroxide clinoptilolite. in Clay and Clay Minerals
Springer., 61(6), 508.
https://doi.org/10.1346/CCMN.2013.0610603

Milićević S, Milošević V, Povrenović D, Stojanović J, Martinović S, Babić B. Removal of heavy metals from aqueous solutions using natural and Fe(III) oxyhydroxide clinoptilolite. in Clay and Clay Minerals. 2013;61(6):508.
doi:10.1346/CCMN.2013.0610603 .

Milićević, Sonja, Milošević, Vladan, Povrenović, Dragan, Stojanović, Jovica, Martinović, Sanja, Babić, Biljana, "Removal of heavy metals from aqueous solutions using natural and Fe(III) oxyhydroxide clinoptilolite" in Clay and Clay Minerals, 61, no. 6 (2013):508,
https://doi.org/10.1346/CCMN.2013.0610603 . .

TY  - JOUR
AU  - Obradović, Maja
AU  - Babić, Biljana M.
AU  - Krstajić, Nedeljko V.
AU  - Gojković, Snežana Lj.
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1166
AB  - Tungsten carbide was synthesized by calcination of carbon cryogel with embedded tungsten in a form of metatungstate. This material was used as a support for Pt nanoparticles. XRD pattern of W-C support indicated the presence of WC, W2C, and unreacted W, as well as graphitized carbon. According to previous TEM analysis of W-C support, it contains particles with core-shell structure, where the W particle was covered with the shell of a mixture of WC and W2C. The average Pt grain size calculated from XRD pattern was about 6 nm. A cyclic voltammogram of W-C support was recorded within the potential range relevant for its application as a catalyst support in fuel cells. The pair of anodic/cathodic peaks close to the negative potential limit could be ascribed to the intercalation of hydrogen within hydrous tungsten oxide, which is always present on the surface of WC in aqueous solutions. The cyclic voltammogram of Pt/W-C indicated that tungsten oxide species are present on tungsten carbide shell as well as on the surface of Pt nanoparticles. The Pt surface is only partially covered by hydrous tungsten oxide. Hydrogen intercalation in hydrous tungsten oxide is enhanced in the presence of Pt nanoparticles. Also, the presence of hydrated tungsten oxide leads to the decrease of OH chemisorbed on Pt surface. Stripping of underpotentially deposited copper was used for the assessment of Pt surface area and the specific surface area of Pt was estimated to be 41 m2 g-1. The electrochemical oxygen reduction reaction was examined on the synthesized Pt/W-C catalyst and compared with the results on the commercial Pt/C catalyst. It was found that the current densities at Pt/W-C were almost twice as high as those on Pt/C. The Tafel plots for both catalysts are characterized with two Tafel slopes: -0.060 V dec-1 at low current densities, and -0.120 V dec-1 at high current densities. From the rotational dependence of the reaction rate, it was found that oxygen reduction on both Pt/W-C and Pt/C follows the first order kinetics with respect to O2 and that four electrons are transferred per O2 molecule. The results show that the presence of tungsten carbide in support material, i.e. hydrous tungsten oxide on Pt surface, leads to promotion of oxygen reduction on the Pt/W-C catalyst. It was assumed that oxophilic hydrated tungsten oxide hinders OH adsorption on Pt surface, thus increasing Pt surface area available for O2 adsorption and its electrochemical reduction.
AB  - Sintetizovan je nosač katalizatora u kojem se na ugljeničnoj osnovi nalaze nanočestice metalnog volframa obavijene volfram-karbidom i na njega su nanete nanočestice Pt. Karakterizacija sintetizovanog uzorka cikličnom voltametrijom u kiseloj sredini ukazala je na oksidaciju volframovih vrsta iz nosača i formiranje hidratisanih oksidnih vrsta volframa na površini Pt. Elektrohemijska redukcija O2 u kiseloj sredini je ispitivana na sintetizovanom uzorku i rezultati su upoređeni sa komercijalnim katalizatorom u kojem su nanočestice Pt na nosaču od ugljenika razvijene površine. Pokazano je da redukcija O2, bez obzira na nosač katalizatora, sledi kinetiku prvog reda po O2 uz razmenu četiri elektrona, ali da su gustine struje veće u slučaju nosača sa volfram-karbidom. Povećana aktivnost sintetizovanog katalizatora je posledica prisustva oksofiličnih hidratisanih oksida volframa koji sprečavaju adsorpciju hidratisanog oksida na površini Pt i tako povećavaju površinu Pt dostupnu za adsorpciju i redukciju molekula kiseonika.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Effect of tungsten carbide in carbon Pt catalyst support on electrochemical oxygen reduction in acid solution
T1  - Uticaj prisustva volfram-karbida u ugljeničnom nosaču Pt nanočestica na elektrohemijsku redukciju kiseonika u kiselom rastvoru
VL  - 67
IS  - 2
SP  - 303
EP  - 311
DO  - 10.2298/HEMIND120307063O
ER  - 

@article{
author = "Obradović, Maja and Babić, Biljana M. and Krstajić, Nedeljko V. and Gojković, Snežana Lj.",
year = "2013",
abstract = "Tungsten carbide was synthesized by calcination of carbon cryogel with embedded tungsten in a form of metatungstate. This material was used as a support for Pt nanoparticles. XRD pattern of W-C support indicated the presence of WC, W2C, and unreacted W, as well as graphitized carbon. According to previous TEM analysis of W-C support, it contains particles with core-shell structure, where the W particle was covered with the shell of a mixture of WC and W2C. The average Pt grain size calculated from XRD pattern was about 6 nm. A cyclic voltammogram of W-C support was recorded within the potential range relevant for its application as a catalyst support in fuel cells. The pair of anodic/cathodic peaks close to the negative potential limit could be ascribed to the intercalation of hydrogen within hydrous tungsten oxide, which is always present on the surface of WC in aqueous solutions. The cyclic voltammogram of Pt/W-C indicated that tungsten oxide species are present on tungsten carbide shell as well as on the surface of Pt nanoparticles. The Pt surface is only partially covered by hydrous tungsten oxide. Hydrogen intercalation in hydrous tungsten oxide is enhanced in the presence of Pt nanoparticles. Also, the presence of hydrated tungsten oxide leads to the decrease of OH chemisorbed on Pt surface. Stripping of underpotentially deposited copper was used for the assessment of Pt surface area and the specific surface area of Pt was estimated to be 41 m2 g-1. The electrochemical oxygen reduction reaction was examined on the synthesized Pt/W-C catalyst and compared with the results on the commercial Pt/C catalyst. It was found that the current densities at Pt/W-C were almost twice as high as those on Pt/C. The Tafel plots for both catalysts are characterized with two Tafel slopes: -0.060 V dec-1 at low current densities, and -0.120 V dec-1 at high current densities. From the rotational dependence of the reaction rate, it was found that oxygen reduction on both Pt/W-C and Pt/C follows the first order kinetics with respect to O2 and that four electrons are transferred per O2 molecule. The results show that the presence of tungsten carbide in support material, i.e. hydrous tungsten oxide on Pt surface, leads to promotion of oxygen reduction on the Pt/W-C catalyst. It was assumed that oxophilic hydrated tungsten oxide hinders OH adsorption on Pt surface, thus increasing Pt surface area available for O2 adsorption and its electrochemical reduction., Sintetizovan je nosač katalizatora u kojem se na ugljeničnoj osnovi nalaze nanočestice metalnog volframa obavijene volfram-karbidom i na njega su nanete nanočestice Pt. Karakterizacija sintetizovanog uzorka cikličnom voltametrijom u kiseloj sredini ukazala je na oksidaciju volframovih vrsta iz nosača i formiranje hidratisanih oksidnih vrsta volframa na površini Pt. Elektrohemijska redukcija O2 u kiseloj sredini je ispitivana na sintetizovanom uzorku i rezultati su upoređeni sa komercijalnim katalizatorom u kojem su nanočestice Pt na nosaču od ugljenika razvijene površine. Pokazano je da redukcija O2, bez obzira na nosač katalizatora, sledi kinetiku prvog reda po O2 uz razmenu četiri elektrona, ali da su gustine struje veće u slučaju nosača sa volfram-karbidom. Povećana aktivnost sintetizovanog katalizatora je posledica prisustva oksofiličnih hidratisanih oksida volframa koji sprečavaju adsorpciju hidratisanog oksida na površini Pt i tako povećavaju površinu Pt dostupnu za adsorpciju i redukciju molekula kiseonika.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Effect of tungsten carbide in carbon Pt catalyst support on electrochemical oxygen reduction in acid solution, Uticaj prisustva volfram-karbida u ugljeničnom nosaču Pt nanočestica na elektrohemijsku redukciju kiseonika u kiselom rastvoru",
volume = "67",
number = "2",
pages = "303-311",
doi = "10.2298/HEMIND120307063O"
}

Obradović, M., Babić, B. M., Krstajić, N. V.,& Gojković, S. Lj.. (2013). Effect of tungsten carbide in carbon Pt catalyst support on electrochemical oxygen reduction in acid solution. in Hemijska industrija
Association of Chemical Engineers of Serbia., 67(2), 303-311.
https://doi.org/10.2298/HEMIND120307063O

Obradović M, Babić BM, Krstajić NV, Gojković SL. Effect of tungsten carbide in carbon Pt catalyst support on electrochemical oxygen reduction in acid solution. in Hemijska industrija. 2013;67(2):303-311.
doi:10.2298/HEMIND120307063O .

Obradović, Maja, Babić, Biljana M., Krstajić, Nedeljko V., Gojković, Snežana Lj., "Effect of tungsten carbide in carbon Pt catalyst support on electrochemical oxygen reduction in acid solution" in Hemijska industrija, 67, no. 2 (2013):303-311,
https://doi.org/10.2298/HEMIND120307063O . .

TY  - JOUR
AU  - Krstajić, Mila N.
AU  - Obradović, Maja
AU  - Babić, Biljana M.
AU  - Radmilović, Velimir R.
AU  - Lačnjevac, Uroš
AU  - Krstajić, Nedeljko V.
AU  - Gojković, Snežana Lj.
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1232
AB  - Ru-doped SnO2 powder, (RuxSn1-x)O2, with a Sn:Ru atomic ratio of 9:1 was synthesized and used as a support for Pt nanoparticles (30 mass % loading). The (RuxSn1-x)O2 support and the Pt/(RuxSn1-x)O2 catalyst were characterized by X-ray diffraction measurements, energy dispersive X-ray spectroscopy and transmission electron microscopy (TEM). The (RuxSn1-x)O2 was found to be a two-phase material consisting of probably a solid solution of RuO2 in SnO2 and pure RuO2. The average Pt particle size determined by TEM was 5.3 nm. Cyclic voltammetry of Pt/(RuxSn1-x)O2 indicated good conductivity of the support and displayed the usual features of Pt. The results of the electrochemical oxidation of COads and methanol on Pt/(RuxSn1-x)O2 were compared with those on commercial Pt/C and PtRu/C catalysts. Oxidation of COads on Pt/(RuxSn1-x)O2 starts at lower positive potentials than on PtRu/C and Pt/C. Potentiodynamic polarization curves and chronoamperometric curves of methanol oxidation indicated higher initial activity of the Pt/(RuxSn1-x)O2 catalyst compared to PtRu/C, but also a greater loss in current density over time. A potentiodynamic stability test of the catalysts revealed that deactivation of Pt/(RuxSn1-x)O2 and Pt/C was primarily caused by poisoning of the Pt surface by residues of methanol oxidation, which mostly occurred during the first potential cycle. In the case of PtRu/C, the poisoning of the surface was minor and deactivation was caused by surface area loss of the PtRu.
AB  - Sintetizovan je prah SnO2 dopovan rutenijumom, (RuxSn1-x)O2, sa atomskim odnosom Sn:Ru od 9:1, i korišćen kao nosač nanočestica platine. Udeo Pt u dobijenom katalizatoru, Pt/(RuxSn1-x)O2, bio je 30 mas. %. Nosač i katalizator su karakterisani difrakcijom X-zraka, energetski disperzivnom spektroskopijom X-zraka i transmisionom elektronskom mikroskopijom (TEM). Pokazano je da je (RuxSn1-x)O2 dvofazni materijal koji verovatno sadrži čvrst rastvor RuO2 u SnO2 i čist RuO2. Prosečna veličina zrna Pt, određena TEM analizom, iznosi 5,3 nm. Ciklična voltametrija Pt/(RuxSn1-x)O2 ukazala je na dobru provodnost nosača katalizatora i na uobičajene karakteristike Pt. Upoređeni su rezultati elektrohemijske oksidacije COads na Pt/(RuxSn1-x)O2, Pt/C i PtRu/C. Oksidacija COads na Pt/(RuxSn1-x)O2 počinje na negativnijim potencijalima u odnosu na PtRu/C i Pt/C. Potenciodinamičke polarizacione krive i hronoamperometrijske krive za oksidaciju metanola ukazuju na veću početnu aktivnost katalizatora Pt/(RuxSn1-x)O2 u odnosu na PtRu/C, ali i na veće smanjenje gustine struje tokom vremena. Test potenciodinamičke stabilnosti katalizatora je ukazao da je smanjenje aktivnosti Pt/(RuxSn1-x)O2 i Pt/C prvenstveno prouzrokovano trovanjem površine Pt proizvodima nepotpune oksidacije metanola, koje se uglavnom odigrava tokom prvog ciklusa. Kod PtRu/C trovanje površine je minimalno, a smanjenje aktivnosti je prouzrokovano smanjenjem elektrohemijski aktivne površine PtRu.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Electrochemical oxidation of methanol on Pt/(RuxSn1-x)O2 nanocatalyst
T1  - Elektrohemijska oksidacija metanola na katalizatoru Pt/(RuxSn1-x)O2
VL  - 78
IS  - 11
SP  - 1703
EP  - 1716
DO  - 10.2298/JSC130718091K
ER  - 

@article{
author = "Krstajić, Mila N. and Obradović, Maja and Babić, Biljana M. and Radmilović, Velimir R. and Lačnjevac, Uroš and Krstajić, Nedeljko V. and Gojković, Snežana Lj.",
year = "2013",
abstract = "Ru-doped SnO2 powder, (RuxSn1-x)O2, with a Sn:Ru atomic ratio of 9:1 was synthesized and used as a support for Pt nanoparticles (30 mass % loading). The (RuxSn1-x)O2 support and the Pt/(RuxSn1-x)O2 catalyst were characterized by X-ray diffraction measurements, energy dispersive X-ray spectroscopy and transmission electron microscopy (TEM). The (RuxSn1-x)O2 was found to be a two-phase material consisting of probably a solid solution of RuO2 in SnO2 and pure RuO2. The average Pt particle size determined by TEM was 5.3 nm. Cyclic voltammetry of Pt/(RuxSn1-x)O2 indicated good conductivity of the support and displayed the usual features of Pt. The results of the electrochemical oxidation of COads and methanol on Pt/(RuxSn1-x)O2 were compared with those on commercial Pt/C and PtRu/C catalysts. Oxidation of COads on Pt/(RuxSn1-x)O2 starts at lower positive potentials than on PtRu/C and Pt/C. Potentiodynamic polarization curves and chronoamperometric curves of methanol oxidation indicated higher initial activity of the Pt/(RuxSn1-x)O2 catalyst compared to PtRu/C, but also a greater loss in current density over time. A potentiodynamic stability test of the catalysts revealed that deactivation of Pt/(RuxSn1-x)O2 and Pt/C was primarily caused by poisoning of the Pt surface by residues of methanol oxidation, which mostly occurred during the first potential cycle. In the case of PtRu/C, the poisoning of the surface was minor and deactivation was caused by surface area loss of the PtRu., Sintetizovan je prah SnO2 dopovan rutenijumom, (RuxSn1-x)O2, sa atomskim odnosom Sn:Ru od 9:1, i korišćen kao nosač nanočestica platine. Udeo Pt u dobijenom katalizatoru, Pt/(RuxSn1-x)O2, bio je 30 mas. %. Nosač i katalizator su karakterisani difrakcijom X-zraka, energetski disperzivnom spektroskopijom X-zraka i transmisionom elektronskom mikroskopijom (TEM). Pokazano je da je (RuxSn1-x)O2 dvofazni materijal koji verovatno sadrži čvrst rastvor RuO2 u SnO2 i čist RuO2. Prosečna veličina zrna Pt, određena TEM analizom, iznosi 5,3 nm. Ciklična voltametrija Pt/(RuxSn1-x)O2 ukazala je na dobru provodnost nosača katalizatora i na uobičajene karakteristike Pt. Upoređeni su rezultati elektrohemijske oksidacije COads na Pt/(RuxSn1-x)O2, Pt/C i PtRu/C. Oksidacija COads na Pt/(RuxSn1-x)O2 počinje na negativnijim potencijalima u odnosu na PtRu/C i Pt/C. Potenciodinamičke polarizacione krive i hronoamperometrijske krive za oksidaciju metanola ukazuju na veću početnu aktivnost katalizatora Pt/(RuxSn1-x)O2 u odnosu na PtRu/C, ali i na veće smanjenje gustine struje tokom vremena. Test potenciodinamičke stabilnosti katalizatora je ukazao da je smanjenje aktivnosti Pt/(RuxSn1-x)O2 i Pt/C prvenstveno prouzrokovano trovanjem površine Pt proizvodima nepotpune oksidacije metanola, koje se uglavnom odigrava tokom prvog ciklusa. Kod PtRu/C trovanje površine je minimalno, a smanjenje aktivnosti je prouzrokovano smanjenjem elektrohemijski aktivne površine PtRu.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Electrochemical oxidation of methanol on Pt/(RuxSn1-x)O2 nanocatalyst, Elektrohemijska oksidacija metanola na katalizatoru Pt/(RuxSn1-x)O2",
volume = "78",
number = "11",
pages = "1703-1716",
doi = "10.2298/JSC130718091K"
}

Krstajić, M. N., Obradović, M., Babić, B. M., Radmilović, V. R., Lačnjevac, U., Krstajić, N. V.,& Gojković, S. Lj.. (2013). Electrochemical oxidation of methanol on Pt/(RuxSn1-x)O2 nanocatalyst. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 78(11), 1703-1716.
https://doi.org/10.2298/JSC130718091K

Krstajić MN, Obradović M, Babić BM, Radmilović VR, Lačnjevac U, Krstajić NV, Gojković SL. Electrochemical oxidation of methanol on Pt/(RuxSn1-x)O2 nanocatalyst. in Journal of the Serbian Chemical Society. 2013;78(11):1703-1716.
doi:10.2298/JSC130718091K .

Krstajić, Mila N., Obradović, Maja, Babić, Biljana M., Radmilović, Velimir R., Lačnjevac, Uroš, Krstajić, Nedeljko V., Gojković, Snežana Lj., "Electrochemical oxidation of methanol on Pt/(RuxSn1-x)O2 nanocatalyst" in Journal of the Serbian Chemical Society, 78, no. 11 (2013):1703-1716,
https://doi.org/10.2298/JSC130718091K . .

TY  - JOUR
AU  - Obradović, Maja
AU  - Babić, Biljana M.
AU  - Radmilović, Velimir R.
AU  - Krstajić, Nedeljko V.
AU  - Gojković, Snežana Lj.
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/977
AB  - Tungsten carbide was synthesized by calcination of carbon cryogel containing tungsten in a form of metatungstate. Characterization by X-ray diffraction and transmission electron microscopy indicated core-shell structure of the particles with tungsten core and tungsten carbide shell, attached to graphitized carbon. Pt nanoparticles were deposited on this material and most of them were nucleated on tungsten carbide. Cyclic voltammetry of W-C support and Pt/W-C catalyst indicated hydrogen intercalation in surface hydrous tungsten oxide. Oxidation of COads on Pt/W-C commences earlier than on Pt/C for about 100 mV. The onset potentials of MOR on Pt/W-C and Pt/C are the same, but at more positive potentials Pt/W-C catalyst is more active. It was proposed that promotion of MOR is based on bifunctional mechanism that facilitates COads removal. Stability test was performed by potential cycling of Pt/W-C and Pt/C in the supporting electrolyte and in the presence of methanol. Pt surface area loss observed in the supporting electrolyte of both catalysts after 250 cycles was about 20%. Decrease in the activity for methanol oxidation was 30% for Pt/W-C, but even 48% for Pt/C. The difference was explained by the presence of hydrous tungsten oxide on Pt in Pt/W-C catalyst, which reduces accumulation of poisoning COads. Copyright
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - International Journal of Hydrogen Energy
T1  - Core-shell structured tungsten-tungsten carbide as a Pt catalyst support and its activity for methanol electrooxidation
VL  - 37
IS  - 14
SP  - 10671
EP  - 10679
DO  - 10.1016/j.ijhydene.2012.04.114
ER  - 

@article{
author = "Obradović, Maja and Babić, Biljana M. and Radmilović, Velimir R. and Krstajić, Nedeljko V. and Gojković, Snežana Lj.",
year = "2012",
abstract = "Tungsten carbide was synthesized by calcination of carbon cryogel containing tungsten in a form of metatungstate. Characterization by X-ray diffraction and transmission electron microscopy indicated core-shell structure of the particles with tungsten core and tungsten carbide shell, attached to graphitized carbon. Pt nanoparticles were deposited on this material and most of them were nucleated on tungsten carbide. Cyclic voltammetry of W-C support and Pt/W-C catalyst indicated hydrogen intercalation in surface hydrous tungsten oxide. Oxidation of COads on Pt/W-C commences earlier than on Pt/C for about 100 mV. The onset potentials of MOR on Pt/W-C and Pt/C are the same, but at more positive potentials Pt/W-C catalyst is more active. It was proposed that promotion of MOR is based on bifunctional mechanism that facilitates COads removal. Stability test was performed by potential cycling of Pt/W-C and Pt/C in the supporting electrolyte and in the presence of methanol. Pt surface area loss observed in the supporting electrolyte of both catalysts after 250 cycles was about 20%. Decrease in the activity for methanol oxidation was 30% for Pt/W-C, but even 48% for Pt/C. The difference was explained by the presence of hydrous tungsten oxide on Pt in Pt/W-C catalyst, which reduces accumulation of poisoning COads. Copyright",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "International Journal of Hydrogen Energy",
title = "Core-shell structured tungsten-tungsten carbide as a Pt catalyst support and its activity for methanol electrooxidation",
volume = "37",
number = "14",
pages = "10671-10679",
doi = "10.1016/j.ijhydene.2012.04.114"
}

Obradović, M., Babić, B. M., Radmilović, V. R., Krstajić, N. V.,& Gojković, S. Lj.. (2012). Core-shell structured tungsten-tungsten carbide as a Pt catalyst support and its activity for methanol electrooxidation. in International Journal of Hydrogen Energy
Oxford : Pergamon-Elsevier Science Ltd., 37(14), 10671-10679.
https://doi.org/10.1016/j.ijhydene.2012.04.114

Obradović M, Babić BM, Radmilović VR, Krstajić NV, Gojković SL. Core-shell structured tungsten-tungsten carbide as a Pt catalyst support and its activity for methanol electrooxidation. in International Journal of Hydrogen Energy. 2012;37(14):10671-10679.
doi:10.1016/j.ijhydene.2012.04.114 .

Obradović, Maja, Babić, Biljana M., Radmilović, Velimir R., Krstajić, Nedeljko V., Gojković, Snežana Lj., "Core-shell structured tungsten-tungsten carbide as a Pt catalyst support and its activity for methanol electrooxidation" in International Journal of Hydrogen Energy, 37, no. 14 (2012):10671-10679,
https://doi.org/10.1016/j.ijhydene.2012.04.114 . .

TY  - JOUR
AU  - Obradović, Maja
AU  - Rogan, Jelena R.
AU  - Babić, Biljana M.
AU  - Tripković, Amalija
AU  - Gautam, A. R. S.
AU  - Radmilović, Velimir R.
AU  - Gojković, Snežana Lj.
PY  - 2012
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1086
AB  - Pt-Au nanoparticles supported on high area carbon were prepared by simultaneous reduction of Au and Pt precursors and by reduction of Pt precursor on already prepared Au nanoparticles. The first method produced a solid solution of Pt in Au containing similar to 5% Pt with the remaining Pt on the nanoparticles' surface. For the Pt:Au precursor ratio of 1:4 and 1:9, the surface ratio was found to be 0.70:0.30 and 0.55:0.45, respectively. By the second method with the Pt:Au precursors ratio of 1:12, the surface ratio was 0.30:0.70. The voltammetric peaks of Pt-oxide reduction and CO(ads) oxidation demonstrated electronic modification of Pt by Au in all catalysts. With decreasing Pt:Au surface ratio the activity for HCOOH oxidation increases and surface coverage by CO(ads) decreases. The highest activity under potentiodynamic and quasi steady-state conditions without poisoning by CO(ads) was observed for the catalyst with the lowest Pt:Au surface ratio. Chronoamperometic test showed that its high catalytic activity is associated with a high deactivation rate. It was postulated that too strong adsorption of a reactive or non-reactive intermediate caused by electron modification of Pt by underlying Au, is responsible for the deactivation. This result stresses that high Pt dispersion, necessary for promotion of the dehydrogenation path in HCOOH oxidation, can produce too strong adsorption of intermediates causing deactivation of the catalyst.
PB  - Elsevier
T2  - Journal of Power Sources
T1  - Formic acid oxidation on Pt-Au nanoparticles: Relation between the catalyst activity and the poisoning rate
VL  - 197
SP  - 72
EP  - 79
DO  - 10.1016/j.jpowsour.2011.09.043
ER  - 

@article{
author = "Obradović, Maja and Rogan, Jelena R. and Babić, Biljana M. and Tripković, Amalija and Gautam, A. R. S. and Radmilović, Velimir R. and Gojković, Snežana Lj.",
year = "2012",
abstract = "Pt-Au nanoparticles supported on high area carbon were prepared by simultaneous reduction of Au and Pt precursors and by reduction of Pt precursor on already prepared Au nanoparticles. The first method produced a solid solution of Pt in Au containing similar to 5% Pt with the remaining Pt on the nanoparticles' surface. For the Pt:Au precursor ratio of 1:4 and 1:9, the surface ratio was found to be 0.70:0.30 and 0.55:0.45, respectively. By the second method with the Pt:Au precursors ratio of 1:12, the surface ratio was 0.30:0.70. The voltammetric peaks of Pt-oxide reduction and CO(ads) oxidation demonstrated electronic modification of Pt by Au in all catalysts. With decreasing Pt:Au surface ratio the activity for HCOOH oxidation increases and surface coverage by CO(ads) decreases. The highest activity under potentiodynamic and quasi steady-state conditions without poisoning by CO(ads) was observed for the catalyst with the lowest Pt:Au surface ratio. Chronoamperometic test showed that its high catalytic activity is associated with a high deactivation rate. It was postulated that too strong adsorption of a reactive or non-reactive intermediate caused by electron modification of Pt by underlying Au, is responsible for the deactivation. This result stresses that high Pt dispersion, necessary for promotion of the dehydrogenation path in HCOOH oxidation, can produce too strong adsorption of intermediates causing deactivation of the catalyst.",
publisher = "Elsevier",
journal = "Journal of Power Sources",
title = "Formic acid oxidation on Pt-Au nanoparticles: Relation between the catalyst activity and the poisoning rate",
volume = "197",
pages = "72-79",
doi = "10.1016/j.jpowsour.2011.09.043"
}

Obradović, M., Rogan, J. R., Babić, B. M., Tripković, A., Gautam, A. R. S., Radmilović, V. R.,& Gojković, S. Lj.. (2012). Formic acid oxidation on Pt-Au nanoparticles: Relation between the catalyst activity and the poisoning rate. in Journal of Power Sources
Elsevier., 197, 72-79.
https://doi.org/10.1016/j.jpowsour.2011.09.043

Obradović M, Rogan JR, Babić BM, Tripković A, Gautam ARS, Radmilović VR, Gojković SL. Formic acid oxidation on Pt-Au nanoparticles: Relation between the catalyst activity and the poisoning rate. in Journal of Power Sources. 2012;197:72-79.
doi:10.1016/j.jpowsour.2011.09.043 .

Obradović, Maja, Rogan, Jelena R., Babić, Biljana M., Tripković, Amalija, Gautam, A. R. S., Radmilović, Velimir R., Gojković, Snežana Lj., "Formic acid oxidation on Pt-Au nanoparticles: Relation between the catalyst activity and the poisoning rate" in Journal of Power Sources, 197 (2012):72-79,
https://doi.org/10.1016/j.jpowsour.2011.09.043 . .

TY  - JOUR
AU  - Pavlović, Vera P.
AU  - Popović, D.
AU  - Krstić, Jugoslav
AU  - Dojčilović, Jablan R.
AU  - Babić, Biljana M.
AU  - Pavlović, Vladimir B.
PY  - 2009
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/588
AB  - The influence of mechanical activation in a planetary ball mill on the change of the structure of BaTiO3 powders has been investigated. The particle size distribution of the nonactivated and activated samples was measured by a particle dimension laser analyzer. The mercury porosimetry method has been applied for determination of the surface area of the samples, bulk density, specific pore volumes, total porosity and the pore size distributions. Formation of paramagnetic centers and the change of the IR active modes was investigated by EPR and IR measurements. Semi-quantitative comparison of the BaCO3 and OH- group presence in IR spectra was calculated. The investigation showed that mechanical activation of BaTiO3 has a pronounced influence on the change of the powder particles structure and enables establishing the directions of possible BaTiO3 ceramics materials properties prognosis according to the synthesis-structure correlation.
PB  - Elsevier
T2  - Journal of Alloys and Compounds
T1  - Influence of mechanical activation on the structure of ultrafine BaTiO3 powders
VL  - 486
IS  - 1-2
SP  - 633
EP  - 639
DO  - 10.1016/j.jallcom.2009.07.008
ER  - 

@article{
author = "Pavlović, Vera P. and Popović, D. and Krstić, Jugoslav and Dojčilović, Jablan R. and Babić, Biljana M. and Pavlović, Vladimir B.",
year = "2009",
abstract = "The influence of mechanical activation in a planetary ball mill on the change of the structure of BaTiO3 powders has been investigated. The particle size distribution of the nonactivated and activated samples was measured by a particle dimension laser analyzer. The mercury porosimetry method has been applied for determination of the surface area of the samples, bulk density, specific pore volumes, total porosity and the pore size distributions. Formation of paramagnetic centers and the change of the IR active modes was investigated by EPR and IR measurements. Semi-quantitative comparison of the BaCO3 and OH- group presence in IR spectra was calculated. The investigation showed that mechanical activation of BaTiO3 has a pronounced influence on the change of the powder particles structure and enables establishing the directions of possible BaTiO3 ceramics materials properties prognosis according to the synthesis-structure correlation.",
publisher = "Elsevier",
journal = "Journal of Alloys and Compounds",
title = "Influence of mechanical activation on the structure of ultrafine BaTiO3 powders",
volume = "486",
number = "1-2",
pages = "633-639",
doi = "10.1016/j.jallcom.2009.07.008"
}

Pavlović, V. P., Popović, D., Krstić, J., Dojčilović, J. R., Babić, B. M.,& Pavlović, V. B.. (2009). Influence of mechanical activation on the structure of ultrafine BaTiO3 powders. in Journal of Alloys and Compounds
Elsevier., 486(1-2), 633-639.
https://doi.org/10.1016/j.jallcom.2009.07.008

Pavlović VP, Popović D, Krstić J, Dojčilović JR, Babić BM, Pavlović VB. Influence of mechanical activation on the structure of ultrafine BaTiO3 powders. in Journal of Alloys and Compounds. 2009;486(1-2):633-639.
doi:10.1016/j.jallcom.2009.07.008 .

Pavlović, Vera P., Popović, D., Krstić, Jugoslav, Dojčilović, Jablan R., Babić, Biljana M., Pavlović, Vladimir B., "Influence of mechanical activation on the structure of ultrafine BaTiO3 powders" in Journal of Alloys and Compounds, 486, no. 1-2 (2009):633-639,
https://doi.org/10.1016/j.jallcom.2009.07.008 . .

TY  - JOUR
AU  - Obradović, Maja
AU  - Babić, Biljana M.
AU  - Kowal, Andrzej
AU  - Panić, Vladimir
AU  - Gojković, Snežana Lj.
PY  - 2008
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/376
AB  - The electrochemical characteristics of a mixture of Pt-black and WC powders and its catalytic activity for methanol and formic acid oxidation were investigated in acid solution. XRD and AFM measurements revealed that the WC powder employed for the investigation was a single-phase material consisting of crystallites/spherical particles of average size of about 50 nm, which were agglomerated into much larger particles. Cyclic voltammetry showed that the WC underwent electrochemical oxidation, producing tungstate species. In the case of the mixed Pt + WC powders, the tungstate species were deposited on the Pt as a thin film of hydrous tungsten oxide. Enhanced hydrogen intercalation in the hydrous tungsten oxide was observed and it was proposed to be promoted in mixed powders by the presence of hydrogen adatoms on bare Pt sites. The determination of Pt surface area in the Pt + WC layer by stripping of underpotentially deposited Cu revealed that the entire Pt surface was accessible for underpotential deposition of Cu. Investigation of the electrochemical oxidation of methanol and formic acid on Pt + WC and pure Pt layers did not indicate electrocatalytic promotion due to the presence of WC.
AB  - U radu su ispitivane elektrohemijske karakteristike smeše prahova Pt i WC i njena katalitička aktivnost za reakcije oksidacije metanola i mravlje kiseline u kiselom rastvoru. Analiza rezultata difrakcije X-zraka (XRD) i mikroskopije atomskih sila (AFM) pokazuju da je prah WC jednofazni materijal sa prosečnom veličinom kristalita od oko 50 nm, koji su aglomerisani u mnogo veće čestice. Ciklična voltametrija ukazuje na to da WC podleže oksidaciji kojom nastaju volframatne vrste. U slučaju smeše prahova Pt i WC, volframatne vrste najverovatnije se talože na Pt u obliku tankog sloja hidratisanih oksida volframa. Primećeno je povećanje interkalacije vodonika u sloju hidratisanih volframata i pretpostavlja se da prisustvo adatoma vodonika na površini Pt potpomaže proces vodonične interkalacije. Određivanje površine Pt u sloju Pt + WC desorpcijom monosloja Cu taloženog na potpotencijalima ukazuje da je čitava površina Pt dostupna za taloženje atoma Cu. Ispitivanje elektrohemijskih reakcija oksidacije metanola i mravlje kiseline na sloju smeše Pt + WC i sloju čiste Pt ukazuje da prisustvo praha WC ne utiče na elektrokatalitička svojstva Pt.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Electrochemical properties of mixed WC and Pt-black powders
T1  - Elektrohemijska svojstva smeše prahova WC i Pt
VL  - 73
IS  - 12
SP  - 1197
EP  - 1209
DO  - 10.2298/JSC0812197O
ER  - 

@article{
author = "Obradović, Maja and Babić, Biljana M. and Kowal, Andrzej and Panić, Vladimir and Gojković, Snežana Lj.",
year = "2008",
abstract = "The electrochemical characteristics of a mixture of Pt-black and WC powders and its catalytic activity for methanol and formic acid oxidation were investigated in acid solution. XRD and AFM measurements revealed that the WC powder employed for the investigation was a single-phase material consisting of crystallites/spherical particles of average size of about 50 nm, which were agglomerated into much larger particles. Cyclic voltammetry showed that the WC underwent electrochemical oxidation, producing tungstate species. In the case of the mixed Pt + WC powders, the tungstate species were deposited on the Pt as a thin film of hydrous tungsten oxide. Enhanced hydrogen intercalation in the hydrous tungsten oxide was observed and it was proposed to be promoted in mixed powders by the presence of hydrogen adatoms on bare Pt sites. The determination of Pt surface area in the Pt + WC layer by stripping of underpotentially deposited Cu revealed that the entire Pt surface was accessible for underpotential deposition of Cu. Investigation of the electrochemical oxidation of methanol and formic acid on Pt + WC and pure Pt layers did not indicate electrocatalytic promotion due to the presence of WC., U radu su ispitivane elektrohemijske karakteristike smeše prahova Pt i WC i njena katalitička aktivnost za reakcije oksidacije metanola i mravlje kiseline u kiselom rastvoru. Analiza rezultata difrakcije X-zraka (XRD) i mikroskopije atomskih sila (AFM) pokazuju da je prah WC jednofazni materijal sa prosečnom veličinom kristalita od oko 50 nm, koji su aglomerisani u mnogo veće čestice. Ciklična voltametrija ukazuje na to da WC podleže oksidaciji kojom nastaju volframatne vrste. U slučaju smeše prahova Pt i WC, volframatne vrste najverovatnije se talože na Pt u obliku tankog sloja hidratisanih oksida volframa. Primećeno je povećanje interkalacije vodonika u sloju hidratisanih volframata i pretpostavlja se da prisustvo adatoma vodonika na površini Pt potpomaže proces vodonične interkalacije. Određivanje površine Pt u sloju Pt + WC desorpcijom monosloja Cu taloženog na potpotencijalima ukazuje da je čitava površina Pt dostupna za taloženje atoma Cu. Ispitivanje elektrohemijskih reakcija oksidacije metanola i mravlje kiseline na sloju smeše Pt + WC i sloju čiste Pt ukazuje da prisustvo praha WC ne utiče na elektrokatalitička svojstva Pt.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Electrochemical properties of mixed WC and Pt-black powders, Elektrohemijska svojstva smeše prahova WC i Pt",
volume = "73",
number = "12",
pages = "1197-1209",
doi = "10.2298/JSC0812197O"
}

Obradović, M., Babić, B. M., Kowal, A., Panić, V.,& Gojković, S. Lj.. (2008). Electrochemical properties of mixed WC and Pt-black powders. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 73(12), 1197-1209.
https://doi.org/10.2298/JSC0812197O

Obradović M, Babić BM, Kowal A, Panić V, Gojković SL. Electrochemical properties of mixed WC and Pt-black powders. in Journal of the Serbian Chemical Society. 2008;73(12):1197-1209.
doi:10.2298/JSC0812197O .

Obradović, Maja, Babić, Biljana M., Kowal, Andrzej, Panić, Vladimir, Gojković, Snežana Lj., "Electrochemical properties of mixed WC and Pt-black powders" in Journal of the Serbian Chemical Society, 73, no. 12 (2008):1197-1209,
https://doi.org/10.2298/JSC0812197O . .

TY  - JOUR
AU  - Kaluđerović, Branka
AU  - Jovanović, Vladislava M.
AU  - Babić, Biljana M.
AU  - Terzić, Sanja
AU  - Bogdanov, Žarko D.
PY  - 2008
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/456
AB  - Platinum supported on high surface area carbon material is one of the most intensively studied catalysts. However, physicochemical characteristics and surface chemistry of carbon influence properties of the support itself as well as of a catalyst. In our studies we deposited platinum on hollow fibers with or without carbon cryogel. Carbon materials were characterized by nitrogen adsorption/desorption isotherms measurements, X-ray fluorescence spectrometry and scanning electron microscope. Deposition of platinum was performed chemically and electrochemically. The electrochemical deposition was performed on the grinded samples at the same conditions for all substrates with the aim to study the activity of the catalyst. It was noticed that the nature of carbon support affected structure of platinum deposits and thus their activity.
T2  - Journal of Optoelectronics and Advanced Materials
T1  - Characterization of platinum deposited on carbon hollow fibers / carbon cryogel composites
VL  - 10
IS  - 10
SP  - 2708
EP  - 2712
UR  - https://hdl.handle.net/21.15107/rcub_cer_456
ER  - 

@article{
author = "Kaluđerović, Branka and Jovanović, Vladislava M. and Babić, Biljana M. and Terzić, Sanja and Bogdanov, Žarko D.",
year = "2008",
abstract = "Platinum supported on high surface area carbon material is one of the most intensively studied catalysts. However, physicochemical characteristics and surface chemistry of carbon influence properties of the support itself as well as of a catalyst. In our studies we deposited platinum on hollow fibers with or without carbon cryogel. Carbon materials were characterized by nitrogen adsorption/desorption isotherms measurements, X-ray fluorescence spectrometry and scanning electron microscope. Deposition of platinum was performed chemically and electrochemically. The electrochemical deposition was performed on the grinded samples at the same conditions for all substrates with the aim to study the activity of the catalyst. It was noticed that the nature of carbon support affected structure of platinum deposits and thus their activity.",
journal = "Journal of Optoelectronics and Advanced Materials",
title = "Characterization of platinum deposited on carbon hollow fibers / carbon cryogel composites",
volume = "10",
number = "10",
pages = "2708-2712",
url = "https://hdl.handle.net/21.15107/rcub_cer_456"
}

Kaluđerović, B., Jovanović, V. M., Babić, B. M., Terzić, S.,& Bogdanov, Ž. D.. (2008). Characterization of platinum deposited on carbon hollow fibers / carbon cryogel composites. in Journal of Optoelectronics and Advanced Materials, 10(10), 2708-2712.
https://hdl.handle.net/21.15107/rcub_cer_456

Kaluđerović B, Jovanović VM, Babić BM, Terzić S, Bogdanov ŽD. Characterization of platinum deposited on carbon hollow fibers / carbon cryogel composites. in Journal of Optoelectronics and Advanced Materials. 2008;10(10):2708-2712.
https://hdl.handle.net/21.15107/rcub_cer_456 .

Kaluđerović, Branka, Jovanović, Vladislava M., Babić, Biljana M., Terzić, Sanja, Bogdanov, Žarko D., "Characterization of platinum deposited on carbon hollow fibers / carbon cryogel composites" in Journal of Optoelectronics and Advanced Materials, 10, no. 10 (2008):2708-2712,
https://hdl.handle.net/21.15107/rcub_cer_456 .

TY  - JOUR
AU  - Polovina, Mirjana J.
AU  - Babić, Biljana M.
AU  - Kaluđerović, Branka
AU  - Dekanski, Aleksandar
PY  - 1997
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4197
AB  - Cellulose based activated carbon cloth has been oxidized by air, nitric acid, hydrogen peroxide and iron nitrate cristallohydrate melt treatments. Thermogravimetric analysis, selective neutralization, X-ray photoelectron spectroscopy and electrical resistance measurements have been applied to characterize the products. The amount and type of oxygen surface groups have been determined for the different oxidation procedures. The amount of surface groups formed decrease with oxidation procedure in the order: iron nitrate, nitric acid, air and hydrogen peroxide.
PB  - Elsevier
T2  - Carbon
T1  - Surface characterization of oxidized activated carbon cloth
VL  - 35
IS  - 8
SP  - 1047
EP  - 1052
DO  - 10.1016/S0008-6223(97)00057-2
ER  - 

@article{
author = "Polovina, Mirjana J. and Babić, Biljana M. and Kaluđerović, Branka and Dekanski, Aleksandar",
year = "1997",
abstract = "Cellulose based activated carbon cloth has been oxidized by air, nitric acid, hydrogen peroxide and iron nitrate cristallohydrate melt treatments. Thermogravimetric analysis, selective neutralization, X-ray photoelectron spectroscopy and electrical resistance measurements have been applied to characterize the products. The amount and type of oxygen surface groups have been determined for the different oxidation procedures. The amount of surface groups formed decrease with oxidation procedure in the order: iron nitrate, nitric acid, air and hydrogen peroxide.",
publisher = "Elsevier",
journal = "Carbon",
title = "Surface characterization of oxidized activated carbon cloth",
volume = "35",
number = "8",
pages = "1047-1052",
doi = "10.1016/S0008-6223(97)00057-2"
}

Polovina, M. J., Babić, B. M., Kaluđerović, B.,& Dekanski, A.. (1997). Surface characterization of oxidized activated carbon cloth. in Carbon
Elsevier., 35(8), 1047-1052.
https://doi.org/10.1016/S0008-6223(97)00057-2

Polovina MJ, Babić BM, Kaluđerović B, Dekanski A. Surface characterization of oxidized activated carbon cloth. in Carbon. 1997;35(8):1047-1052.
doi:10.1016/S0008-6223(97)00057-2 .

Polovina, Mirjana J., Babić, Biljana M., Kaluđerović, Branka, Dekanski, Aleksandar, "Surface characterization of oxidized activated carbon cloth" in Carbon, 35, no. 8 (1997):1047-1052,
https://doi.org/10.1016/S0008-6223(97)00057-2 . .