TY  - JOUR
AU  - Ćurčić, Milica
AU  - Hadžić, Branka B.
AU  - Gilić, Martina
AU  - Radojević, Vesna
AU  - Bjelajac, Anđelika
AU  - Radović, Ivana M.
AU  - Timotijević, Dejan
AU  - Romčević, Maja J.
AU  - Trajić, Jelena
AU  - Romčević, Nebojša Ž.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8494
AB  - The polymer nanocomposite ZnS/Poly (methylmethacrylate) was prepared by the solution casting method and its structural and optical properties were investigated using XRD, SEM, TEM, HRTEM, and Raman spectroscopy. The basic material, ZnS, has the cubic structure and its crystallite size was estimated to be 2.3 nm, which implies that a strong confinement regime is in effect. Analysis of Raman spectra was performed using the fitting procedure based on effective medium theory. As a result, the surface optical phonon (SOP) mode was detected. It was found that the shape and position of the SOP mode depend on the type of the composite. © 2019 Elsevier B.V.
T2  - Physica E: Low-dimensional Systems and Nanostructures
T1  - Surface optical phonon (SOP) mode in ZnS/Poly (methylmethacrylate) nanocomposites
VL  - 115
SP  - 113708
DO  - 10.1016/j.physe.2019.113708
ER  - 

@article{
author = "Ćurčić, Milica and Hadžić, Branka B. and Gilić, Martina and Radojević, Vesna and Bjelajac, Anđelika and Radović, Ivana M. and Timotijević, Dejan and Romčević, Maja J. and Trajić, Jelena and Romčević, Nebojša Ž.",
year = "2020",
abstract = "The polymer nanocomposite ZnS/Poly (methylmethacrylate) was prepared by the solution casting method and its structural and optical properties were investigated using XRD, SEM, TEM, HRTEM, and Raman spectroscopy. The basic material, ZnS, has the cubic structure and its crystallite size was estimated to be 2.3 nm, which implies that a strong confinement regime is in effect. Analysis of Raman spectra was performed using the fitting procedure based on effective medium theory. As a result, the surface optical phonon (SOP) mode was detected. It was found that the shape and position of the SOP mode depend on the type of the composite. © 2019 Elsevier B.V.",
journal = "Physica E: Low-dimensional Systems and Nanostructures",
title = "Surface optical phonon (SOP) mode in ZnS/Poly (methylmethacrylate) nanocomposites",
volume = "115",
pages = "113708",
doi = "10.1016/j.physe.2019.113708"
}

Ćurčić, M., Hadžić, B. B., Gilić, M., Radojević, V., Bjelajac, A., Radović, I. M., Timotijević, D., Romčević, M. J., Trajić, J.,& Romčević, N. Ž.. (2020). Surface optical phonon (SOP) mode in ZnS/Poly (methylmethacrylate) nanocomposites. in Physica E: Low-dimensional Systems and Nanostructures, 115, 113708.
https://doi.org/10.1016/j.physe.2019.113708

Ćurčić M, Hadžić BB, Gilić M, Radojević V, Bjelajac A, Radović IM, Timotijević D, Romčević MJ, Trajić J, Romčević NŽ. Surface optical phonon (SOP) mode in ZnS/Poly (methylmethacrylate) nanocomposites. in Physica E: Low-dimensional Systems and Nanostructures. 2020;115:113708.
doi:10.1016/j.physe.2019.113708 .

Ćurčić, Milica, Hadžić, Branka B., Gilić, Martina, Radojević, Vesna, Bjelajac, Anđelika, Radović, Ivana M., Timotijević, Dejan, Romčević, Maja J., Trajić, Jelena, Romčević, Nebojša Ž., "Surface optical phonon (SOP) mode in ZnS/Poly (methylmethacrylate) nanocomposites" in Physica E: Low-dimensional Systems and Nanostructures, 115 (2020):113708,
https://doi.org/10.1016/j.physe.2019.113708 . .

TY  - JOUR
AU  - Vujančević, Jelena
AU  - Andričević, Pavao
AU  - Bjelajac, Anđelika
AU  - Đokić, Veljko R.
AU  - Popović, Maja
AU  - Rakočević, Zlatko Lj.
AU  - Horvath, Endre
AU  - Kollar, Marton
AU  - Nafradi, Balint
AU  - Schiller, Andreas
AU  - Domanski, Konrad
AU  - Forro, Laszlo
AU  - Pavlović, Vera P.
AU  - Janaćković, Đorđe T.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8538
AB  - Highly ordered, anodically grown TiO 2 nanotubes on titanium supports were annealed in ammonia atmosphere in order to incorporate nitrogen doping (≤2 at.%) in the titanium oxide lattice. FESEM micrographs revealed nanotubes with an average outer diameter of 101.5 ± 1.5 nm and an average wall thickness of about 13 nm. Anatase crystals were formed inside the tubes after annealing in ammonia atmosphere for 30 min. With further annealing, rutile peaks appeared due to the thermal oxidation of the foil and rise as the duration of heat treatment was increased. The concentration and chemical nature of nitrogen in the nanotube arrays can be correlated to the optical response of dry-pressed heterojunctions of doped TiO 2 /CH 3 NH 3 PbI 3 single crystals. The N-TiO 2 /perovskite heterojunction with the highest amount of interstitial nitrogen exhibited an improved photocurrent, indicating the importance of the semiconductor doping-based heterojunction optimization strategies to deliver competitive levels of halide perovskite-based optoelectronic devices to be envisioned for urban infrastructures. © 2019
T2  - Ceramics International
T1  - Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping
VL  - 45
IS  - 8
SP  - 10013
EP  - 10020
DO  - 10.1016/j.ceramint.2019.02.045
ER  - 

@article{
author = "Vujančević, Jelena and Andričević, Pavao and Bjelajac, Anđelika and Đokić, Veljko R. and Popović, Maja and Rakočević, Zlatko Lj. and Horvath, Endre and Kollar, Marton and Nafradi, Balint and Schiller, Andreas and Domanski, Konrad and Forro, Laszlo and Pavlović, Vera P. and Janaćković, Đorđe T.",
year = "2019",
abstract = "Highly ordered, anodically grown TiO 2 nanotubes on titanium supports were annealed in ammonia atmosphere in order to incorporate nitrogen doping (≤2 at.%) in the titanium oxide lattice. FESEM micrographs revealed nanotubes with an average outer diameter of 101.5 ± 1.5 nm and an average wall thickness of about 13 nm. Anatase crystals were formed inside the tubes after annealing in ammonia atmosphere for 30 min. With further annealing, rutile peaks appeared due to the thermal oxidation of the foil and rise as the duration of heat treatment was increased. The concentration and chemical nature of nitrogen in the nanotube arrays can be correlated to the optical response of dry-pressed heterojunctions of doped TiO 2 /CH 3 NH 3 PbI 3 single crystals. The N-TiO 2 /perovskite heterojunction with the highest amount of interstitial nitrogen exhibited an improved photocurrent, indicating the importance of the semiconductor doping-based heterojunction optimization strategies to deliver competitive levels of halide perovskite-based optoelectronic devices to be envisioned for urban infrastructures. © 2019",
journal = "Ceramics International",
title = "Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping",
volume = "45",
number = "8",
pages = "10013-10020",
doi = "10.1016/j.ceramint.2019.02.045"
}

Vujančević, J., Andričević, P., Bjelajac, A., Đokić, V. R., Popović, M., Rakočević, Z. Lj., Horvath, E., Kollar, M., Nafradi, B., Schiller, A., Domanski, K., Forro, L., Pavlović, V. P.,& Janaćković, Đ. T.. (2019). Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping. in Ceramics International, 45(8), 10013-10020.
https://doi.org/10.1016/j.ceramint.2019.02.045

Vujančević J, Andričević P, Bjelajac A, Đokić VR, Popović M, Rakočević ZL, Horvath E, Kollar M, Nafradi B, Schiller A, Domanski K, Forro L, Pavlović VP, Janaćković ĐT. Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping. in Ceramics International. 2019;45(8):10013-10020.
doi:10.1016/j.ceramint.2019.02.045 .

Vujančević, Jelena, Andričević, Pavao, Bjelajac, Anđelika, Đokić, Veljko R., Popović, Maja, Rakočević, Zlatko Lj., Horvath, Endre, Kollar, Marton, Nafradi, Balint, Schiller, Andreas, Domanski, Konrad, Forro, Laszlo, Pavlović, Vera P., Janaćković, Đorđe T., "Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping" in Ceramics International, 45, no. 8 (2019):10013-10020,
https://doi.org/10.1016/j.ceramint.2019.02.045 . .

TY  - JOUR
AU  - Vujančević, Jelena
AU  - Andričević, Pavao
AU  - Bjelajac, Anđelika
AU  - Đokić, Veljko R.
AU  - Popović, Maja
AU  - Rakočević, Zlatko Lj.
AU  - Horvath, Endre
AU  - Kollar, Marton
AU  - Nafradi, Balint
AU  - Schiller, Andreas
AU  - Domanski, Konrad
AU  - Forro, Laszlo
AU  - Pavlović, Vera P.
AU  - Janaćković, Đorđe T.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8539
AB  - Highly ordered, anodically grown TiO 2 nanotubes on titanium supports were annealed in ammonia atmosphere in order to incorporate nitrogen doping (≤2 at.%) in the titanium oxide lattice. FESEM micrographs revealed nanotubes with an average outer diameter of 101.5 ± 1.5 nm and an average wall thickness of about 13 nm. Anatase crystals were formed inside the tubes after annealing in ammonia atmosphere for 30 min. With further annealing, rutile peaks appeared due to the thermal oxidation of the foil and rise as the duration of heat treatment was increased. The concentration and chemical nature of nitrogen in the nanotube arrays can be correlated to the optical response of dry-pressed heterojunctions of doped TiO 2 /CH 3 NH 3 PbI 3 single crystals. The N-TiO 2 /perovskite heterojunction with the highest amount of interstitial nitrogen exhibited an improved photocurrent, indicating the importance of the semiconductor doping-based heterojunction optimization strategies to deliver competitive levels of halide perovskite-based optoelectronic devices to be envisioned for urban infrastructures. © 2019
T2  - Ceramics International
T1  - Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping
VL  - 45
IS  - 8
SP  - 10013
EP  - 10020
DO  - 10.1016/j.ceramint.2019.02.045
ER  - 

@article{
author = "Vujančević, Jelena and Andričević, Pavao and Bjelajac, Anđelika and Đokić, Veljko R. and Popović, Maja and Rakočević, Zlatko Lj. and Horvath, Endre and Kollar, Marton and Nafradi, Balint and Schiller, Andreas and Domanski, Konrad and Forro, Laszlo and Pavlović, Vera P. and Janaćković, Đorđe T.",
year = "2019",
abstract = "Highly ordered, anodically grown TiO 2 nanotubes on titanium supports were annealed in ammonia atmosphere in order to incorporate nitrogen doping (≤2 at.%) in the titanium oxide lattice. FESEM micrographs revealed nanotubes with an average outer diameter of 101.5 ± 1.5 nm and an average wall thickness of about 13 nm. Anatase crystals were formed inside the tubes after annealing in ammonia atmosphere for 30 min. With further annealing, rutile peaks appeared due to the thermal oxidation of the foil and rise as the duration of heat treatment was increased. The concentration and chemical nature of nitrogen in the nanotube arrays can be correlated to the optical response of dry-pressed heterojunctions of doped TiO 2 /CH 3 NH 3 PbI 3 single crystals. The N-TiO 2 /perovskite heterojunction with the highest amount of interstitial nitrogen exhibited an improved photocurrent, indicating the importance of the semiconductor doping-based heterojunction optimization strategies to deliver competitive levels of halide perovskite-based optoelectronic devices to be envisioned for urban infrastructures. © 2019",
journal = "Ceramics International",
title = "Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping",
volume = "45",
number = "8",
pages = "10013-10020",
doi = "10.1016/j.ceramint.2019.02.045"
}

Vujančević, J., Andričević, P., Bjelajac, A., Đokić, V. R., Popović, M., Rakočević, Z. Lj., Horvath, E., Kollar, M., Nafradi, B., Schiller, A., Domanski, K., Forro, L., Pavlović, V. P.,& Janaćković, Đ. T.. (2019). Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping. in Ceramics International, 45(8), 10013-10020.
https://doi.org/10.1016/j.ceramint.2019.02.045

Vujančević J, Andričević P, Bjelajac A, Đokić VR, Popović M, Rakočević ZL, Horvath E, Kollar M, Nafradi B, Schiller A, Domanski K, Forro L, Pavlović VP, Janaćković ĐT. Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping. in Ceramics International. 2019;45(8):10013-10020.
doi:10.1016/j.ceramint.2019.02.045 .

Vujančević, Jelena, Andričević, Pavao, Bjelajac, Anđelika, Đokić, Veljko R., Popović, Maja, Rakočević, Zlatko Lj., Horvath, Endre, Kollar, Marton, Nafradi, Balint, Schiller, Andreas, Domanski, Konrad, Forro, Laszlo, Pavlović, Vera P., Janaćković, Đorđe T., "Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping" in Ceramics International, 45, no. 8 (2019):10013-10020,
https://doi.org/10.1016/j.ceramint.2019.02.045 . .

TY  - JOUR
AU  - Bjelajac, Anđelika
AU  - Petrović, Rada
AU  - Popović, Maja
AU  - Rakočević, Zlatko Lj.
AU  - Socol, Gabriel
AU  - Mihailescu, Ion N.
AU  - Janaćković, Đorđe T.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8589
AB  - The ∼60 nm wide and ∼2 μm long TiO2 nanotubes were obtained by anodization of Ti films sputtered on F-doped tin oxide glass. For N-doping the samples were annealed in ammonia atmosphere. The effect of pre- and post-annealing in air on the nature and amount of incorporated N was studied by X-ray photoelectron spectroscopy. By measuring the absorption spectra of the obtained samples and interpreting the corresponding Tauc plots it was shown that the sample annealed just in ammonia showed the highest visible light absorption even after sputtering cleaning and a decrease of N amount from 3.8% to 1%. Pre and/or post annealing in air led to smaller amount of incorporated N, that caused less pronounced absorption enhancement and smaller band gap narrowing compared to the sample annealed only in ammonia. By fitting of N 1 s line, the contribution that was assigned to substitutional N was detected only in the samples that did not sustained post-annealing. The study showed that post-annealing in air might lead to partial conversion of N atoms in TiO2 to oxidized nitrogen species that are easily removed with sputtering. It is also possible that substitutional nitrogen was suppressed by oxygen from air to move to interstitial site. Weakly bonded NOx surface species, which are cleaned away by sputtering, can be removed by post-annealing in air. Those surface species could act as sensitizers and when their amounts are reduced, the core absorption properties, as a result of interstitial incorporation of N in TiO2 structure, were revealed. Much lower visible light sensitization was achieved in the case of pre-annealed sample in comparison to sample without pre-annealing, regardless the same quantity and type of incorporated nitrogen.
T2  - Thin Solid Films
T1  - Doping of TiO2 nanotubes with nitrogen by annealing in ammonia for visible light activation: Influence of pre- and post-annealing in air
VL  - 692
SP  - 137598
DO  - 10.1016/j.tsf.2019.137598
ER  - 

@article{
author = "Bjelajac, Anđelika and Petrović, Rada and Popović, Maja and Rakočević, Zlatko Lj. and Socol, Gabriel and Mihailescu, Ion N. and Janaćković, Đorđe T.",
year = "2019",
abstract = "The ∼60 nm wide and ∼2 μm long TiO2 nanotubes were obtained by anodization of Ti films sputtered on F-doped tin oxide glass. For N-doping the samples were annealed in ammonia atmosphere. The effect of pre- and post-annealing in air on the nature and amount of incorporated N was studied by X-ray photoelectron spectroscopy. By measuring the absorption spectra of the obtained samples and interpreting the corresponding Tauc plots it was shown that the sample annealed just in ammonia showed the highest visible light absorption even after sputtering cleaning and a decrease of N amount from 3.8% to 1%. Pre and/or post annealing in air led to smaller amount of incorporated N, that caused less pronounced absorption enhancement and smaller band gap narrowing compared to the sample annealed only in ammonia. By fitting of N 1 s line, the contribution that was assigned to substitutional N was detected only in the samples that did not sustained post-annealing. The study showed that post-annealing in air might lead to partial conversion of N atoms in TiO2 to oxidized nitrogen species that are easily removed with sputtering. It is also possible that substitutional nitrogen was suppressed by oxygen from air to move to interstitial site. Weakly bonded NOx surface species, which are cleaned away by sputtering, can be removed by post-annealing in air. Those surface species could act as sensitizers and when their amounts are reduced, the core absorption properties, as a result of interstitial incorporation of N in TiO2 structure, were revealed. Much lower visible light sensitization was achieved in the case of pre-annealed sample in comparison to sample without pre-annealing, regardless the same quantity and type of incorporated nitrogen.",
journal = "Thin Solid Films",
title = "Doping of TiO2 nanotubes with nitrogen by annealing in ammonia for visible light activation: Influence of pre- and post-annealing in air",
volume = "692",
pages = "137598",
doi = "10.1016/j.tsf.2019.137598"
}

Bjelajac, A., Petrović, R., Popović, M., Rakočević, Z. Lj., Socol, G., Mihailescu, I. N.,& Janaćković, Đ. T.. (2019). Doping of TiO2 nanotubes with nitrogen by annealing in ammonia for visible light activation: Influence of pre- and post-annealing in air. in Thin Solid Films, 692, 137598.
https://doi.org/10.1016/j.tsf.2019.137598

Bjelajac A, Petrović R, Popović M, Rakočević ZL, Socol G, Mihailescu IN, Janaćković ĐT. Doping of TiO2 nanotubes with nitrogen by annealing in ammonia for visible light activation: Influence of pre- and post-annealing in air. in Thin Solid Films. 2019;692:137598.
doi:10.1016/j.tsf.2019.137598 .

Bjelajac, Anđelika, Petrović, Rada, Popović, Maja, Rakočević, Zlatko Lj., Socol, Gabriel, Mihailescu, Ion N., Janaćković, Đorđe T., "Doping of TiO2 nanotubes with nitrogen by annealing in ammonia for visible light activation: Influence of pre- and post-annealing in air" in Thin Solid Films, 692 (2019):137598,
https://doi.org/10.1016/j.tsf.2019.137598 . .

TY  - JOUR
AU  - Abozaid, Rouaida Mohamed
AU  - Lazarević, Zorica Ž.
AU  - Radović, Ivana M.
AU  - Gilić, Martina
AU  - Šević, Dragutin M.
AU  - Rabasović, Maja S.
AU  - Radojević, Vesna
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0925346719303131
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8195
AB  - Processing and characterization of polymer nanocomposites based on poly (methyl methacrylate) (PMMA) matrix with embedded core-shell CdSe/ZnS quantum dots (QD's) were presented in this work. The aim is to preserve the optical activity of QD's in nanocomposite processing with improved mechanical properties. The modification of QD's CdSe/ZnS-PMMA interface was achieved with 3-mercaptopropyltrimethoxysilane (MPTMS). Nanocomposites were processed by solution casting. The samples of pure PMMA, and composites with unmodified and silane modified QD's CdSe/ZnS were processed. FTIR analysis revealed modification of QD's with silane and characteristic bonding with PMMA matrix. Raman spectrum confirms a presence of alloyed layer at the core-shell interface. Time-resolved laser induced fluorescence measurements confirmed slight blue shift in QD's CdSe/ZnS-PMMA composite without interface modification, while there was a slight red shift with modified particles. Oxidation effects in quantum dots were removed with the use of PMMA as a host, and the core remained active, which was confirmed with FTIR analysis and time-resolved laser induced fluorescence measurements. © 2019
T2  - Optical Materials
T1  - Optical properties and fluorescence of quantum dots CdSe/ZnS-PMMA composite films with interface modifications
VL  - 92
SP  - 405
EP  - 410
DO  - 10.1016/j.optmat.2019.05.012
ER  - 

@article{
author = "Abozaid, Rouaida Mohamed and Lazarević, Zorica Ž. and Radović, Ivana M. and Gilić, Martina and Šević, Dragutin M. and Rabasović, Maja S. and Radojević, Vesna",
year = "2019",
abstract = "Processing and characterization of polymer nanocomposites based on poly (methyl methacrylate) (PMMA) matrix with embedded core-shell CdSe/ZnS quantum dots (QD's) were presented in this work. The aim is to preserve the optical activity of QD's in nanocomposite processing with improved mechanical properties. The modification of QD's CdSe/ZnS-PMMA interface was achieved with 3-mercaptopropyltrimethoxysilane (MPTMS). Nanocomposites were processed by solution casting. The samples of pure PMMA, and composites with unmodified and silane modified QD's CdSe/ZnS were processed. FTIR analysis revealed modification of QD's with silane and characteristic bonding with PMMA matrix. Raman spectrum confirms a presence of alloyed layer at the core-shell interface. Time-resolved laser induced fluorescence measurements confirmed slight blue shift in QD's CdSe/ZnS-PMMA composite without interface modification, while there was a slight red shift with modified particles. Oxidation effects in quantum dots were removed with the use of PMMA as a host, and the core remained active, which was confirmed with FTIR analysis and time-resolved laser induced fluorescence measurements. © 2019",
journal = "Optical Materials",
title = "Optical properties and fluorescence of quantum dots CdSe/ZnS-PMMA composite films with interface modifications",
volume = "92",
pages = "405-410",
doi = "10.1016/j.optmat.2019.05.012"
}

Abozaid, R. M., Lazarević, Z. Ž., Radović, I. M., Gilić, M., Šević, D. M., Rabasović, M. S.,& Radojević, V.. (2019). Optical properties and fluorescence of quantum dots CdSe/ZnS-PMMA composite films with interface modifications. in Optical Materials, 92, 405-410.
https://doi.org/10.1016/j.optmat.2019.05.012

Abozaid RM, Lazarević ZŽ, Radović IM, Gilić M, Šević DM, Rabasović MS, Radojević V. Optical properties and fluorescence of quantum dots CdSe/ZnS-PMMA composite films with interface modifications. in Optical Materials. 2019;92:405-410.
doi:10.1016/j.optmat.2019.05.012 .

Abozaid, Rouaida Mohamed, Lazarević, Zorica Ž., Radović, Ivana M., Gilić, Martina, Šević, Dragutin M., Rabasović, Maja S., Radojević, Vesna, "Optical properties and fluorescence of quantum dots CdSe/ZnS-PMMA composite films with interface modifications" in Optical Materials, 92 (2019):405-410,
https://doi.org/10.1016/j.optmat.2019.05.012 . .

TY  - JOUR
AU  - Stajčić, Aleksandar
AU  - Radović, Ivana M.
AU  - Ćosović, Vladan
AU  - Grujić, Aleksandar S.
AU  - Stajić-Trošić, Jasna T.
AU  - Jančić-Heinemann, Radmila
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8597
AB  - This study presents preparation and characterization of ethyl cellulose based nanocomposites. Successful use of simple solvent casting technique provided nanocomposites with high loads of barium ferrite magnetic nanopowder in the polymer matrix, promising significant improvement of mechanical properties. Investigation of morphology revealed formation of agglomerates that are still on nanoscopic level. Nanocomposite thin films with a higher content of the magnetic powder showed substantial enhancement of break strength, elongation and microhardness compared to the pure ethyl cellulose, which was the primary aim of this research.
T2  - Science of Sintering
T1  - The influence of barium ferrite nanoparticles on morphological and mechanical properties of ethyl cellulose based nanocomposites
VL  - 51
IS  - 3
SP  - 277
EP  - 283
DO  - 10.2298/SOS1903277S
ER  - 

@article{
author = "Stajčić, Aleksandar and Radović, Ivana M. and Ćosović, Vladan and Grujić, Aleksandar S. and Stajić-Trošić, Jasna T. and Jančić-Heinemann, Radmila",
year = "2019",
abstract = "This study presents preparation and characterization of ethyl cellulose based nanocomposites. Successful use of simple solvent casting technique provided nanocomposites with high loads of barium ferrite magnetic nanopowder in the polymer matrix, promising significant improvement of mechanical properties. Investigation of morphology revealed formation of agglomerates that are still on nanoscopic level. Nanocomposite thin films with a higher content of the magnetic powder showed substantial enhancement of break strength, elongation and microhardness compared to the pure ethyl cellulose, which was the primary aim of this research.",
journal = "Science of Sintering",
title = "The influence of barium ferrite nanoparticles on morphological and mechanical properties of ethyl cellulose based nanocomposites",
volume = "51",
number = "3",
pages = "277-283",
doi = "10.2298/SOS1903277S"
}

Stajčić, A., Radović, I. M., Ćosović, V., Grujić, A. S., Stajić-Trošić, J. T.,& Jančić-Heinemann, R.. (2019). The influence of barium ferrite nanoparticles on morphological and mechanical properties of ethyl cellulose based nanocomposites. in Science of Sintering, 51(3), 277-283.
https://doi.org/10.2298/SOS1903277S

Stajčić A, Radović IM, Ćosović V, Grujić AS, Stajić-Trošić JT, Jančić-Heinemann R. The influence of barium ferrite nanoparticles on morphological and mechanical properties of ethyl cellulose based nanocomposites. in Science of Sintering. 2019;51(3):277-283.
doi:10.2298/SOS1903277S .

Stajčić, Aleksandar, Radović, Ivana M., Ćosović, Vladan, Grujić, Aleksandar S., Stajić-Trošić, Jasna T., Jančić-Heinemann, Radmila, "The influence of barium ferrite nanoparticles on morphological and mechanical properties of ethyl cellulose based nanocomposites" in Science of Sintering, 51, no. 3 (2019):277-283,
https://doi.org/10.2298/SOS1903277S . .

TY  - JOUR
AU  - Savić, Andrija B.
AU  - Čokeša, Đuro
AU  - Savić-Biserčić, Marjetka
AU  - Janković-Častvan, Ivona
AU  - Petrović, Rada
AU  - Živković, Ljiljana
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0921883119301529
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8221
AB  - Natural filtration material tuff (T) was modified by coating with nano-sized magnetite. The grain fraction of 0.6–1.9 mm was submitted to hydrothermal synthesis of magnetite. Thus formed magnetite modified tuff (MMT) was characterized in terms of Fe-content, N2 adsorption- desorption isotherm, SEM, zeta potential-pH analyses and adsorption behavior towards phosphates/arsenates in batch and column conditions. Elemental analysis showed that 36.54 mg g−1 of magnetite was attached to the porous tuff grains. This modification changed pore structure and specific surface area. An increase of cca 35% in Sp value was obtained. Batch experiments proved that MMT was 4-5 times more efficient in removal of phosphates/arsenates than non-modified T. The maximum sorption capacities of phosphates calculated based on Langmuir equation were 0.45 and 1.91 mg g−1, while those for arsenate were 0.551 m g−1 and 2.36 mg g−1 for T and MMT, respectively. The intra-particle diffusion model was the most suited for describing the adsorption process of phosphate and arsenate onto MMT. Fixed-bed column data corroborated batch results, i.e. MMT was 6 times superior in contaminant adsorption than T. Modification with magnetite improved T potential for usage in water treatment applications: its filtration ability remained unchanged, while adsorption capacity for phosphates/arsenates removal was improved. © 2019 The Society of Powder Technology Japan
T2  - Advanced Powder Technology
T1  - Multifunctional use of magnetite-coated tuff grains in water treatment: Removal of arsenates and phosphates
VL  - 30
IS  - 8
SP  - 1687
EP  - 1695
DO  - 10.1016/j.apt.2019.05.020
ER  - 

@article{
author = "Savić, Andrija B. and Čokeša, Đuro and Savić-Biserčić, Marjetka and Janković-Častvan, Ivona and Petrović, Rada and Živković, Ljiljana",
year = "2019",
abstract = "Natural filtration material tuff (T) was modified by coating with nano-sized magnetite. The grain fraction of 0.6–1.9 mm was submitted to hydrothermal synthesis of magnetite. Thus formed magnetite modified tuff (MMT) was characterized in terms of Fe-content, N2 adsorption- desorption isotherm, SEM, zeta potential-pH analyses and adsorption behavior towards phosphates/arsenates in batch and column conditions. Elemental analysis showed that 36.54 mg g−1 of magnetite was attached to the porous tuff grains. This modification changed pore structure and specific surface area. An increase of cca 35% in Sp value was obtained. Batch experiments proved that MMT was 4-5 times more efficient in removal of phosphates/arsenates than non-modified T. The maximum sorption capacities of phosphates calculated based on Langmuir equation were 0.45 and 1.91 mg g−1, while those for arsenate were 0.551 m g−1 and 2.36 mg g−1 for T and MMT, respectively. The intra-particle diffusion model was the most suited for describing the adsorption process of phosphate and arsenate onto MMT. Fixed-bed column data corroborated batch results, i.e. MMT was 6 times superior in contaminant adsorption than T. Modification with magnetite improved T potential for usage in water treatment applications: its filtration ability remained unchanged, while adsorption capacity for phosphates/arsenates removal was improved. © 2019 The Society of Powder Technology Japan",
journal = "Advanced Powder Technology",
title = "Multifunctional use of magnetite-coated tuff grains in water treatment: Removal of arsenates and phosphates",
volume = "30",
number = "8",
pages = "1687-1695",
doi = "10.1016/j.apt.2019.05.020"
}

Savić, A. B., Čokeša, Đ., Savić-Biserčić, M., Janković-Častvan, I., Petrović, R.,& Živković, L.. (2019). Multifunctional use of magnetite-coated tuff grains in water treatment: Removal of arsenates and phosphates. in Advanced Powder Technology, 30(8), 1687-1695.
https://doi.org/10.1016/j.apt.2019.05.020

Savić AB, Čokeša Đ, Savić-Biserčić M, Janković-Častvan I, Petrović R, Živković L. Multifunctional use of magnetite-coated tuff grains in water treatment: Removal of arsenates and phosphates. in Advanced Powder Technology. 2019;30(8):1687-1695.
doi:10.1016/j.apt.2019.05.020 .

Savić, Andrija B., Čokeša, Đuro, Savić-Biserčić, Marjetka, Janković-Častvan, Ivona, Petrović, Rada, Živković, Ljiljana, "Multifunctional use of magnetite-coated tuff grains in water treatment: Removal of arsenates and phosphates" in Advanced Powder Technology, 30, no. 8 (2019):1687-1695,
https://doi.org/10.1016/j.apt.2019.05.020 . .

TY  - JOUR
AU  - Tomić, Nataša Z.
AU  - Vuksanović, Marija M.
AU  - Đokić, Veljko R.
AU  - Mitrić, Miodrag
AU  - Simić, Milena R.
AU  - Pavlović, Vladimir B.
AU  - Jančić-Heinemann, Radmila
AU  - Marinković, Aleksandar D.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8650
AB  - A facile synthesis was employed for three polyhedral oligo silsequioxanes (POSS), obtaining incompletely condensed structures with fern-like and cubic morphologies. Proton nuclear magnetic resonance spectroscopy (1H NMR) indicated the successful synthesis of the proposed POSS structures. The hydroxyl groups affected the manner and type of POSS morphology, as seen under a scanning electron microscope (SEM) and a transmission electron microscope (TEM). Fourier-transform infrared spectroscopy (FTIR) showed the availability of surface hydroxyl groups that contributed to the formation of a higher amount of char residue, as found from TGA analysis. The highest decomposition temperature (281 °C) and the least char residue were found for a cross-linkable POSS, obtained by esterification of the hydroxyl groups with methacryloyl chloride. © 2019 Elsevier Ltd
T2  - Polyhedron
T1  - Synthesis and characterization of nanocrystalline polyhedral oligo silsesquioxanes (POSS) with cross-linkable functionalities
VL  - 171
SP  - 299
EP  - 304
DO  - 10.1016/j.poly.2019.06.059
ER  - 

@article{
author = "Tomić, Nataša Z. and Vuksanović, Marija M. and Đokić, Veljko R. and Mitrić, Miodrag and Simić, Milena R. and Pavlović, Vladimir B. and Jančić-Heinemann, Radmila and Marinković, Aleksandar D.",
year = "2019",
abstract = "A facile synthesis was employed for three polyhedral oligo silsequioxanes (POSS), obtaining incompletely condensed structures with fern-like and cubic morphologies. Proton nuclear magnetic resonance spectroscopy (1H NMR) indicated the successful synthesis of the proposed POSS structures. The hydroxyl groups affected the manner and type of POSS morphology, as seen under a scanning electron microscope (SEM) and a transmission electron microscope (TEM). Fourier-transform infrared spectroscopy (FTIR) showed the availability of surface hydroxyl groups that contributed to the formation of a higher amount of char residue, as found from TGA analysis. The highest decomposition temperature (281 °C) and the least char residue were found for a cross-linkable POSS, obtained by esterification of the hydroxyl groups with methacryloyl chloride. © 2019 Elsevier Ltd",
journal = "Polyhedron",
title = "Synthesis and characterization of nanocrystalline polyhedral oligo silsesquioxanes (POSS) with cross-linkable functionalities",
volume = "171",
pages = "299-304",
doi = "10.1016/j.poly.2019.06.059"
}

Tomić, N. Z., Vuksanović, M. M., Đokić, V. R., Mitrić, M., Simić, M. R., Pavlović, V. B., Jančić-Heinemann, R.,& Marinković, A. D.. (2019). Synthesis and characterization of nanocrystalline polyhedral oligo silsesquioxanes (POSS) with cross-linkable functionalities. in Polyhedron, 171, 299-304.
https://doi.org/10.1016/j.poly.2019.06.059

Tomić NZ, Vuksanović MM, Đokić VR, Mitrić M, Simić MR, Pavlović VB, Jančić-Heinemann R, Marinković AD. Synthesis and characterization of nanocrystalline polyhedral oligo silsesquioxanes (POSS) with cross-linkable functionalities. in Polyhedron. 2019;171:299-304.
doi:10.1016/j.poly.2019.06.059 .

Tomić, Nataša Z., Vuksanović, Marija M., Đokić, Veljko R., Mitrić, Miodrag, Simić, Milena R., Pavlović, Vladimir B., Jančić-Heinemann, Radmila, Marinković, Aleksandar D., "Synthesis and characterization of nanocrystalline polyhedral oligo silsesquioxanes (POSS) with cross-linkable functionalities" in Polyhedron, 171 (2019):299-304,
https://doi.org/10.1016/j.poly.2019.06.059 . .

TY  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
AU  - Balać, Igor
AU  - Đorđević, Antonije
AU  - Pavlović, Vladimir B.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8441
AB  - Alumina-based compounds have many technological applications and attract great attention even after decades of investigation, due to their good chemical, electrical, and mechanical properties. A mixture of several alumina modifications (α-, κ-, γ-Al2O3) doped with 1 wt% of Mn2O3 was used for this experiment. The powder was mechanically activated for 60 min in an ethanol medium. After compaction, green bodies were sintered in the temperature range from 1200 to 1400 °C. Microstructures of the obtained specimens were investigated by scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDS). The influence of morphological changes on electrical and mechanical properties was examined in detail. We have developed a test fixture and corresponding software for measurement of the relative dielectric permittivity and the loss tangent of ceramic specimens. This new method overcomes the problems of dimensions and shape of samples, as well as the problem of applying silver paste. The accuracy is around 2% for ε'r and 0.003 for tanδ. We demonstrate that the mechanical activation (MA) has the dominant influence on lowering the characteristic temperatures and microstructure development, which further leads to increased permittivity and tensile strength.
T2  - Advanced Powder Technology
T1  - The effect of ball milling on properties of sintered manganese-doped alumina
VL  - 30
IS  - 11
SP  - 2533
EP  - 2540
DO  - 10.1016/j.apt.2019.07.033
ER  - 

@article{
author = "Filipović, Suzana and Obradović, Nina and Marković, Smilja and Mitrić, Miodrag and Balać, Igor and Đorđević, Antonije and Pavlović, Vladimir B.",
year = "2019",
abstract = "Alumina-based compounds have many technological applications and attract great attention even after decades of investigation, due to their good chemical, electrical, and mechanical properties. A mixture of several alumina modifications (α-, κ-, γ-Al2O3) doped with 1 wt% of Mn2O3 was used for this experiment. The powder was mechanically activated for 60 min in an ethanol medium. After compaction, green bodies were sintered in the temperature range from 1200 to 1400 °C. Microstructures of the obtained specimens were investigated by scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDS). The influence of morphological changes on electrical and mechanical properties was examined in detail. We have developed a test fixture and corresponding software for measurement of the relative dielectric permittivity and the loss tangent of ceramic specimens. This new method overcomes the problems of dimensions and shape of samples, as well as the problem of applying silver paste. The accuracy is around 2% for ε'r and 0.003 for tanδ. We demonstrate that the mechanical activation (MA) has the dominant influence on lowering the characteristic temperatures and microstructure development, which further leads to increased permittivity and tensile strength.",
journal = "Advanced Powder Technology",
title = "The effect of ball milling on properties of sintered manganese-doped alumina",
volume = "30",
number = "11",
pages = "2533-2540",
doi = "10.1016/j.apt.2019.07.033"
}

Filipović, S., Obradović, N., Marković, S., Mitrić, M., Balać, I., Đorđević, A.,& Pavlović, V. B.. (2019). The effect of ball milling on properties of sintered manganese-doped alumina. in Advanced Powder Technology, 30(11), 2533-2540.
https://doi.org/10.1016/j.apt.2019.07.033

Filipović S, Obradović N, Marković S, Mitrić M, Balać I, Đorđević A, Pavlović VB. The effect of ball milling on properties of sintered manganese-doped alumina. in Advanced Powder Technology. 2019;30(11):2533-2540.
doi:10.1016/j.apt.2019.07.033 .

Filipović, Suzana, Obradović, Nina, Marković, Smilja, Mitrić, Miodrag, Balać, Igor, Đorđević, Antonije, Pavlović, Vladimir B., "The effect of ball milling on properties of sintered manganese-doped alumina" in Advanced Powder Technology, 30, no. 11 (2019):2533-2540,
https://doi.org/10.1016/j.apt.2019.07.033 . .

TY  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Marković, Smilja
AU  - Mitrić, Miodrag
AU  - Balać, Igor
AU  - Đorđević, Antonije
AU  - Pavlović, Vladimir B.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8442
AB  - Alumina-based compounds have many technological applications and attract great attention even after decades of investigation, due to their good chemical, electrical, and mechanical properties. A mixture of several alumina modifications (α-, κ-, γ-Al2O3) doped with 1 wt% of Mn2O3 was used for this experiment. The powder was mechanically activated for 60 min in an ethanol medium. After compaction, green bodies were sintered in the temperature range from 1200 to 1400 °C. Microstructures of the obtained specimens were investigated by scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDS). The influence of morphological changes on electrical and mechanical properties was examined in detail. We have developed a test fixture and corresponding software for measurement of the relative dielectric permittivity and the loss tangent of ceramic specimens. This new method overcomes the problems of dimensions and shape of samples, as well as the problem of applying silver paste. The accuracy is around 2% for ε'r and 0.003 for tanδ. We demonstrate that the mechanical activation (MA) has the dominant influence on lowering the characteristic temperatures and microstructure development, which further leads to increased permittivity and tensile strength.
T2  - Advanced Powder Technology
T1  - The effect of ball milling on properties of sintered manganese-doped alumina
VL  - 30
IS  - 11
SP  - 2533
EP  - 2540
DO  - 10.1016/j.apt.2019.07.033
ER  - 

@article{
author = "Filipović, Suzana and Obradović, Nina and Marković, Smilja and Mitrić, Miodrag and Balać, Igor and Đorđević, Antonije and Pavlović, Vladimir B.",
year = "2019",
abstract = "Alumina-based compounds have many technological applications and attract great attention even after decades of investigation, due to their good chemical, electrical, and mechanical properties. A mixture of several alumina modifications (α-, κ-, γ-Al2O3) doped with 1 wt% of Mn2O3 was used for this experiment. The powder was mechanically activated for 60 min in an ethanol medium. After compaction, green bodies were sintered in the temperature range from 1200 to 1400 °C. Microstructures of the obtained specimens were investigated by scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDS). The influence of morphological changes on electrical and mechanical properties was examined in detail. We have developed a test fixture and corresponding software for measurement of the relative dielectric permittivity and the loss tangent of ceramic specimens. This new method overcomes the problems of dimensions and shape of samples, as well as the problem of applying silver paste. The accuracy is around 2% for ε'r and 0.003 for tanδ. We demonstrate that the mechanical activation (MA) has the dominant influence on lowering the characteristic temperatures and microstructure development, which further leads to increased permittivity and tensile strength.",
journal = "Advanced Powder Technology",
title = "The effect of ball milling on properties of sintered manganese-doped alumina",
volume = "30",
number = "11",
pages = "2533-2540",
doi = "10.1016/j.apt.2019.07.033"
}

Filipović, S., Obradović, N., Marković, S., Mitrić, M., Balać, I., Đorđević, A.,& Pavlović, V. B.. (2019). The effect of ball milling on properties of sintered manganese-doped alumina. in Advanced Powder Technology, 30(11), 2533-2540.
https://doi.org/10.1016/j.apt.2019.07.033

Filipović S, Obradović N, Marković S, Mitrić M, Balać I, Đorđević A, Pavlović VB. The effect of ball milling on properties of sintered manganese-doped alumina. in Advanced Powder Technology. 2019;30(11):2533-2540.
doi:10.1016/j.apt.2019.07.033 .

Filipović, Suzana, Obradović, Nina, Marković, Smilja, Mitrić, Miodrag, Balać, Igor, Đorđević, Antonije, Pavlović, Vladimir B., "The effect of ball milling on properties of sintered manganese-doped alumina" in Advanced Powder Technology, 30, no. 11 (2019):2533-2540,
https://doi.org/10.1016/j.apt.2019.07.033 . .

TY  - JOUR
AU  - Georgijević, Radovan
AU  - Vujković, Milica
AU  - Gutić, Sanjin J.
AU  - Aliefendić, Meho
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Đokić, Veljko R.
AU  - Mentus, Slavko V.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7936
AB  - To contribute to the knowledge on the influence of synthesis procedure on the intercalation kinetics of lithium ions into phospho-olivines, LiFePO4/C composite samples (LFPC) were synthesized in two ways, the first one in a sol-gel procedure (SG), and the other in a solid-state reaction (SS). The X-ray diffractograms (XRD) of both samples overlapped with that of pure LiFePO4, taken from the crystallographic database. Scanning electron microscopy pictures indicated the high degree of interparticle sintering, which caused a considerable agglomerate growth. The results of potentiodynamic measurements in aqueous LiNO3 solution revealed that for SS sample, three times higher initial capacity from that of SG one, (amounting to 74 mAh g−1 at 5 mV s−1). However, capacity fade on rising scan rate is much more expressed for SS sample than for SG one. We suggest that a different degree of material utilization due to the incomplete coverage of olivine particles by carbon explains this difference. The technique of separation of diffusion and capacitance currents was applied in a kinetic analysis, but it was shown to be inappropriate. We suggest the inapplicability of classic CV theory to the intercalation system accompanied by phase transition. Instead, a model of ohmic resistance determination of process kinetics was considered. LFPC-SS sample delivers three times larger capacity in LiNO3, amounting to 74 mAh g−1 at 1 mV s−1.
T2  - Journal of Alloys and Compounds
T1  - The influence of synthesis conditions on the redox behaviour of LiFePO4 in aqueous solution
VL  - 776
SP  - 475
EP  - 485
DO  - 10.1016/j.jallcom.2018.10.246
ER  - 

@article{
author = "Georgijević, Radovan and Vujković, Milica and Gutić, Sanjin J. and Aliefendić, Meho and Jugović, Dragana and Mitrić, Miodrag and Đokić, Veljko R. and Mentus, Slavko V.",
year = "2019",
abstract = "To contribute to the knowledge on the influence of synthesis procedure on the intercalation kinetics of lithium ions into phospho-olivines, LiFePO4/C composite samples (LFPC) were synthesized in two ways, the first one in a sol-gel procedure (SG), and the other in a solid-state reaction (SS). The X-ray diffractograms (XRD) of both samples overlapped with that of pure LiFePO4, taken from the crystallographic database. Scanning electron microscopy pictures indicated the high degree of interparticle sintering, which caused a considerable agglomerate growth. The results of potentiodynamic measurements in aqueous LiNO3 solution revealed that for SS sample, three times higher initial capacity from that of SG one, (amounting to 74 mAh g−1 at 5 mV s−1). However, capacity fade on rising scan rate is much more expressed for SS sample than for SG one. We suggest that a different degree of material utilization due to the incomplete coverage of olivine particles by carbon explains this difference. The technique of separation of diffusion and capacitance currents was applied in a kinetic analysis, but it was shown to be inappropriate. We suggest the inapplicability of classic CV theory to the intercalation system accompanied by phase transition. Instead, a model of ohmic resistance determination of process kinetics was considered. LFPC-SS sample delivers three times larger capacity in LiNO3, amounting to 74 mAh g−1 at 1 mV s−1.",
journal = "Journal of Alloys and Compounds",
title = "The influence of synthesis conditions on the redox behaviour of LiFePO4 in aqueous solution",
volume = "776",
pages = "475-485",
doi = "10.1016/j.jallcom.2018.10.246"
}

Georgijević, R., Vujković, M., Gutić, S. J., Aliefendić, M., Jugović, D., Mitrić, M., Đokić, V. R.,& Mentus, S. V.. (2019). The influence of synthesis conditions on the redox behaviour of LiFePO4 in aqueous solution. in Journal of Alloys and Compounds, 776, 475-485.
https://doi.org/10.1016/j.jallcom.2018.10.246

Georgijević R, Vujković M, Gutić SJ, Aliefendić M, Jugović D, Mitrić M, Đokić VR, Mentus SV. The influence of synthesis conditions on the redox behaviour of LiFePO4 in aqueous solution. in Journal of Alloys and Compounds. 2019;776:475-485.
doi:10.1016/j.jallcom.2018.10.246 .

Georgijević, Radovan, Vujković, Milica, Gutić, Sanjin J., Aliefendić, Meho, Jugović, Dragana, Mitrić, Miodrag, Đokić, Veljko R., Mentus, Slavko V., "The influence of synthesis conditions on the redox behaviour of LiFePO4 in aqueous solution" in Journal of Alloys and Compounds, 776 (2019):475-485,
https://doi.org/10.1016/j.jallcom.2018.10.246 . .

TY  - JOUR
AU  - Lazarević, Slavica
AU  - Marjanović, Vesna
AU  - Janković-Častvan, Ivona
AU  - Živković, Ljiljana
AU  - Janaćković, Đorđe T.
AU  - Petrović, Rada
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8594
AB  - Natural and acid-activated sepiolites, functionalized by covalent grafting of [3-(2-aminoethylamino) propyl]trimethoxy-silane were used as adsorbents for the removal of an anionic Reactive Orange 16 dye from aqueous solutions. The influence of initial pH (pHi) on the adsorption was first investigated in comparison with the adsorption onto unmodified sepiolites; then the dye removal process by modified samples was subjected to kinetic and equilibrium studies at pHi = 2.0 or 5.0, at different temperatures. Results showed that the adsorption of dye was favorable at lower pHi and at higher temperatures, in terms of adsorption capacity and rate of adsorption. The binding sites on the adsorbents surfaces were considered to be protonated amine groups, which play a role in the electrostatic interactions with the dye anions at pHi = 2.0. Formation of hydrogen bonds between hydrogen from amine groups and oxygen from the dye and van der Waals forces were proposed as the mechanisms of adsorption at pHi = 5.0. The adsorption kinetics was well fitted to the pseudo-second- order kinetic model, while the equilibrium adsorption data were well correlated with the Sips isotherm. The adsorption capacity of both modified sepiolites was much higher than of the parent samples, whereas the capacity of the functionalized acid-activated sepiolite was higher (~172 mg/g) than of the functionalized natural sepiolite (~158 mg/g) at 298 K, pHi 5.0.
T2  - Desalination and Water Treatment
T1  - Effective removal of Reactive Orange 16 dye from aqueous solution by amine-functionalized sepiolites
VL  - 163
SP  - 376
EP  - 384
DO  - 10.5004/dwt.2019.24437
ER  - 

@article{
author = "Lazarević, Slavica and Marjanović, Vesna and Janković-Častvan, Ivona and Živković, Ljiljana and Janaćković, Đorđe T. and Petrović, Rada",
year = "2019",
abstract = "Natural and acid-activated sepiolites, functionalized by covalent grafting of [3-(2-aminoethylamino) propyl]trimethoxy-silane were used as adsorbents for the removal of an anionic Reactive Orange 16 dye from aqueous solutions. The influence of initial pH (pHi) on the adsorption was first investigated in comparison with the adsorption onto unmodified sepiolites; then the dye removal process by modified samples was subjected to kinetic and equilibrium studies at pHi = 2.0 or 5.0, at different temperatures. Results showed that the adsorption of dye was favorable at lower pHi and at higher temperatures, in terms of adsorption capacity and rate of adsorption. The binding sites on the adsorbents surfaces were considered to be protonated amine groups, which play a role in the electrostatic interactions with the dye anions at pHi = 2.0. Formation of hydrogen bonds between hydrogen from amine groups and oxygen from the dye and van der Waals forces were proposed as the mechanisms of adsorption at pHi = 5.0. The adsorption kinetics was well fitted to the pseudo-second- order kinetic model, while the equilibrium adsorption data were well correlated with the Sips isotherm. The adsorption capacity of both modified sepiolites was much higher than of the parent samples, whereas the capacity of the functionalized acid-activated sepiolite was higher (~172 mg/g) than of the functionalized natural sepiolite (~158 mg/g) at 298 K, pHi 5.0.",
journal = "Desalination and Water Treatment",
title = "Effective removal of Reactive Orange 16 dye from aqueous solution by amine-functionalized sepiolites",
volume = "163",
pages = "376-384",
doi = "10.5004/dwt.2019.24437"
}

Lazarević, S., Marjanović, V., Janković-Častvan, I., Živković, L., Janaćković, Đ. T.,& Petrović, R.. (2019). Effective removal of Reactive Orange 16 dye from aqueous solution by amine-functionalized sepiolites. in Desalination and Water Treatment, 163, 376-384.
https://doi.org/10.5004/dwt.2019.24437

Lazarević S, Marjanović V, Janković-Častvan I, Živković L, Janaćković ĐT, Petrović R. Effective removal of Reactive Orange 16 dye from aqueous solution by amine-functionalized sepiolites. in Desalination and Water Treatment. 2019;163:376-384.
doi:10.5004/dwt.2019.24437 .

Lazarević, Slavica, Marjanović, Vesna, Janković-Častvan, Ivona, Živković, Ljiljana, Janaćković, Đorđe T., Petrović, Rada, "Effective removal of Reactive Orange 16 dye from aqueous solution by amine-functionalized sepiolites" in Desalination and Water Treatment, 163 (2019):376-384,
https://doi.org/10.5004/dwt.2019.24437 . .

TY  - JOUR
AU  - Tomić, Miloš
AU  - Dunjić, Branko
AU  - Nikolić, Marija S.
AU  - Trifković, Kata
AU  - Stanković, Nadežda
AU  - Pavlović, Vladimir B.
AU  - Bajat, Jelena B.
AU  - Đonlagić, Jasna A.
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0300944018312487
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8076
AB  - In the present study the commercial multifunctional fatty acid polyamidoamine (PAA) was for the first time simultaneously applied as a curing agent and clay modifier for epoxy/clay nanocomposites (NC) based on diglycidyl ether of bisphenol A. The montmorillonite (Cloisite®Na + ) was modified with different quantities of partially and fully protonated polyamidoamine. The NCs with 0.5 wt% novel organoclay were prepared by solution intercalation method. The major aims of this paper are investigations of the effects of the composition of PAA modified clays on structure, mechanical, barrier properties and corrosion stability on steel substrates of NCs were studied. The thermogravimetric, flame photometry and X-ray diffraction analyses confirmed the efficient modification of clay surface with polyamidoamine, predominantly located within layers. The NCs exhibited an intercalated/exfoliated morphology and the presence of free amino groups and increased content of modifier facilitated dispersion of clay particles within the polymer matrix, as shown by electron microscopy techniques (SEM, TEM). Under an optimized loading of PAA (molar quantity of total amino groups per clay cation exchange capacity of 1.75), the layers in stacks were separated by 5.0 nm and high number of individual layers was present in NC. Clay modified by PAA with free amino groups showed increased storage modulus in the rubbery state, glass transition temperature of NCs, while dumping factor was decreased. The tensile test confirmed that introduction of flexible modifier on the epoxy/clay interface lead to increase in the ultimate tensile strenght and elongation at break by 31% and toughness up to 83%. The electrochemical impedance spectroscopy and permeability tests proved the pronounced barrier effect of clay particles against corrosive species and water vapor when high dispersion degree of clay in NC was achieved. © 2019 Elsevier B.V.
T2  - Progress in Organic Coatings
T1  - Polyamidoamine as a clay modifier and curing agent in preparation of epoxy nanocomposites
VL  - 131
SP  - 311
EP  - 321
DO  - 10.1016/j.porgcoat.2019.02.037
ER  - 

@article{
author = "Tomić, Miloš and Dunjić, Branko and Nikolić, Marija S. and Trifković, Kata and Stanković, Nadežda and Pavlović, Vladimir B. and Bajat, Jelena B. and Đonlagić, Jasna A.",
year = "2019",
abstract = "In the present study the commercial multifunctional fatty acid polyamidoamine (PAA) was for the first time simultaneously applied as a curing agent and clay modifier for epoxy/clay nanocomposites (NC) based on diglycidyl ether of bisphenol A. The montmorillonite (Cloisite®Na + ) was modified with different quantities of partially and fully protonated polyamidoamine. The NCs with 0.5 wt% novel organoclay were prepared by solution intercalation method. The major aims of this paper are investigations of the effects of the composition of PAA modified clays on structure, mechanical, barrier properties and corrosion stability on steel substrates of NCs were studied. The thermogravimetric, flame photometry and X-ray diffraction analyses confirmed the efficient modification of clay surface with polyamidoamine, predominantly located within layers. The NCs exhibited an intercalated/exfoliated morphology and the presence of free amino groups and increased content of modifier facilitated dispersion of clay particles within the polymer matrix, as shown by electron microscopy techniques (SEM, TEM). Under an optimized loading of PAA (molar quantity of total amino groups per clay cation exchange capacity of 1.75), the layers in stacks were separated by 5.0 nm and high number of individual layers was present in NC. Clay modified by PAA with free amino groups showed increased storage modulus in the rubbery state, glass transition temperature of NCs, while dumping factor was decreased. The tensile test confirmed that introduction of flexible modifier on the epoxy/clay interface lead to increase in the ultimate tensile strenght and elongation at break by 31% and toughness up to 83%. The electrochemical impedance spectroscopy and permeability tests proved the pronounced barrier effect of clay particles against corrosive species and water vapor when high dispersion degree of clay in NC was achieved. © 2019 Elsevier B.V.",
journal = "Progress in Organic Coatings",
title = "Polyamidoamine as a clay modifier and curing agent in preparation of epoxy nanocomposites",
volume = "131",
pages = "311-321",
doi = "10.1016/j.porgcoat.2019.02.037"
}

Tomić, M., Dunjić, B., Nikolić, M. S., Trifković, K., Stanković, N., Pavlović, V. B., Bajat, J. B.,& Đonlagić, J. A.. (2019). Polyamidoamine as a clay modifier and curing agent in preparation of epoxy nanocomposites. in Progress in Organic Coatings, 131, 311-321.
https://doi.org/10.1016/j.porgcoat.2019.02.037

Tomić M, Dunjić B, Nikolić MS, Trifković K, Stanković N, Pavlović VB, Bajat JB, Đonlagić JA. Polyamidoamine as a clay modifier and curing agent in preparation of epoxy nanocomposites. in Progress in Organic Coatings. 2019;131:311-321.
doi:10.1016/j.porgcoat.2019.02.037 .

Tomić, Miloš, Dunjić, Branko, Nikolić, Marija S., Trifković, Kata, Stanković, Nadežda, Pavlović, Vladimir B., Bajat, Jelena B., Đonlagić, Jasna A., "Polyamidoamine as a clay modifier and curing agent in preparation of epoxy nanocomposites" in Progress in Organic Coatings, 131 (2019):311-321,
https://doi.org/10.1016/j.porgcoat.2019.02.037 . .

TY  - JOUR
AU  - Nešović, Katarina
AU  - Janković, Ana
AU  - Perić-Grujić, Aleksandra A.
AU  - Vukašinović-Sekulić, Maja
AU  - Radetić, Tamara
AU  - Živković, Ljiljana
AU  - Park, Soo Jin
AU  - Rhee, Kyong Yop
AU  - Mišković-Stanković, Vesna
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8170
AB  - Silver nanoparticles (AgNPs) were synthesized by in situ electrochemical reduction of Ag+ ions in poly(vinyl alcohol)/chitosan/graphene (PVA/CHI/Gr) hydrogel matrices with different concentrations of chitosan. The physicochemical properties of nanocomposite hydrogels were investigated by UV–vis spectroscopy (UV–vis), dynamic light scattering (DLS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM) and Fourier-transform infrared spectroscopy (FT-IR), thermal characteristics were determined by differential scanning calorimetry (DSC) and mechanical properties were measured by tensile test. The swelling studies were carried out in phosphate buffer to simulate natural physiological environment and data were fitted by several kinetic models to determine the diffusion mechanism and diffusion coefficients of the swelling medium through the hydrogel matrices. It was shown that the presence of silver nanoparticles increased the uptake capability and equilibrium swelling degree of the composite hydrogels. The antibacterial activity was confirmed against Escherichia coli and Staphylococcus aureus, while the hydrogels without AgNPs exhibited antibacterial properties due to the presence of chitosan. With the addition of AgNPs, the samples showed stronger activity and fast reduction in the number of colonies, confirming the synergistic effect of chitosan and AgNPs on the antibacterial activity. © 2019
T2  - Journal of Industrial and Engineering Chemistry
T1  - Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels
VL  - 77
SP  - 83
EP  - 96
DO  - 10.1016/j.jiec.2019.04.022
ER  - 

@article{
author = "Nešović, Katarina and Janković, Ana and Perić-Grujić, Aleksandra A. and Vukašinović-Sekulić, Maja and Radetić, Tamara and Živković, Ljiljana and Park, Soo Jin and Rhee, Kyong Yop and Mišković-Stanković, Vesna",
year = "2019",
abstract = "Silver nanoparticles (AgNPs) were synthesized by in situ electrochemical reduction of Ag+ ions in poly(vinyl alcohol)/chitosan/graphene (PVA/CHI/Gr) hydrogel matrices with different concentrations of chitosan. The physicochemical properties of nanocomposite hydrogels were investigated by UV–vis spectroscopy (UV–vis), dynamic light scattering (DLS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM) and Fourier-transform infrared spectroscopy (FT-IR), thermal characteristics were determined by differential scanning calorimetry (DSC) and mechanical properties were measured by tensile test. The swelling studies were carried out in phosphate buffer to simulate natural physiological environment and data were fitted by several kinetic models to determine the diffusion mechanism and diffusion coefficients of the swelling medium through the hydrogel matrices. It was shown that the presence of silver nanoparticles increased the uptake capability and equilibrium swelling degree of the composite hydrogels. The antibacterial activity was confirmed against Escherichia coli and Staphylococcus aureus, while the hydrogels without AgNPs exhibited antibacterial properties due to the presence of chitosan. With the addition of AgNPs, the samples showed stronger activity and fast reduction in the number of colonies, confirming the synergistic effect of chitosan and AgNPs on the antibacterial activity. © 2019",
journal = "Journal of Industrial and Engineering Chemistry",
title = "Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels",
volume = "77",
pages = "83-96",
doi = "10.1016/j.jiec.2019.04.022"
}

Nešović, K., Janković, A., Perić-Grujić, A. A., Vukašinović-Sekulić, M., Radetić, T., Živković, L., Park, S. J., Rhee, K. Y.,& Mišković-Stanković, V.. (2019). Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels. in Journal of Industrial and Engineering Chemistry, 77, 83-96.
https://doi.org/10.1016/j.jiec.2019.04.022

Nešović K, Janković A, Perić-Grujić AA, Vukašinović-Sekulić M, Radetić T, Živković L, Park SJ, Rhee KY, Mišković-Stanković V. Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels. in Journal of Industrial and Engineering Chemistry. 2019;77:83-96.
doi:10.1016/j.jiec.2019.04.022 .

Nešović, Katarina, Janković, Ana, Perić-Grujić, Aleksandra A., Vukašinović-Sekulić, Maja, Radetić, Tamara, Živković, Ljiljana, Park, Soo Jin, Rhee, Kyong Yop, Mišković-Stanković, Vesna, "Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels" in Journal of Industrial and Engineering Chemistry, 77 (2019):83-96,
https://doi.org/10.1016/j.jiec.2019.04.022 . .

TY  - JOUR
AU  - Nešović, Katarina
AU  - Janković, Ana
AU  - Perić-Grujić, Aleksandra A.
AU  - Vukašinović-Sekulić, Maja
AU  - Radetić, Tamara
AU  - Živković, Ljiljana
AU  - Park, Soo Jin
AU  - Rhee, Kyong Yop
AU  - Mišković-Stanković, Vesna
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8189
AB  - Silver nanoparticles (AgNPs) were synthesized by in situ electrochemical reduction of Ag+ ions in poly(vinyl alcohol)/chitosan/graphene (PVA/CHI/Gr) hydrogel matrices with different concentrations of chitosan. The physicochemical properties of nanocomposite hydrogels were investigated by UV–vis spectroscopy (UV–vis), dynamic light scattering (DLS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM) and Fourier-transform infrared spectroscopy (FT-IR), thermal characteristics were determined by differential scanning calorimetry (DSC) and mechanical properties were measured by tensile test. The swelling studies were carried out in phosphate buffer to simulate natural physiological environment and data were fitted by several kinetic models to determine the diffusion mechanism and diffusion coefficients of the swelling medium through the hydrogel matrices. It was shown that the presence of silver nanoparticles increased the uptake capability and equilibrium swelling degree of the composite hydrogels. The antibacterial activity was confirmed against Escherichia coli and Staphylococcus aureus, while the hydrogels without AgNPs exhibited antibacterial properties due to the presence of chitosan. With the addition of AgNPs, the samples showed stronger activity and fast reduction in the number of colonies, confirming the synergistic effect of chitosan and AgNPs on the antibacterial activity. © 2019
T2  - Journal of Industrial and Engineering Chemistry
T1  - Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels
VL  - 77
SP  - 83
EP  - 96
DO  - 10.1016/j.jiec.2019.04.022
ER  - 

@article{
author = "Nešović, Katarina and Janković, Ana and Perić-Grujić, Aleksandra A. and Vukašinović-Sekulić, Maja and Radetić, Tamara and Živković, Ljiljana and Park, Soo Jin and Rhee, Kyong Yop and Mišković-Stanković, Vesna",
year = "2019",
abstract = "Silver nanoparticles (AgNPs) were synthesized by in situ electrochemical reduction of Ag+ ions in poly(vinyl alcohol)/chitosan/graphene (PVA/CHI/Gr) hydrogel matrices with different concentrations of chitosan. The physicochemical properties of nanocomposite hydrogels were investigated by UV–vis spectroscopy (UV–vis), dynamic light scattering (DLS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM) and Fourier-transform infrared spectroscopy (FT-IR), thermal characteristics were determined by differential scanning calorimetry (DSC) and mechanical properties were measured by tensile test. The swelling studies were carried out in phosphate buffer to simulate natural physiological environment and data were fitted by several kinetic models to determine the diffusion mechanism and diffusion coefficients of the swelling medium through the hydrogel matrices. It was shown that the presence of silver nanoparticles increased the uptake capability and equilibrium swelling degree of the composite hydrogels. The antibacterial activity was confirmed against Escherichia coli and Staphylococcus aureus, while the hydrogels without AgNPs exhibited antibacterial properties due to the presence of chitosan. With the addition of AgNPs, the samples showed stronger activity and fast reduction in the number of colonies, confirming the synergistic effect of chitosan and AgNPs on the antibacterial activity. © 2019",
journal = "Journal of Industrial and Engineering Chemistry",
title = "Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels",
volume = "77",
pages = "83-96",
doi = "10.1016/j.jiec.2019.04.022"
}

Nešović, K., Janković, A., Perić-Grujić, A. A., Vukašinović-Sekulić, M., Radetić, T., Živković, L., Park, S. J., Rhee, K. Y.,& Mišković-Stanković, V.. (2019). Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels. in Journal of Industrial and Engineering Chemistry, 77, 83-96.
https://doi.org/10.1016/j.jiec.2019.04.022

Nešović K, Janković A, Perić-Grujić AA, Vukašinović-Sekulić M, Radetić T, Živković L, Park SJ, Rhee KY, Mišković-Stanković V. Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels. in Journal of Industrial and Engineering Chemistry. 2019;77:83-96.
doi:10.1016/j.jiec.2019.04.022 .

Nešović, Katarina, Janković, Ana, Perić-Grujić, Aleksandra A., Vukašinović-Sekulić, Maja, Radetić, Tamara, Živković, Ljiljana, Park, Soo Jin, Rhee, Kyong Yop, Mišković-Stanković, Vesna, "Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels" in Journal of Industrial and Engineering Chemistry, 77 (2019):83-96,
https://doi.org/10.1016/j.jiec.2019.04.022 . .

TY  - JOUR
AU  - Živković, Ljiljana
AU  - Jegdić, Bore V.
AU  - Andrić, Velibor
AU  - Rhee, Kyong Yop
AU  - Bajat, Jelena B.
AU  - Mišković-Stanković, Vesna
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8422
AB  - In this work an attempt was made to produce epoxy coating doped with ceria (CeO2) and/or zirconia (ZrO2) nanoparticles, in single step electrophoretric deposition process. Deposition was carried out on AA6060 cataforetically from epoxy resin suspension containing synthesized stable aqueous colloidal dispersions (sols) of CeO2 and ZrO2. The influence of ceria and zirconia nanoparticles on the physicochemical characteristics of epoxy coatings was evaluated by energy dispersive X-ray fluorescence spectroscopy, X-ray photoelectron spectroscopy, field-emission scanning electron microscopy, Fourier-transform infrared spectroscopy, thermogravimetric analysis and adhesion measurements, while their corrosion stability during immersion in 0.5 M NaCl solution was monitored by electrochemical impedance spectroscopy. All ceria and/or zirconia containing coatings showed better corrosion stability and adhesion than pure epoxy coating, while between doped epoxy coatings one with CeO2/ZrO2 exhhibited the greatest values of charge-transfer resistance due to synergetic effect of both types of added nanoparticles. © 2019 Elsevier B.V.
T2  - Progress in Organic Coatings
T1  - The effect of ceria and zirconia nanoparticles on the corrosion behaviour of cataphoretic epoxy coatings on AA6060 alloy
VL  - 136
SP  - 105219
DO  - 10.1016/j.porgcoat.2019.105219
ER  - 

@article{
author = "Živković, Ljiljana and Jegdić, Bore V. and Andrić, Velibor and Rhee, Kyong Yop and Bajat, Jelena B. and Mišković-Stanković, Vesna",
year = "2019",
abstract = "In this work an attempt was made to produce epoxy coating doped with ceria (CeO2) and/or zirconia (ZrO2) nanoparticles, in single step electrophoretric deposition process. Deposition was carried out on AA6060 cataforetically from epoxy resin suspension containing synthesized stable aqueous colloidal dispersions (sols) of CeO2 and ZrO2. The influence of ceria and zirconia nanoparticles on the physicochemical characteristics of epoxy coatings was evaluated by energy dispersive X-ray fluorescence spectroscopy, X-ray photoelectron spectroscopy, field-emission scanning electron microscopy, Fourier-transform infrared spectroscopy, thermogravimetric analysis and adhesion measurements, while their corrosion stability during immersion in 0.5 M NaCl solution was monitored by electrochemical impedance spectroscopy. All ceria and/or zirconia containing coatings showed better corrosion stability and adhesion than pure epoxy coating, while between doped epoxy coatings one with CeO2/ZrO2 exhhibited the greatest values of charge-transfer resistance due to synergetic effect of both types of added nanoparticles. © 2019 Elsevier B.V.",
journal = "Progress in Organic Coatings",
title = "The effect of ceria and zirconia nanoparticles on the corrosion behaviour of cataphoretic epoxy coatings on AA6060 alloy",
volume = "136",
pages = "105219",
doi = "10.1016/j.porgcoat.2019.105219"
}

Živković, L., Jegdić, B. V., Andrić, V., Rhee, K. Y., Bajat, J. B.,& Mišković-Stanković, V.. (2019). The effect of ceria and zirconia nanoparticles on the corrosion behaviour of cataphoretic epoxy coatings on AA6060 alloy. in Progress in Organic Coatings, 136, 105219.
https://doi.org/10.1016/j.porgcoat.2019.105219

Živković L, Jegdić BV, Andrić V, Rhee KY, Bajat JB, Mišković-Stanković V. The effect of ceria and zirconia nanoparticles on the corrosion behaviour of cataphoretic epoxy coatings on AA6060 alloy. in Progress in Organic Coatings. 2019;136:105219.
doi:10.1016/j.porgcoat.2019.105219 .

Živković, Ljiljana, Jegdić, Bore V., Andrić, Velibor, Rhee, Kyong Yop, Bajat, Jelena B., Mišković-Stanković, Vesna, "The effect of ceria and zirconia nanoparticles on the corrosion behaviour of cataphoretic epoxy coatings on AA6060 alloy" in Progress in Organic Coatings, 136 (2019):105219,
https://doi.org/10.1016/j.porgcoat.2019.105219 . .

TY  - JOUR
AU  - Nešović, Katarina
AU  - Janković, Ana
AU  - Radetić, Tamara
AU  - Vukašinović-Sekulić, Maja
AU  - Kojić, Vesna V.
AU  - Živković, Ljiljana
AU  - Perić-Grujić, Aleksandra A.
AU  - Rhee, Kyong Yop
AU  - Mišković-Stanković, Vesna
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8531
AB  - In this work, we provide a facile path for the preparation of wound dressing materials with improved characteristics based on biocompatible chitosan and poly(vinyl alcohol) hydrogels with embedded silver nanoparticles (AgNPs) as a potent antimicrobial agent. The hydrogels were prepared via freezing-thawing method, whereas AgNPs were synthesized via an in situ electrochemical route. The excellent physicochemical properties of the obtained nanocomposite hydrogels were validated using different spectroscopic and microscopic techniques. The formation of sub-10 nm AgNPs was confirmed by UV–visible spectroscopy, dynamic light scattering and transmission electron microscopy. Swelling and silver release profiles were validated using several diffusion models. The hydrogels were proven to be non-cytotoxic using MTT test and possessed powerful antibacterial activity against Staphylococcus aureus and Escherichia coli, as determined by test in suspension, which affirmed their feasibility for wound dressing applications. © 2019 Elsevier Ltd
T2  - European Polymer Journal
T1  - Chitosan-based hydrogel wound dressings with electrochemically incorporated silver nanoparticles – In vitro study
VL  - 121
SP  - 109257
DO  - 10.1016/j.eurpolymj.2019.109257
ER  - 

@article{
author = "Nešović, Katarina and Janković, Ana and Radetić, Tamara and Vukašinović-Sekulić, Maja and Kojić, Vesna V. and Živković, Ljiljana and Perić-Grujić, Aleksandra A. and Rhee, Kyong Yop and Mišković-Stanković, Vesna",
year = "2019",
abstract = "In this work, we provide a facile path for the preparation of wound dressing materials with improved characteristics based on biocompatible chitosan and poly(vinyl alcohol) hydrogels with embedded silver nanoparticles (AgNPs) as a potent antimicrobial agent. The hydrogels were prepared via freezing-thawing method, whereas AgNPs were synthesized via an in situ electrochemical route. The excellent physicochemical properties of the obtained nanocomposite hydrogels were validated using different spectroscopic and microscopic techniques. The formation of sub-10 nm AgNPs was confirmed by UV–visible spectroscopy, dynamic light scattering and transmission electron microscopy. Swelling and silver release profiles were validated using several diffusion models. The hydrogels were proven to be non-cytotoxic using MTT test and possessed powerful antibacterial activity against Staphylococcus aureus and Escherichia coli, as determined by test in suspension, which affirmed their feasibility for wound dressing applications. © 2019 Elsevier Ltd",
journal = "European Polymer Journal",
title = "Chitosan-based hydrogel wound dressings with electrochemically incorporated silver nanoparticles – In vitro study",
volume = "121",
pages = "109257",
doi = "10.1016/j.eurpolymj.2019.109257"
}

Nešović, K., Janković, A., Radetić, T., Vukašinović-Sekulić, M., Kojić, V. V., Živković, L., Perić-Grujić, A. A., Rhee, K. Y.,& Mišković-Stanković, V.. (2019). Chitosan-based hydrogel wound dressings with electrochemically incorporated silver nanoparticles – In vitro study. in European Polymer Journal, 121, 109257.
https://doi.org/10.1016/j.eurpolymj.2019.109257

Nešović K, Janković A, Radetić T, Vukašinović-Sekulić M, Kojić VV, Živković L, Perić-Grujić AA, Rhee KY, Mišković-Stanković V. Chitosan-based hydrogel wound dressings with electrochemically incorporated silver nanoparticles – In vitro study. in European Polymer Journal. 2019;121:109257.
doi:10.1016/j.eurpolymj.2019.109257 .

Nešović, Katarina, Janković, Ana, Radetić, Tamara, Vukašinović-Sekulić, Maja, Kojić, Vesna V., Živković, Ljiljana, Perić-Grujić, Aleksandra A., Rhee, Kyong Yop, Mišković-Stanković, Vesna, "Chitosan-based hydrogel wound dressings with electrochemically incorporated silver nanoparticles – In vitro study" in European Polymer Journal, 121 (2019):109257,
https://doi.org/10.1016/j.eurpolymj.2019.109257 . .

TY  - JOUR
AU  - Barjaktarević, Dragana R.
AU  - Đokić, Veljko R.
AU  - Bajat, Jelena B.
AU  - Dimić, Ivana D.
AU  - Cvijović-Alagić, Ivana
AU  - Rakin, Marko P.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8411
AB  - On the surface of the ultrafine-grained Ti–13Nb–13Zr alloy and the coarse-grained Ti–13Nb–13Zr alloy nanotubular oxide layers were formed by electrochemical anodization in the 1 M H3PO4 + NaF electrolyte in order to evaluate the electrochemical behaviour in the artificial saliva. SEM images showed that homogeneous nanotubular oxide layers could be formed by anodic oxidation of titanium alloys in an electrolyte with fluoride ions. These two titanium alloys, like other materials developed to replace the bone tissue in the human body, have to be highly corrosion resistant, which is one of the most common requirement in terms of the biocompatibility, damage and fracture prevention. The alloys were analysed by means of the electrochemical impedance spectroscopy and potentiodynamic polarization. The analyzed alloys had good corrosion stability, while nanotubular oxide layer improved their corrosion resistance. © 2019 Elsevier Ltd
T2  - Theoretical and Applied Fracture Mechanics
T1  - The influence of the surface nanostructured modification on the corrosion resistance of the ultrafine-grained Ti–13Nb–13Zr alloy in artificial saliva
VL  - 103
SP  - 102307
DO  - 10.1016/j.tafmec.2019.102307
ER  - 

@article{
author = "Barjaktarević, Dragana R. and Đokić, Veljko R. and Bajat, Jelena B. and Dimić, Ivana D. and Cvijović-Alagić, Ivana and Rakin, Marko P.",
year = "2019",
abstract = "On the surface of the ultrafine-grained Ti–13Nb–13Zr alloy and the coarse-grained Ti–13Nb–13Zr alloy nanotubular oxide layers were formed by electrochemical anodization in the 1 M H3PO4 + NaF electrolyte in order to evaluate the electrochemical behaviour in the artificial saliva. SEM images showed that homogeneous nanotubular oxide layers could be formed by anodic oxidation of titanium alloys in an electrolyte with fluoride ions. These two titanium alloys, like other materials developed to replace the bone tissue in the human body, have to be highly corrosion resistant, which is one of the most common requirement in terms of the biocompatibility, damage and fracture prevention. The alloys were analysed by means of the electrochemical impedance spectroscopy and potentiodynamic polarization. The analyzed alloys had good corrosion stability, while nanotubular oxide layer improved their corrosion resistance. © 2019 Elsevier Ltd",
journal = "Theoretical and Applied Fracture Mechanics",
title = "The influence of the surface nanostructured modification on the corrosion resistance of the ultrafine-grained Ti–13Nb–13Zr alloy in artificial saliva",
volume = "103",
pages = "102307",
doi = "10.1016/j.tafmec.2019.102307"
}

Barjaktarević, D. R., Đokić, V. R., Bajat, J. B., Dimić, I. D., Cvijović-Alagić, I.,& Rakin, M. P.. (2019). The influence of the surface nanostructured modification on the corrosion resistance of the ultrafine-grained Ti–13Nb–13Zr alloy in artificial saliva. in Theoretical and Applied Fracture Mechanics, 103, 102307.
https://doi.org/10.1016/j.tafmec.2019.102307

Barjaktarević DR, Đokić VR, Bajat JB, Dimić ID, Cvijović-Alagić I, Rakin MP. The influence of the surface nanostructured modification on the corrosion resistance of the ultrafine-grained Ti–13Nb–13Zr alloy in artificial saliva. in Theoretical and Applied Fracture Mechanics. 2019;103:102307.
doi:10.1016/j.tafmec.2019.102307 .

Barjaktarević, Dragana R., Đokić, Veljko R., Bajat, Jelena B., Dimić, Ivana D., Cvijović-Alagić, Ivana, Rakin, Marko P., "The influence of the surface nanostructured modification on the corrosion resistance of the ultrafine-grained Ti–13Nb–13Zr alloy in artificial saliva" in Theoretical and Applied Fracture Mechanics, 103 (2019):102307,
https://doi.org/10.1016/j.tafmec.2019.102307 . .

TY  - JOUR
AU  - Tomić, Miloš
AU  - Dunjić, Branko
AU  - Nikolić, Marija S.
AU  - Maletaškić, Jelena
AU  - Pavlović, Vladimir B.
AU  - Bajat, Jelena B.
AU  - Đonlagić, Jasna A.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1951
AB  - The major aims of this paper are the investigation of the effects of the mixing procedure and the montmorillonite (Mt) surface modification on the structure (optical microscopy, XRD, TEM, SEM), rheological, mechanical properties (DMA, tensile test) and corrosion stability (electrochemical impedance spectroscopy) of clay mineral/epoxy nanocomposite (CPN). Two series of CPN samples were prepared based on diglycidyl ether of bisphenol A (DGEBA) and polyamidoamine curing agent with three organophilic Mt and sodium-montmorillonite (1 wt%). Mt were mixed with DGEBA solution in the powder (direct mixing) and in the form of dispersions, preswollen in a commercial coating thinner (solution intercalation). The commercial Mt (Cloisite 30B) modified by quaternary alkylammonium ions bearing hydroxyl groups and especially Mt functionalized by primary (HDA(+)-Mt) alkylammonium ions, at loadings close to cation exchange capacity (CRC), were significantly swollen by thinner and further uniformly dispersed into CPN. Meanwhile, low gel volumes in thinner were found for more hydrophobic Mt (Cloisite 15A). The compatibility of Mt with solvents was well described by solubility and Flory-Huggins interaction parameters. In contrast to the direct incorporation of Mt powders in CPN, swelling enhanced intercalation of epoxy matrix into Mt, and for HDA(+)-Mt based CPN interlayer spacing reached 4.4 nm. The usage of HDA(+)-Mt organoclay and solution intercalation procedure provided the highest enhancement in rheological parameters (G, G, of Mt/epoxy dispersions and glassy storage modulus, Youngs modulus and barrier properties of cured CPN.
T2  - Applied Clay Science
T1  - Dispersion efficiency of montmorillonites in epoxy nanocomposites using solution intercalation and direct mixing methods
VL  - 154
SP  - 52
EP  - 63
DO  - 10.1016/j.clay.2017.12.047
ER  - 

@article{
author = "Tomić, Miloš and Dunjić, Branko and Nikolić, Marija S. and Maletaškić, Jelena and Pavlović, Vladimir B. and Bajat, Jelena B. and Đonlagić, Jasna A.",
year = "2018",
abstract = "The major aims of this paper are the investigation of the effects of the mixing procedure and the montmorillonite (Mt) surface modification on the structure (optical microscopy, XRD, TEM, SEM), rheological, mechanical properties (DMA, tensile test) and corrosion stability (electrochemical impedance spectroscopy) of clay mineral/epoxy nanocomposite (CPN). Two series of CPN samples were prepared based on diglycidyl ether of bisphenol A (DGEBA) and polyamidoamine curing agent with three organophilic Mt and sodium-montmorillonite (1 wt%). Mt were mixed with DGEBA solution in the powder (direct mixing) and in the form of dispersions, preswollen in a commercial coating thinner (solution intercalation). The commercial Mt (Cloisite 30B) modified by quaternary alkylammonium ions bearing hydroxyl groups and especially Mt functionalized by primary (HDA(+)-Mt) alkylammonium ions, at loadings close to cation exchange capacity (CRC), were significantly swollen by thinner and further uniformly dispersed into CPN. Meanwhile, low gel volumes in thinner were found for more hydrophobic Mt (Cloisite 15A). The compatibility of Mt with solvents was well described by solubility and Flory-Huggins interaction parameters. In contrast to the direct incorporation of Mt powders in CPN, swelling enhanced intercalation of epoxy matrix into Mt, and for HDA(+)-Mt based CPN interlayer spacing reached 4.4 nm. The usage of HDA(+)-Mt organoclay and solution intercalation procedure provided the highest enhancement in rheological parameters (G, G, of Mt/epoxy dispersions and glassy storage modulus, Youngs modulus and barrier properties of cured CPN.",
journal = "Applied Clay Science",
title = "Dispersion efficiency of montmorillonites in epoxy nanocomposites using solution intercalation and direct mixing methods",
volume = "154",
pages = "52-63",
doi = "10.1016/j.clay.2017.12.047"
}

Tomić, M., Dunjić, B., Nikolić, M. S., Maletaškić, J., Pavlović, V. B., Bajat, J. B.,& Đonlagić, J. A.. (2018). Dispersion efficiency of montmorillonites in epoxy nanocomposites using solution intercalation and direct mixing methods. in Applied Clay Science, 154, 52-63.
https://doi.org/10.1016/j.clay.2017.12.047

Tomić M, Dunjić B, Nikolić MS, Maletaškić J, Pavlović VB, Bajat JB, Đonlagić JA. Dispersion efficiency of montmorillonites in epoxy nanocomposites using solution intercalation and direct mixing methods. in Applied Clay Science. 2018;154:52-63.
doi:10.1016/j.clay.2017.12.047 .

Tomić, Miloš, Dunjić, Branko, Nikolić, Marija S., Maletaškić, Jelena, Pavlović, Vladimir B., Bajat, Jelena B., Đonlagić, Jasna A., "Dispersion efficiency of montmorillonites in epoxy nanocomposites using solution intercalation and direct mixing methods" in Applied Clay Science, 154 (2018):52-63,
https://doi.org/10.1016/j.clay.2017.12.047 . .

TY  - JOUR
AU  - Malagurski, Ivana
AU  - Lević, Steva
AU  - Mitrić, Miodrag
AU  - Pavlović, Vladimir B.
AU  - Dimitrijević-Branković, Suzana I.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1817
AB  - Two bimetallic (Zn/Cu) alginate based nanocomposites, impregnated with carbonate or phosphate mineral phase, were prepared by a facile procedure. Mineralized samples exhibited different morphologies and properties when compared to the non-mineralized sample. Antimicrobial testing against Escherichia coil, Staphylococcus aureus and Candida albicans showed that mineralized samples are more efficient than non-mineralized in elimination of microorganisms. The results of this study suggest that bimetallic mineralized alginates could be potentially used as affordable, easy to produce antimicrobial materials. (C) 2017 Elsevier By. All rights reserved.
T2  - Materials Letters
T1  - Bimetallic alginate nanocomposites: New antimicrobial biomaterials for biomedical application
VL  - 212
SP  - 32
EP  - 36
DO  - 10.1016/j.matlet.2017.10.046
ER  - 

@article{
author = "Malagurski, Ivana and Lević, Steva and Mitrić, Miodrag and Pavlović, Vladimir B. and Dimitrijević-Branković, Suzana I.",
year = "2018",
abstract = "Two bimetallic (Zn/Cu) alginate based nanocomposites, impregnated with carbonate or phosphate mineral phase, were prepared by a facile procedure. Mineralized samples exhibited different morphologies and properties when compared to the non-mineralized sample. Antimicrobial testing against Escherichia coil, Staphylococcus aureus and Candida albicans showed that mineralized samples are more efficient than non-mineralized in elimination of microorganisms. The results of this study suggest that bimetallic mineralized alginates could be potentially used as affordable, easy to produce antimicrobial materials. (C) 2017 Elsevier By. All rights reserved.",
journal = "Materials Letters",
title = "Bimetallic alginate nanocomposites: New antimicrobial biomaterials for biomedical application",
volume = "212",
pages = "32-36",
doi = "10.1016/j.matlet.2017.10.046"
}

Malagurski, I., Lević, S., Mitrić, M., Pavlović, V. B.,& Dimitrijević-Branković, S. I.. (2018). Bimetallic alginate nanocomposites: New antimicrobial biomaterials for biomedical application. in Materials Letters, 212, 32-36.
https://doi.org/10.1016/j.matlet.2017.10.046

Malagurski I, Lević S, Mitrić M, Pavlović VB, Dimitrijević-Branković SI. Bimetallic alginate nanocomposites: New antimicrobial biomaterials for biomedical application. in Materials Letters. 2018;212:32-36.
doi:10.1016/j.matlet.2017.10.046 .

Malagurski, Ivana, Lević, Steva, Mitrić, Miodrag, Pavlović, Vladimir B., Dimitrijević-Branković, Suzana I., "Bimetallic alginate nanocomposites: New antimicrobial biomaterials for biomedical application" in Materials Letters, 212 (2018):32-36,
https://doi.org/10.1016/j.matlet.2017.10.046 . .

TY  - JOUR
AU  - Karanac, Milica
AU  - Đolić, Maja B.
AU  - Veličković, Zlate S.
AU  - Kapidžić, Ana
AU  - Ivanovski, Valentin N.
AU  - Mitrić, Miodrag
AU  - Marinković, Aleksandar D.
PY  - 2018
UR  - https://linkinghub.elsevier.com/retrieve/pii/S030147971830803X
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7875
AB  - The modification of the fly ash (FA) by magnetite (M) was performed to obtain FAM adsorbent with improved adsorption efficiency for arsenate removal from water. The novel low cost adsorbents are characterized by liquid nitrogen porosimetry (BET), scanning electron microscopy (SEM), X-ray diffraction (XRD), Mössbauer spectroscopy (MB) and Fourier transform infrared (FTIR) spectroscopy. The optimal conditions and key factors influencing the adsorbent synthesis are assessed using the response surface method (RSM). The adsorption experiment was carried out in a batch system by varying the contact time, temperature, pH, and mass of the adsorbent. The adsorption capacity of the FAM adsorbent for As(V), calculated by Langmuir model, was 19.14 mg g−1. The thermodynamic parameters showed spontaneity of adsorption with low endothermic character. The kinetic data followed the pseudo-second-order kinetic model (PSO), and Weber-Morris model indicated intra-particle diffusion as rate limiting step. Alternative to low desorption capability of the FAM was found by five consecutive adsorption/magnetite precipitation processes which gave exhausted layered adsorbent with 65.78 mg g−1 capacity. This research also has shed light on the mechanism of As(V)-ion adsorption, presenting a promising solution for the valorization of a widely abundant industrial waste. © 2018 Elsevier Ltd
T2  - Journal of Environmental Management
T1  - Efficient multistep arsenate removal onto magnetite modified fly ash
VL  - 224
SP  - 263
EP  - 276
DO  - 10.1016/j.jenvman.2018.07.051
ER  - 

@article{
author = "Karanac, Milica and Đolić, Maja B. and Veličković, Zlate S. and Kapidžić, Ana and Ivanovski, Valentin N. and Mitrić, Miodrag and Marinković, Aleksandar D.",
year = "2018",
abstract = "The modification of the fly ash (FA) by magnetite (M) was performed to obtain FAM adsorbent with improved adsorption efficiency for arsenate removal from water. The novel low cost adsorbents are characterized by liquid nitrogen porosimetry (BET), scanning electron microscopy (SEM), X-ray diffraction (XRD), Mössbauer spectroscopy (MB) and Fourier transform infrared (FTIR) spectroscopy. The optimal conditions and key factors influencing the adsorbent synthesis are assessed using the response surface method (RSM). The adsorption experiment was carried out in a batch system by varying the contact time, temperature, pH, and mass of the adsorbent. The adsorption capacity of the FAM adsorbent for As(V), calculated by Langmuir model, was 19.14 mg g−1. The thermodynamic parameters showed spontaneity of adsorption with low endothermic character. The kinetic data followed the pseudo-second-order kinetic model (PSO), and Weber-Morris model indicated intra-particle diffusion as rate limiting step. Alternative to low desorption capability of the FAM was found by five consecutive adsorption/magnetite precipitation processes which gave exhausted layered adsorbent with 65.78 mg g−1 capacity. This research also has shed light on the mechanism of As(V)-ion adsorption, presenting a promising solution for the valorization of a widely abundant industrial waste. © 2018 Elsevier Ltd",
journal = "Journal of Environmental Management",
title = "Efficient multistep arsenate removal onto magnetite modified fly ash",
volume = "224",
pages = "263-276",
doi = "10.1016/j.jenvman.2018.07.051"
}

Karanac, M., Đolić, M. B., Veličković, Z. S., Kapidžić, A., Ivanovski, V. N., Mitrić, M.,& Marinković, A. D.. (2018). Efficient multistep arsenate removal onto magnetite modified fly ash. in Journal of Environmental Management, 224, 263-276.
https://doi.org/10.1016/j.jenvman.2018.07.051

Karanac M, Đolić MB, Veličković ZS, Kapidžić A, Ivanovski VN, Mitrić M, Marinković AD. Efficient multistep arsenate removal onto magnetite modified fly ash. in Journal of Environmental Management. 2018;224:263-276.
doi:10.1016/j.jenvman.2018.07.051 .

Karanac, Milica, Đolić, Maja B., Veličković, Zlate S., Kapidžić, Ana, Ivanovski, Valentin N., Mitrić, Miodrag, Marinković, Aleksandar D., "Efficient multistep arsenate removal onto magnetite modified fly ash" in Journal of Environmental Management, 224 (2018):263-276,
https://doi.org/10.1016/j.jenvman.2018.07.051 . .

TY  - JOUR
AU  - Barjaktarević, Dragana
AU  - Bajat, Jelena
AU  - Cvijović-Alagić, Ivana
AU  - Dimić, Ivana
AU  - Hohenwarter, Anton
AU  - Đokić, Veljko
AU  - Rakin, Marko
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11334
AB  - In order to optimize and enhance the implant material properties, metallic materials may be modified by severe plastic deformation (SPD) procedures. One of the most attracting SPD methods is high-pressure torsion (HPT), which is method where deformation is obtained mainly by simple shear. In the present study ultrafine-grained titanium (UFG cpTi) and ultrafine-grained Ti-13Nb-13Zr (UFG TNZ) alloy were obtained by high pressure torsion (HPT) under a pressure of 4.1 GPa with a rotational speed of 0.2 rpm up to 5 rotations at room temperature. In order to analyse microstructure of materials before and after HPT process, scanning electron microscope (SEM) was used. The aim of this study was to determine the corrosion resistance of titanium and its alloy after HPT process. Electrochemical measurements were performed in artificial saliva with a pH value of 5.5 at 37 degrees C, in order to simulate the oral environment. The materials were analysed by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. All examined materials showed good corrosion resistance, but results indicate that HPT process can improves corrosion resistance.
T2  - Procedia Structural Integrity
T1  - The corrosion resistance in artificial saliva of titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion
VL  - 13
SP  - 1834
EP  - 1839
DO  - 10.1016/j.prostr.2018.12.332
ER  - 

@article{
author = "Barjaktarević, Dragana and Bajat, Jelena and Cvijović-Alagić, Ivana and Dimić, Ivana and Hohenwarter, Anton and Đokić, Veljko and Rakin, Marko",
year = "2018",
abstract = "In order to optimize and enhance the implant material properties, metallic materials may be modified by severe plastic deformation (SPD) procedures. One of the most attracting SPD methods is high-pressure torsion (HPT), which is method where deformation is obtained mainly by simple shear. In the present study ultrafine-grained titanium (UFG cpTi) and ultrafine-grained Ti-13Nb-13Zr (UFG TNZ) alloy were obtained by high pressure torsion (HPT) under a pressure of 4.1 GPa with a rotational speed of 0.2 rpm up to 5 rotations at room temperature. In order to analyse microstructure of materials before and after HPT process, scanning electron microscope (SEM) was used. The aim of this study was to determine the corrosion resistance of titanium and its alloy after HPT process. Electrochemical measurements were performed in artificial saliva with a pH value of 5.5 at 37 degrees C, in order to simulate the oral environment. The materials were analysed by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. All examined materials showed good corrosion resistance, but results indicate that HPT process can improves corrosion resistance.",
journal = "Procedia Structural Integrity",
title = "The corrosion resistance in artificial saliva of titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion",
volume = "13",
pages = "1834-1839",
doi = "10.1016/j.prostr.2018.12.332"
}

Barjaktarević, D., Bajat, J., Cvijović-Alagić, I., Dimić, I., Hohenwarter, A., Đokić, V.,& Rakin, M.. (2018). The corrosion resistance in artificial saliva of titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion. in Procedia Structural Integrity, 13, 1834-1839.
https://doi.org/10.1016/j.prostr.2018.12.332

Barjaktarević D, Bajat J, Cvijović-Alagić I, Dimić I, Hohenwarter A, Đokić V, Rakin M. The corrosion resistance in artificial saliva of titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion. in Procedia Structural Integrity. 2018;13:1834-1839.
doi:10.1016/j.prostr.2018.12.332 .

Barjaktarević, Dragana, Bajat, Jelena, Cvijović-Alagić, Ivana, Dimić, Ivana, Hohenwarter, Anton, Đokić, Veljko, Rakin, Marko, "The corrosion resistance in artificial saliva of titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion" in Procedia Structural Integrity, 13 (2018):1834-1839,
https://doi.org/10.1016/j.prostr.2018.12.332 . .

TY  - JOUR
AU  - Vujančević, Jelena
AU  - Bjelajac, Anđelika
AU  - Ćirković, Jovana
AU  - Pavlović, Vera P.
AU  - Horvath, Endre
AU  - Forro, Laszlo
AU  - Vlahović, Branislav
AU  - Mitrić, Miodrag
AU  - Janaćković, Đorđe T.
AU  - Pavlović, Vladimir B.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7651
AB  - One-dimensional (1D) TiO2 nanotubes perpendicular to the substrate were obtained by electrochemical oxidation of titanium foil in an acid electrolyte. In order to alter the crystallinity and the morphology of films the as-anodized amorphous TiO2 nanotube films were sintered at elevated temperatures. The evolution of the morphology was visualized via scanning electron microscopy (SEM), while the crystalline structure was investigated by Xray diffraction (XRD) and Raman spectroscopy. The chemical composition was studied by Xray photoelectron spectroscopy (XPS). The effects of crystallinity and morphology of TiO2 nanotube (NTs) films on photocatalytic degradation of methyl orange (MO) in an aqueous solution under UV light irradiation were also investigated. The TiO2 nanotubes sintered at 650 degrees C for 30 min had the highest degree of crystallinity and exhibited the best photocatalytic activity among the studied TiO2 nanotube films.
T2  - Science of Sintering
T1  - Structure and photocatalytic properties of sintered TiO2 nanotube arrays
VL  - 50
IS  - 1
SP  - 39
EP  - 50
DO  - 10.2298/SOS1801039V
ER  - 

@article{
author = "Vujančević, Jelena and Bjelajac, Anđelika and Ćirković, Jovana and Pavlović, Vera P. and Horvath, Endre and Forro, Laszlo and Vlahović, Branislav and Mitrić, Miodrag and Janaćković, Đorđe T. and Pavlović, Vladimir B.",
year = "2018",
abstract = "One-dimensional (1D) TiO2 nanotubes perpendicular to the substrate were obtained by electrochemical oxidation of titanium foil in an acid electrolyte. In order to alter the crystallinity and the morphology of films the as-anodized amorphous TiO2 nanotube films were sintered at elevated temperatures. The evolution of the morphology was visualized via scanning electron microscopy (SEM), while the crystalline structure was investigated by Xray diffraction (XRD) and Raman spectroscopy. The chemical composition was studied by Xray photoelectron spectroscopy (XPS). The effects of crystallinity and morphology of TiO2 nanotube (NTs) films on photocatalytic degradation of methyl orange (MO) in an aqueous solution under UV light irradiation were also investigated. The TiO2 nanotubes sintered at 650 degrees C for 30 min had the highest degree of crystallinity and exhibited the best photocatalytic activity among the studied TiO2 nanotube films.",
journal = "Science of Sintering",
title = "Structure and photocatalytic properties of sintered TiO2 nanotube arrays",
volume = "50",
number = "1",
pages = "39-50",
doi = "10.2298/SOS1801039V"
}

Vujančević, J., Bjelajac, A., Ćirković, J., Pavlović, V. P., Horvath, E., Forro, L., Vlahović, B., Mitrić, M., Janaćković, Đ. T.,& Pavlović, V. B.. (2018). Structure and photocatalytic properties of sintered TiO2 nanotube arrays. in Science of Sintering, 50(1), 39-50.
https://doi.org/10.2298/SOS1801039V

Vujančević J, Bjelajac A, Ćirković J, Pavlović VP, Horvath E, Forro L, Vlahović B, Mitrić M, Janaćković ĐT, Pavlović VB. Structure and photocatalytic properties of sintered TiO2 nanotube arrays. in Science of Sintering. 2018;50(1):39-50.
doi:10.2298/SOS1801039V .

Vujančević, Jelena, Bjelajac, Anđelika, Ćirković, Jovana, Pavlović, Vera P., Horvath, Endre, Forro, Laszlo, Vlahović, Branislav, Mitrić, Miodrag, Janaćković, Đorđe T., Pavlović, Vladimir B., "Structure and photocatalytic properties of sintered TiO2 nanotube arrays" in Science of Sintering, 50, no. 1 (2018):39-50,
https://doi.org/10.2298/SOS1801039V . .

TY  - CONF
AU  - Barjaktarević, Dragana R.
AU  - Bajat, Jelena B.
AU  - Cvijović-Alagić, Ivana
AU  - Dimić, Ivana
AU  - Hohenwarter, Anton
AU  - Đokić, Veljko R.
AU  - Rakin, Marko P.
PY  - 2018
UR  - https://linkinghub.elsevier.com/retrieve/pii/S2452321618305730
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8164
AB  - In order to optimize and enhance the implant material properties, metallic materials may be modified by severe plastic deformation (SPD) procedures. One of the most attracting SPD methods is high-pressure torsion (HPT), which is method where deformation is obtained mainly by simple shear. In the present study ultrafine-grained titanium (UFG cpTi) and ultrafine-grained Ti-13Nb-13Zr (UFG TNZ) alloy were obtained by high pressure torsion (HPT) under a pressure of 4.1 GPa with a rotational speed of 0.2 rpm up to 5 rotations at room temperature. In order to analyse microstructure of materials before and after HPT process, scanning electron microscope (SEM) was used. The aim of this study was to determine the corrosion resistance of titanium and its alloy after HPT process. Electrochemical measurements were performed in artificial saliva with a pH value of 5.5 at 37°C, in order to simulate the oral environment. The materials were analysed by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. All examined materials showed good corrosion resistance, but results indicate that HPT process can improves corrosion resistance. © 2018 The Authors.
C3  - Procedia Structural Integrity
T1  - The corrosion resistance in artificial saliva of titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion
VL  - 13
SP  - 1834
EP  - 1839
DO  - 10.1016/j.prostr.2018.12.332
ER  - 

@conference{
author = "Barjaktarević, Dragana R. and Bajat, Jelena B. and Cvijović-Alagić, Ivana and Dimić, Ivana and Hohenwarter, Anton and Đokić, Veljko R. and Rakin, Marko P.",
year = "2018",
abstract = "In order to optimize and enhance the implant material properties, metallic materials may be modified by severe plastic deformation (SPD) procedures. One of the most attracting SPD methods is high-pressure torsion (HPT), which is method where deformation is obtained mainly by simple shear. In the present study ultrafine-grained titanium (UFG cpTi) and ultrafine-grained Ti-13Nb-13Zr (UFG TNZ) alloy were obtained by high pressure torsion (HPT) under a pressure of 4.1 GPa with a rotational speed of 0.2 rpm up to 5 rotations at room temperature. In order to analyse microstructure of materials before and after HPT process, scanning electron microscope (SEM) was used. The aim of this study was to determine the corrosion resistance of titanium and its alloy after HPT process. Electrochemical measurements were performed in artificial saliva with a pH value of 5.5 at 37°C, in order to simulate the oral environment. The materials were analysed by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization. All examined materials showed good corrosion resistance, but results indicate that HPT process can improves corrosion resistance. © 2018 The Authors.",
journal = "Procedia Structural Integrity",
title = "The corrosion resistance in artificial saliva of titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion",
volume = "13",
pages = "1834-1839",
doi = "10.1016/j.prostr.2018.12.332"
}

Barjaktarević, D. R., Bajat, J. B., Cvijović-Alagić, I., Dimić, I., Hohenwarter, A., Đokić, V. R.,& Rakin, M. P.. (2018). The corrosion resistance in artificial saliva of titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion. in Procedia Structural Integrity, 13, 1834-1839.
https://doi.org/10.1016/j.prostr.2018.12.332

Barjaktarević DR, Bajat JB, Cvijović-Alagić I, Dimić I, Hohenwarter A, Đokić VR, Rakin MP. The corrosion resistance in artificial saliva of titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion. in Procedia Structural Integrity. 2018;13:1834-1839.
doi:10.1016/j.prostr.2018.12.332 .

Barjaktarević, Dragana R., Bajat, Jelena B., Cvijović-Alagić, Ivana, Dimić, Ivana, Hohenwarter, Anton, Đokić, Veljko R., Rakin, Marko P., "The corrosion resistance in artificial saliva of titanium and Ti-13Nb-13Zr alloy processed by high pressure torsion" in Procedia Structural Integrity, 13 (2018):1834-1839,
https://doi.org/10.1016/j.prostr.2018.12.332 . .

TY  - JOUR
AU  - Mijailović, Daniel M.
AU  - Vukčević, Marija M.
AU  - Stević, Zoran M.
AU  - Kalijadis, Ana
AU  - Stojanović, Dušica B.
AU  - Panić, Vladimir V.
AU  - Uskoković, Petar S.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1583
AB  - Activated carbons with high specific surface area (even above 2000 m(2) g(-1)) and pronounced microporosity are prepared in two-stage process involving conventional carbonization of waste hemp fibers and subsequent activation by potassium hydroxide. Samples with considerably different surface and intrinsic micro-and mesoporous properties are obtained at different carbonization and activation conditions. The improvements of the capacitive properties are found upon increase in carbonization temperature, since it considerably influenced the specific surface area and the content of surface oxygen groups. Cyclic voltammetry experiments reveal the dependence of specific capacitance on the sweep rate due to the characteristic porous structure of the samples. The highest measured value in 1 M H2SO4 solution is 122 F g(-1). The electrochemical impedance data indicates eight-branch transmission line equivalent electric behavior of activated carbons. (C) 2017 The Electrochemical Society. All rights reserved.
T2  - Journal of the Electrochemical Society
T1  - Supercapacitive Performances of Activated Highly Microporous Natural Carbon Macrofibers
VL  - 164
IS  - 6
SP  - A1061
EP  - A1068
DO  - 10.1149/2.0581706jes
ER  - 

@article{
author = "Mijailović, Daniel M. and Vukčević, Marija M. and Stević, Zoran M. and Kalijadis, Ana and Stojanović, Dušica B. and Panić, Vladimir V. and Uskoković, Petar S.",
year = "2017",
abstract = "Activated carbons with high specific surface area (even above 2000 m(2) g(-1)) and pronounced microporosity are prepared in two-stage process involving conventional carbonization of waste hemp fibers and subsequent activation by potassium hydroxide. Samples with considerably different surface and intrinsic micro-and mesoporous properties are obtained at different carbonization and activation conditions. The improvements of the capacitive properties are found upon increase in carbonization temperature, since it considerably influenced the specific surface area and the content of surface oxygen groups. Cyclic voltammetry experiments reveal the dependence of specific capacitance on the sweep rate due to the characteristic porous structure of the samples. The highest measured value in 1 M H2SO4 solution is 122 F g(-1). The electrochemical impedance data indicates eight-branch transmission line equivalent electric behavior of activated carbons. (C) 2017 The Electrochemical Society. All rights reserved.",
journal = "Journal of the Electrochemical Society",
title = "Supercapacitive Performances of Activated Highly Microporous Natural Carbon Macrofibers",
volume = "164",
number = "6",
pages = "A1061-A1068",
doi = "10.1149/2.0581706jes"
}

Mijailović, D. M., Vukčević, M. M., Stević, Z. M., Kalijadis, A., Stojanović, D. B., Panić, V. V.,& Uskoković, P. S.. (2017). Supercapacitive Performances of Activated Highly Microporous Natural Carbon Macrofibers. in Journal of the Electrochemical Society, 164(6), A1061-A1068.
https://doi.org/10.1149/2.0581706jes

Mijailović DM, Vukčević MM, Stević ZM, Kalijadis A, Stojanović DB, Panić VV, Uskoković PS. Supercapacitive Performances of Activated Highly Microporous Natural Carbon Macrofibers. in Journal of the Electrochemical Society. 2017;164(6):A1061-A1068.
doi:10.1149/2.0581706jes .

Mijailović, Daniel M., Vukčević, Marija M., Stević, Zoran M., Kalijadis, Ana, Stojanović, Dušica B., Panić, Vladimir V., Uskoković, Petar S., "Supercapacitive Performances of Activated Highly Microporous Natural Carbon Macrofibers" in Journal of the Electrochemical Society, 164, no. 6 (2017):A1061-A1068,
https://doi.org/10.1149/2.0581706jes . .