Bjelajac, Anđelika

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  • Bjelajac, Anđelika (12)

Author's Bibliography

Surface optical phonon (SOP) mode in ZnS/Poly (methylmethacrylate) nanocomposites

Ćurčić, Milica; Hadžić, Branka B.; Gilić, Martina; Radojević, Vesna; Bjelajac, Anđelika; Radović, Ivana; Timotijević, Dejan; Romčević, Maja J.; Trajić, Jelena; Romčević, Nebojša Ž.

(2020)

TY  - JOUR
AU  - Ćurčić, Milica
AU  - Hadžić, Branka B.
AU  - Gilić, Martina
AU  - Radojević, Vesna
AU  - Bjelajac, Anđelika
AU  - Radović, Ivana
AU  - Timotijević, Dejan
AU  - Romčević, Maja J.
AU  - Trajić, Jelena
AU  - Romčević, Nebojša Ž.
PY  - 2020
UR  - http://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 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., 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 I, 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, 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 . .
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Structural and morphological characterization of iron-doped sol-gel derived mullite powders

Ilić, Svetlana M.; Babić, Biljana M.; Bjelajac, Anđelika; Stoimenov, Nikolay; Kljajević, Ljiljana M.; Pošarac-Marković, Milica B.; Matović, Branko

(2020)

TY  - JOUR
AU  - Ilić, Svetlana M.
AU  - Babić, Biljana M.
AU  - Bjelajac, Anđelika
AU  - Stoimenov, Nikolay
AU  - Kljajević, Ljiljana M.
AU  - Pošarac-Marković, Milica B.
AU  - Matović, Branko
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8823
AB  - The structural and morphological properties of iron-doped mullite powders are the subject of the present study. The powders of undoped and iron-doped mullite in the composition range of 3–15 wt% Fe2O3 were synthesized by a combination of sol-gel and combustion methods. The excess of water and urea were introduced in reaction solutions to enhance the copolymerization of aluminum and silicon species. The results of structural characterization revealed that the synthesized mullite powders were amorphous of a hybrid type. The specific surface area of the undoped mullite powder was 262 m2 g-1 with a maximum pore radius (dp) of 2 nm classifying it into mesoporous materials. The addition of iron has reduced the specific surface area, while the pore size value remained the same except for the sample with 3 wt% Fe2O3 (SBET = 278 m2 g-1; dp = 3 nm). The presence of iron caused lowering the temperature of liquid phase formation, while present urea combusted providing the increase of the temperature locally that caused the sintering and formation of agglomerates of smaller particles. However, the results of the particle size analysis are not straightforward. The values of mean volume diameter (D[3,4]) indicated that the particle size increased to 6 wt% Fe2O3 (123.6 μm), and then decreased and for the sample with 12 wt% Fe2O3, it was equal to 96.6 μm. Thus, the added iron contributed to the more uniform particle size distribution. The SEM analysis has also shown the coarse powder particles consisted of the coalesced smaller particles. © 2020 Elsevier Ltd and Techna Group S.r.l.
T2  - Ceramics International
T1  - Structural and morphological characterization of iron-doped sol-gel derived mullite powders
VL  - 46
IS  - 9
SP  - 13107
EP  - 13113
DO  - 10.1016/j.ceramint.2020.02.083
ER  - 
@article{
author = "Ilić, Svetlana M. and Babić, Biljana M. and Bjelajac, Anđelika and Stoimenov, Nikolay and Kljajević, Ljiljana M. and Pošarac-Marković, Milica B. and Matović, Branko",
year = "2020",
abstract = "The structural and morphological properties of iron-doped mullite powders are the subject of the present study. The powders of undoped and iron-doped mullite in the composition range of 3–15 wt% Fe2O3 were synthesized by a combination of sol-gel and combustion methods. The excess of water and urea were introduced in reaction solutions to enhance the copolymerization of aluminum and silicon species. The results of structural characterization revealed that the synthesized mullite powders were amorphous of a hybrid type. The specific surface area of the undoped mullite powder was 262 m2 g-1 with a maximum pore radius (dp) of 2 nm classifying it into mesoporous materials. The addition of iron has reduced the specific surface area, while the pore size value remained the same except for the sample with 3 wt% Fe2O3 (SBET = 278 m2 g-1; dp = 3 nm). The presence of iron caused lowering the temperature of liquid phase formation, while present urea combusted providing the increase of the temperature locally that caused the sintering and formation of agglomerates of smaller particles. However, the results of the particle size analysis are not straightforward. The values of mean volume diameter (D[3,4]) indicated that the particle size increased to 6 wt% Fe2O3 (123.6 μm), and then decreased and for the sample with 12 wt% Fe2O3, it was equal to 96.6 μm. Thus, the added iron contributed to the more uniform particle size distribution. The SEM analysis has also shown the coarse powder particles consisted of the coalesced smaller particles. © 2020 Elsevier Ltd and Techna Group S.r.l.",
journal = "Ceramics International",
title = "Structural and morphological characterization of iron-doped sol-gel derived mullite powders",
volume = "46",
number = "9",
pages = "13107-13113",
doi = "10.1016/j.ceramint.2020.02.083"
}
Ilić, S. M., Babić, B. M., Bjelajac, A., Stoimenov, N., Kljajević, L. M., Pošarac-Marković, M. B.,& Matović, B.. (2020). Structural and morphological characterization of iron-doped sol-gel derived mullite powders. in Ceramics International, 46(9), 13107-13113.
https://doi.org/10.1016/j.ceramint.2020.02.083
Ilić SM, Babić BM, Bjelajac A, Stoimenov N, Kljajević LM, Pošarac-Marković MB, Matović B. Structural and morphological characterization of iron-doped sol-gel derived mullite powders. in Ceramics International. 2020;46(9):13107-13113.
doi:10.1016/j.ceramint.2020.02.083 .
Ilić, Svetlana M., Babić, Biljana M., Bjelajac, Anđelika, Stoimenov, Nikolay, Kljajević, Ljiljana M., Pošarac-Marković, Milica B., Matović, Branko, "Structural and morphological characterization of iron-doped sol-gel derived mullite powders" in Ceramics International, 46, no. 9 (2020):13107-13113,
https://doi.org/10.1016/j.ceramint.2020.02.083 . .
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Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping

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.

(2019)

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  - http://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 . .
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Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping

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.

(2019)

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  - http://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 . .
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Doping of TiO2 nanotubes with nitrogen by annealing in ammonia for visible light activation: Influence of pre- and post-annealing in air

Bjelajac, Anđelika; Petrović, Rada; Popović, Maja; Rakočević, Zlatko Lj.; Socol, Gabriel; Mihailescu, Ion N.; Janaćković, Đorđe T.

(2019)

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  - http://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 . .
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Structure and photocatalytic properties of sintered TiO2 nanotube arrays

Vujančević, Jelena; Bjelajac, Anđelika; Ćirković, Jovana; Pavlović, Vera P.; Horvath, Endre; Forro, Laszlo; Vlahović, Branislav; Mitrić, Miodrag; Janaćković, Đorđe T.; Pavlović, Vladimir B.

(2018)

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://www.doiserbia.nb.rs/Article.aspx?ID=0350-820X1801039V
UR  - http://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 . .
5
8
8

Absorption boost of TiO2 nanotubes by doping with N and sensitization with CdS quantum dots

Bjelajac, Anđelika; Đokić, Veljko R.; Petrović, Rada; Bundaleski, Nenad; Socol, Gabriel; Mihailescu, Ion N.; Rakočević, Zlatko Lj.; Janaćković, Đorđe T.

(2017)

TY  - JOUR
AU  - Bjelajac, Anđelika
AU  - Đokić, Veljko R.
AU  - Petrović, Rada
AU  - Bundaleski, Nenad
AU  - Socol, Gabriel
AU  - Mihailescu, Ion N.
AU  - Rakočević, Zlatko Lj.
AU  - Janaćković, Đorđe T.
PY  - 2017
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1786
AB  - A process of obtaining N-doped TiO2 nanotubes sensitized by CdS nanoparticles is presented, including detailed characterizations performed along the synthesis. Transparent TiO2 films consisting of nanotubes, 2.5 mu m long and of similar to 60 nm inner diameter, were obtained after anodization of a titanium film deposited onto FTO glass substrate. N-doping was achieved by annealing of TiO2 film in ammonia. X-ray Photoelectron Spectroscopy measurements showed that nitrogen was substitutionally incorporated in the TiO2 matrix, with the N:Ti concentration ratio of 1:100. The doping changed the optical properties of the material in such a way that the absorption edge was shifted from 380 nm to 507 nm, as observed from diffuse reflectance spectra. The influence of the microwave (MW) irradiation on the synthesized CdS quantum dots and their optical properties was investigated. It was shown that the diameter of CdS nanoparticles was increased due to releasing of S-2-ions from dimethyl sulfoxide (DMSO) as a consequence of the MW treatment. The (N)TiO2 films were then used as substrates for matrix assisted pulsed laser deposition of the CdS quantum dots with DMSO as a matrix. The laser parameters for the deposition were optimized in order to preserve the nanotubular structure open, the latter being an important feature of this type of photoanode. The structure obtained under optimized conditions has an additional absorption edge shift, reaching 603 nm.
T2  - Ceramics International
T1  - Absorption boost of TiO2 nanotubes by doping with N and sensitization with CdS quantum dots
VL  - 43
IS  - 17
SP  - 15040
EP  - 15046
DO  - 10.1016/j.ceramint.2017.08.029
ER  - 
@article{
author = "Bjelajac, Anđelika and Đokić, Veljko R. and Petrović, Rada and Bundaleski, Nenad and Socol, Gabriel and Mihailescu, Ion N. and Rakočević, Zlatko Lj. and Janaćković, Đorđe T.",
year = "2017",
abstract = "A process of obtaining N-doped TiO2 nanotubes sensitized by CdS nanoparticles is presented, including detailed characterizations performed along the synthesis. Transparent TiO2 films consisting of nanotubes, 2.5 mu m long and of similar to 60 nm inner diameter, were obtained after anodization of a titanium film deposited onto FTO glass substrate. N-doping was achieved by annealing of TiO2 film in ammonia. X-ray Photoelectron Spectroscopy measurements showed that nitrogen was substitutionally incorporated in the TiO2 matrix, with the N:Ti concentration ratio of 1:100. The doping changed the optical properties of the material in such a way that the absorption edge was shifted from 380 nm to 507 nm, as observed from diffuse reflectance spectra. The influence of the microwave (MW) irradiation on the synthesized CdS quantum dots and their optical properties was investigated. It was shown that the diameter of CdS nanoparticles was increased due to releasing of S-2-ions from dimethyl sulfoxide (DMSO) as a consequence of the MW treatment. The (N)TiO2 films were then used as substrates for matrix assisted pulsed laser deposition of the CdS quantum dots with DMSO as a matrix. The laser parameters for the deposition were optimized in order to preserve the nanotubular structure open, the latter being an important feature of this type of photoanode. The structure obtained under optimized conditions has an additional absorption edge shift, reaching 603 nm.",
journal = "Ceramics International",
title = "Absorption boost of TiO2 nanotubes by doping with N and sensitization with CdS quantum dots",
volume = "43",
number = "17",
pages = "15040-15046",
doi = "10.1016/j.ceramint.2017.08.029"
}
Bjelajac, A., Đokić, V. R., Petrović, R., Bundaleski, N., Socol, G., Mihailescu, I. N., Rakočević, Z. Lj.,& Janaćković, Đ. T.. (2017). Absorption boost of TiO2 nanotubes by doping with N and sensitization with CdS quantum dots. in Ceramics International, 43(17), 15040-15046.
https://doi.org/10.1016/j.ceramint.2017.08.029
Bjelajac A, Đokić VR, Petrović R, Bundaleski N, Socol G, Mihailescu IN, Rakočević ZL, Janaćković ĐT. Absorption boost of TiO2 nanotubes by doping with N and sensitization with CdS quantum dots. in Ceramics International. 2017;43(17):15040-15046.
doi:10.1016/j.ceramint.2017.08.029 .
Bjelajac, Anđelika, Đokić, Veljko R., Petrović, Rada, Bundaleski, Nenad, Socol, Gabriel, Mihailescu, Ion N., Rakočević, Zlatko Lj., Janaćković, Đorđe T., "Absorption boost of TiO2 nanotubes by doping with N and sensitization with CdS quantum dots" in Ceramics International, 43, no. 17 (2017):15040-15046,
https://doi.org/10.1016/j.ceramint.2017.08.029 . .
10
10
10

Antimicrobial and Photocatalytic Abilities of Ag2CO3 Nano-Rods

Lončarević, Davor; Vukoje, Ivana D.; Dostanic, Jasmina; Bjelajac, Anđelika; Đorđević, Vesna R.; Dimitrijević, Suzana I.; Nedeljković, Jovan

(2017)

TY  - JOUR
AU  - Lončarević, Davor
AU  - Vukoje, Ivana D.
AU  - Dostanic, Jasmina
AU  - Bjelajac, Anđelika
AU  - Đorđević, Vesna R.
AU  - Dimitrijević, Suzana I.
AU  - Nedeljković, Jovan
PY  - 2017
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1499
AB  - The rod-like Ag2CO3 particles (2-4 3 0.3-0.6 mm, length 3 diameter) were synthesized in water by the precipitation reaction between AgNO3 and NaHCO3 in the presence of polyvinylpyrrolidone. The X-ray diffraction analysis revealed the co-existence of monoclinic and hexagonal phases of Ag2CO3, without presence of impurities. The band gap energy of Ag-2 CO3 was found to be 1.4 eV from the diffuse reflectance spectra. Photocatalytic ability of Ag2CO3 was tested using degradation reaction of the organic dye methylene blue over the wide range of concentrations, as well as under long run working conditions in repeated cycles. The photocatalytic mechanism was discussed in terms of the relative energetics of valence and conduction band. Antimicrobial efficiency of Ag-2 CO3 in dark was tested against Gram-negative bacteria E. coli. The Ag2CO3 dispersions in the concentration range 0.1-1.0 mg/mL ensured 100% reduction of bacteria cells. Time-dependent measurements revealed that reduction rates of bacteria cells vary in ascending order with the content of Ag2CO3. On the other hand, the observed reduction rates of bacteria cells do not depend on the concentration of coexisting free Ag+ ions (from 2 to 25 mg/L) present in Ag2CO3 dispersion.
T2  - Chemistryselect
T1  - Antimicrobial and Photocatalytic Abilities of Ag2CO3 Nano-Rods
VL  - 2
IS  - 10
SP  - 2931
EP  - 2938
DO  - 10.1002/slct.201700003
ER  - 
@article{
author = "Lončarević, Davor and Vukoje, Ivana D. and Dostanic, Jasmina and Bjelajac, Anđelika and Đorđević, Vesna R. and Dimitrijević, Suzana I. and Nedeljković, Jovan",
year = "2017",
abstract = "The rod-like Ag2CO3 particles (2-4 3 0.3-0.6 mm, length 3 diameter) were synthesized in water by the precipitation reaction between AgNO3 and NaHCO3 in the presence of polyvinylpyrrolidone. The X-ray diffraction analysis revealed the co-existence of monoclinic and hexagonal phases of Ag2CO3, without presence of impurities. The band gap energy of Ag-2 CO3 was found to be 1.4 eV from the diffuse reflectance spectra. Photocatalytic ability of Ag2CO3 was tested using degradation reaction of the organic dye methylene blue over the wide range of concentrations, as well as under long run working conditions in repeated cycles. The photocatalytic mechanism was discussed in terms of the relative energetics of valence and conduction band. Antimicrobial efficiency of Ag-2 CO3 in dark was tested against Gram-negative bacteria E. coli. The Ag2CO3 dispersions in the concentration range 0.1-1.0 mg/mL ensured 100% reduction of bacteria cells. Time-dependent measurements revealed that reduction rates of bacteria cells vary in ascending order with the content of Ag2CO3. On the other hand, the observed reduction rates of bacteria cells do not depend on the concentration of coexisting free Ag+ ions (from 2 to 25 mg/L) present in Ag2CO3 dispersion.",
journal = "Chemistryselect",
title = "Antimicrobial and Photocatalytic Abilities of Ag2CO3 Nano-Rods",
volume = "2",
number = "10",
pages = "2931-2938",
doi = "10.1002/slct.201700003"
}
Lončarević, D., Vukoje, I. D., Dostanic, J., Bjelajac, A., Đorđević, V. R., Dimitrijević, S. I.,& Nedeljković, J.. (2017). Antimicrobial and Photocatalytic Abilities of Ag2CO3 Nano-Rods. in Chemistryselect, 2(10), 2931-2938.
https://doi.org/10.1002/slct.201700003
Lončarević D, Vukoje ID, Dostanic J, Bjelajac A, Đorđević VR, Dimitrijević SI, Nedeljković J. Antimicrobial and Photocatalytic Abilities of Ag2CO3 Nano-Rods. in Chemistryselect. 2017;2(10):2931-2938.
doi:10.1002/slct.201700003 .
Lončarević, Davor, Vukoje, Ivana D., Dostanic, Jasmina, Bjelajac, Anđelika, Đorđević, Vesna R., Dimitrijević, Suzana I., Nedeljković, Jovan, "Antimicrobial and Photocatalytic Abilities of Ag2CO3 Nano-Rods" in Chemistryselect, 2, no. 10 (2017):2931-2938,
https://doi.org/10.1002/slct.201700003 . .
8
7
8

Visible-light active mesoporous, nanocrystalline N,S-doped and co-doped titania photocatalysts synthesized by non-hydrolytic sol-gel route

Albrbar, Asma Juma; Đokić, Veljko R.; Bjelajac, Anđelika; Kovač, Janez; Ćirković, Jovana; Mitrić, Miodrag; Janaćković, Đorđe T.; Petrović, Rada

(2016)

TY  - JOUR
AU  - Albrbar, Asma Juma
AU  - Đokić, Veljko R.
AU  - Bjelajac, Anđelika
AU  - Kovač, Janez
AU  - Ćirković, Jovana
AU  - Mitrić, Miodrag
AU  - Janaćković, Đorđe T.
AU  - Petrović, Rada
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1261
AB  - Visible-light active mesoporous N,S-doped and co-doped anatase TiO2 powders were synthesized by non-hydrolytic sol-gel route, starting from TiCl4 and Ti((OPr)-Pr-i)(4) dissolved in cyclohexane or dimethyl sulfoxide, later used as a S-doping agent. After drying in an inert atmosphere, the gels were annealed at 500 degrees C for 3 h, in air or ammonia flow, later used for N-doping. The undoped titania powder, obtained by annealing in air of the cyclohexane-based gel, was also annealed in ammonia to deduce which method is more efficient for N-doping: gel or powder annealing. The post-annealing in air after annealing in ammonia was optimized to attain the best photocatalytic activity for dye degradation under simulated visible light. The size of anatase nanocrystals decreased by doping and the specific surface area of the powders increased. The XPS analysis confirmed a successful substitution of Ti4+ by S(4+) and/or S(6+), which caused a very small band-gap narrowing. The gel annealing in ammonia was much more efficient for interstitial nitrogen incorporation in TiO2 lattice than the powder annealing. The annealing in ammonia of the gel synthesized with dimethyl sulfoxide provided the highest visible-light activity owing to high specific surface area, appropriate mesoporosity and high photoabsorption due to efficient N,S co-doping. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
T2  - Ceramics International
T1  - Visible-light active mesoporous, nanocrystalline N,S-doped and co-doped titania photocatalysts synthesized by non-hydrolytic sol-gel route
VL  - 42
IS  - 15
SP  - 16718
EP  - 16728
DO  - 10.1016/j.ceramint.2016.07.144
ER  - 
@article{
author = "Albrbar, Asma Juma and Đokić, Veljko R. and Bjelajac, Anđelika and Kovač, Janez and Ćirković, Jovana and Mitrić, Miodrag and Janaćković, Đorđe T. and Petrović, Rada",
year = "2016",
abstract = "Visible-light active mesoporous N,S-doped and co-doped anatase TiO2 powders were synthesized by non-hydrolytic sol-gel route, starting from TiCl4 and Ti((OPr)-Pr-i)(4) dissolved in cyclohexane or dimethyl sulfoxide, later used as a S-doping agent. After drying in an inert atmosphere, the gels were annealed at 500 degrees C for 3 h, in air or ammonia flow, later used for N-doping. The undoped titania powder, obtained by annealing in air of the cyclohexane-based gel, was also annealed in ammonia to deduce which method is more efficient for N-doping: gel or powder annealing. The post-annealing in air after annealing in ammonia was optimized to attain the best photocatalytic activity for dye degradation under simulated visible light. The size of anatase nanocrystals decreased by doping and the specific surface area of the powders increased. The XPS analysis confirmed a successful substitution of Ti4+ by S(4+) and/or S(6+), which caused a very small band-gap narrowing. The gel annealing in ammonia was much more efficient for interstitial nitrogen incorporation in TiO2 lattice than the powder annealing. The annealing in ammonia of the gel synthesized with dimethyl sulfoxide provided the highest visible-light activity owing to high specific surface area, appropriate mesoporosity and high photoabsorption due to efficient N,S co-doping. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
journal = "Ceramics International",
title = "Visible-light active mesoporous, nanocrystalline N,S-doped and co-doped titania photocatalysts synthesized by non-hydrolytic sol-gel route",
volume = "42",
number = "15",
pages = "16718-16728",
doi = "10.1016/j.ceramint.2016.07.144"
}
Albrbar, A. J., Đokić, V. R., Bjelajac, A., Kovač, J., Ćirković, J., Mitrić, M., Janaćković, Đ. T.,& Petrović, R.. (2016). Visible-light active mesoporous, nanocrystalline N,S-doped and co-doped titania photocatalysts synthesized by non-hydrolytic sol-gel route. in Ceramics International, 42(15), 16718-16728.
https://doi.org/10.1016/j.ceramint.2016.07.144
Albrbar AJ, Đokić VR, Bjelajac A, Kovač J, Ćirković J, Mitrić M, Janaćković ĐT, Petrović R. Visible-light active mesoporous, nanocrystalline N,S-doped and co-doped titania photocatalysts synthesized by non-hydrolytic sol-gel route. in Ceramics International. 2016;42(15):16718-16728.
doi:10.1016/j.ceramint.2016.07.144 .
Albrbar, Asma Juma, Đokić, Veljko R., Bjelajac, Anđelika, Kovač, Janez, Ćirković, Jovana, Mitrić, Miodrag, Janaćković, Đorđe T., Petrović, Rada, "Visible-light active mesoporous, nanocrystalline N,S-doped and co-doped titania photocatalysts synthesized by non-hydrolytic sol-gel route" in Ceramics International, 42, no. 15 (2016):16718-16728,
https://doi.org/10.1016/j.ceramint.2016.07.144 . .
21
20
20

Ex-situ sensitization of ordered TiO2 nanotubes with CdS quantum dots

Bjelajac, Anđelika; Petrović, Rada; Nedeljković, Jovan; Đokić, Veljko R.; Radetic, Tamara; Ćirković, Jovana; Janaćković, Đorđe T.

(2015)

TY  - JOUR
AU  - Bjelajac, Anđelika
AU  - Petrović, Rada
AU  - Nedeljković, Jovan
AU  - Đokić, Veljko R.
AU  - Radetic, Tamara
AU  - Ćirković, Jovana
AU  - Janaćković, Đorđe T.
PY  - 2015
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/506
AB  - Ordered titania nanotubes (pore diameter approximate to 90 nm and wall thickness approximate to 10 nm) were obtained by the anodization technique and used for the ex-situ deposition of cadmium sulfide quantum dots (CdS QDs) via simple immersion of titania substrates in the CdS colloid. The colloidal dispersion of CdS nanoparticles in water was obtained in the presence of the bifunctional ligand, mercapto silane, which binds to the surface of CdS providing stability to the colloid and preventing further growth of the synthesized nanoparticles. The blue-shift of the optical absorption indicated that the CdS nanoparticles were of quantum dot size. Using the effective mass model, the average particle size was calculated to be 5.4 nm. Transmission electron microscopy provided the verification for the estimated size of the nanoparticles, which was followed by performing selected area electron diffraction to determine the mixed phase (cubic and hexagonal) of the synthesized CdS QDs. Scanning electron microscopy and reflectance spectroscopy were employed to characterize the nanostructures consisting of TiO2 nanotubes with different loadings of CdS QDs (after 24 h and 72 h immersion). It was demonstrated that mercapto silane efficiently binds CdS QDs onto TiO2 nanotubes enabling Visible-light response of the obtained nanocomposites. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
T2  - Ceramics International
T1  - Ex-situ sensitization of ordered TiO2 nanotubes with CdS quantum dots
VL  - 41
IS  - 5
SP  - 7048
EP  - 7053
DO  - 10.1016/j.ceramint.2015.02.010
ER  - 
@article{
author = "Bjelajac, Anđelika and Petrović, Rada and Nedeljković, Jovan and Đokić, Veljko R. and Radetic, Tamara and Ćirković, Jovana and Janaćković, Đorđe T.",
year = "2015",
abstract = "Ordered titania nanotubes (pore diameter approximate to 90 nm and wall thickness approximate to 10 nm) were obtained by the anodization technique and used for the ex-situ deposition of cadmium sulfide quantum dots (CdS QDs) via simple immersion of titania substrates in the CdS colloid. The colloidal dispersion of CdS nanoparticles in water was obtained in the presence of the bifunctional ligand, mercapto silane, which binds to the surface of CdS providing stability to the colloid and preventing further growth of the synthesized nanoparticles. The blue-shift of the optical absorption indicated that the CdS nanoparticles were of quantum dot size. Using the effective mass model, the average particle size was calculated to be 5.4 nm. Transmission electron microscopy provided the verification for the estimated size of the nanoparticles, which was followed by performing selected area electron diffraction to determine the mixed phase (cubic and hexagonal) of the synthesized CdS QDs. Scanning electron microscopy and reflectance spectroscopy were employed to characterize the nanostructures consisting of TiO2 nanotubes with different loadings of CdS QDs (after 24 h and 72 h immersion). It was demonstrated that mercapto silane efficiently binds CdS QDs onto TiO2 nanotubes enabling Visible-light response of the obtained nanocomposites. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
journal = "Ceramics International",
title = "Ex-situ sensitization of ordered TiO2 nanotubes with CdS quantum dots",
volume = "41",
number = "5",
pages = "7048-7053",
doi = "10.1016/j.ceramint.2015.02.010"
}
Bjelajac, A., Petrović, R., Nedeljković, J., Đokić, V. R., Radetic, T., Ćirković, J.,& Janaćković, Đ. T.. (2015). Ex-situ sensitization of ordered TiO2 nanotubes with CdS quantum dots. in Ceramics International, 41(5), 7048-7053.
https://doi.org/10.1016/j.ceramint.2015.02.010
Bjelajac A, Petrović R, Nedeljković J, Đokić VR, Radetic T, Ćirković J, Janaćković ĐT. Ex-situ sensitization of ordered TiO2 nanotubes with CdS quantum dots. in Ceramics International. 2015;41(5):7048-7053.
doi:10.1016/j.ceramint.2015.02.010 .
Bjelajac, Anđelika, Petrović, Rada, Nedeljković, Jovan, Đokić, Veljko R., Radetic, Tamara, Ćirković, Jovana, Janaćković, Đorđe T., "Ex-situ sensitization of ordered TiO2 nanotubes with CdS quantum dots" in Ceramics International, 41, no. 5 (2015):7048-7053,
https://doi.org/10.1016/j.ceramint.2015.02.010 . .
5
5
5

Tailoring self-ordering TiO2 nanotube arrays by oxidative anodization

Vujančević, Jelena; Đokić, Veljko R.; Bjelajac, Anđelika; Pavlović, Vera P.; Mitrić, Miodrag; Janaćković, Đorđe T.; Pavlović, Vladimir B.

(Belgrade : Institute of Technical Sciences of SASA, 2015)

TY  - CONF
AU  - Vujančević, Jelena
AU  - Đokić, Veljko R.
AU  - Bjelajac, Anđelika
AU  - Pavlović, Vera P.
AU  - Mitrić, Miodrag
AU  - Janaćković, Đorđe T.
AU  - Pavlović, Vladimir B.
PY  - 2015
UR  - http://dais.sanu.ac.rs/123456789/841
UR  - http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/1121
UR  - http://www.itn.sanu.ac.rs/opus4/files/1121/Vujancevic-14YRC.pdf
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7545
AB  - Having in mind that anodic oxidation method can be used for tailoring desired structure and morphology of TiO2, herein the synthesis of self-ordered TiO2 nanotubes via electrochemical anodization of high purity Ti foil is reported. The influence of synthesis parameters such as oxidative voltage, different electrolyte, annealing temperature and annealing atmosphere were explored and correlate with obtained TiO2 nanotube arrays. The results show that applied potential is the main factor that controls the diameter of the nanotubes, while annealing temperature influence on crystal type and morphology is related to different contents of electrolyte. Investigated method gives opportunity to enhanced performance of TiO2 nanotubes, providing many applications in different field.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Program and the Book of Abstracts / Fourteenth Young Researchers' Conference Materials Sciences and Engineering, December 9-11, 2015, Belgrade, Serbia
T1  - Tailoring self-ordering TiO2 nanotube arrays by oxidative anodization
SP  - 18
EP  - 18
ER  - 
@conference{
author = "Vujančević, Jelena and Đokić, Veljko R. and Bjelajac, Anđelika and Pavlović, Vera P. and Mitrić, Miodrag and Janaćković, Đorđe T. and Pavlović, Vladimir B.",
year = "2015",
abstract = "Having in mind that anodic oxidation method can be used for tailoring desired structure and morphology of TiO2, herein the synthesis of self-ordered TiO2 nanotubes via electrochemical anodization of high purity Ti foil is reported. The influence of synthesis parameters such as oxidative voltage, different electrolyte, annealing temperature and annealing atmosphere were explored and correlate with obtained TiO2 nanotube arrays. The results show that applied potential is the main factor that controls the diameter of the nanotubes, while annealing temperature influence on crystal type and morphology is related to different contents of electrolyte. Investigated method gives opportunity to enhanced performance of TiO2 nanotubes, providing many applications in different field.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Program and the Book of Abstracts / Fourteenth Young Researchers' Conference Materials Sciences and Engineering, December 9-11, 2015, Belgrade, Serbia",
title = "Tailoring self-ordering TiO2 nanotube arrays by oxidative anodization",
pages = "18-18"
}
Vujančević, J., Đokić, V. R., Bjelajac, A., Pavlović, V. P., Mitrić, M., Janaćković, Đ. T.,& Pavlović, V. B.. (2015). Tailoring self-ordering TiO2 nanotube arrays by oxidative anodization. in Program and the Book of Abstracts / Fourteenth Young Researchers' Conference Materials Sciences and Engineering, December 9-11, 2015, Belgrade, Serbia
Belgrade : Institute of Technical Sciences of SASA., 18-18.
Vujančević J, Đokić VR, Bjelajac A, Pavlović VP, Mitrić M, Janaćković ĐT, Pavlović VB. Tailoring self-ordering TiO2 nanotube arrays by oxidative anodization. in Program and the Book of Abstracts / Fourteenth Young Researchers' Conference Materials Sciences and Engineering, December 9-11, 2015, Belgrade, Serbia. 2015;:18-18..
Vujančević, Jelena, Đokić, Veljko R., Bjelajac, Anđelika, Pavlović, Vera P., Mitrić, Miodrag, Janaćković, Đorđe T., Pavlović, Vladimir B., "Tailoring self-ordering TiO2 nanotube arrays by oxidative anodization" in Program and the Book of Abstracts / Fourteenth Young Researchers' Conference Materials Sciences and Engineering, December 9-11, 2015, Belgrade, Serbia (2015):18-18.

Influence of Synthesis Parameters on Structure of 1-D TiO2 nanostructures

Vujančević, Jelena; Bjelajac, Anđelika; Obradović, Nina; Pavlović, Vera P.; Mitrić, Miodrag; Janaćković, Đorđe T.; Rašić, Goran; Vlahović, Branislav; Pavlović, Vladimir B.

(Belgrade : Serbian Ceramic Society, 2015)

TY  - CONF
AU  - Vujančević, Jelena
AU  - Bjelajac, Anđelika
AU  - Obradović, Nina
AU  - Pavlović, Vera P.
AU  - Mitrić, Miodrag
AU  - Janaćković, Đorđe T.
AU  - Rašić, Goran
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir B.
PY  - 2015
UR  - http://dais.sanu.ac.rs/123456789/764
UR  - http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/1038
UR  - http://www.itn.sanu.ac.rs/opus4/files/1038/Vujancevic-ACAIV.pdf
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7527
AB  - The influence of electrochemical conditions and the heat treatment on the crystal structure and the microstructure evolution of TiO2 based nanotubes synthesized by the self-ordering anodization process is investigated in this work. The electrochemical anodization was performed at room temperature, for 30 minutes under 15, 20 and 25 V, with stirring. The as-anodized Ti foils were annealed in air at 450, 600, 650 and 700 °C for 30 minutes. The structure and the lattice dynamics of the samples has been studied by using XRD and Raman spectroscopy methods. The microstructure development of the 1-D TiO2 nanostructures has been analyzed by FESEM.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / IV Serbian Ceramic Society Conference, Belgrade, 21-23. September 2015
T1  - Influence of Synthesis Parameters on Structure of 1-D TiO2 nanostructures
SP  - 81
EP  - 81
ER  - 
@conference{
author = "Vujančević, Jelena and Bjelajac, Anđelika and Obradović, Nina and Pavlović, Vera P. and Mitrić, Miodrag and Janaćković, Đorđe T. and Rašić, Goran and Vlahović, Branislav and Pavlović, Vladimir B.",
year = "2015",
abstract = "The influence of electrochemical conditions and the heat treatment on the crystal structure and the microstructure evolution of TiO2 based nanotubes synthesized by the self-ordering anodization process is investigated in this work. The electrochemical anodization was performed at room temperature, for 30 minutes under 15, 20 and 25 V, with stirring. The as-anodized Ti foils were annealed in air at 450, 600, 650 and 700 °C for 30 minutes. The structure and the lattice dynamics of the samples has been studied by using XRD and Raman spectroscopy methods. The microstructure development of the 1-D TiO2 nanostructures has been analyzed by FESEM.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / IV Serbian Ceramic Society Conference, Belgrade, 21-23. September 2015",
title = "Influence of Synthesis Parameters on Structure of 1-D TiO2 nanostructures",
pages = "81-81"
}
Vujančević, J., Bjelajac, A., Obradović, N., Pavlović, V. P., Mitrić, M., Janaćković, Đ. T., Rašić, G., Vlahović, B.,& Pavlović, V. B.. (2015). Influence of Synthesis Parameters on Structure of 1-D TiO2 nanostructures. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / IV Serbian Ceramic Society Conference, Belgrade, 21-23. September 2015
Belgrade : Serbian Ceramic Society., 81-81.
Vujančević J, Bjelajac A, Obradović N, Pavlović VP, Mitrić M, Janaćković ĐT, Rašić G, Vlahović B, Pavlović VB. Influence of Synthesis Parameters on Structure of 1-D TiO2 nanostructures. in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / IV Serbian Ceramic Society Conference, Belgrade, 21-23. September 2015. 2015;:81-81..
Vujančević, Jelena, Bjelajac, Anđelika, Obradović, Nina, Pavlović, Vera P., Mitrić, Miodrag, Janaćković, Đorđe T., Rašić, Goran, Vlahović, Branislav, Pavlović, Vladimir B., "Influence of Synthesis Parameters on Structure of 1-D TiO2 nanostructures" in Advanced Ceramics and Application : new frontiers in multifunctional material science and processing : program and the book of abstracts / IV Serbian Ceramic Society Conference, Belgrade, 21-23. September 2015 (2015):81-81.