TY  - JOUR
AU  - Vujančević, Jelena
AU  - Bjelajac, Anđelika
AU  - Veltruska, Katerina
AU  - Matolin, Vladimir
AU  - Siketić, Zdravko
AU  - Provatas, Georgios
AU  - Jakšić, Milko
AU  - Stan, George
AU  - Socol, Gabriel
AU  - Mihailescu, Ion
AU  - Pavlović, Vladimir B.
AU  - Janaćkovic, Đorđe
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13160
AB  - Pure Ti films deposited by radio-frequency magnetron sputtering on FTO glass were anodized to fabricate TiO2 nanotubes (NTs) arrays. The TiO2 NTs/FTO samples were sintered at 450, 550 and 630°C, in ambient air. The thermal treatment did not influence the crystal phase composition, preserving in all cases the anatase single phase. As expected, the crystalline anatase quality improved with the annealing temperature. Nevertheless, slight differences in nanotubular morphology, such as the appearance of grains inside the walls, were observed in the case of the sample sintered at 630°C. Chemical analysis by X-ray Photoelectron Spectroscopy of annealed samples revealed the presence of Sn inside TiO2 NTs, due to diffusion of Sn from the substrate to TiO2. For the substrate was used FTO glass whose top layer consists of SnO2 doped with F. Rutherford Backscattering Spectrometry and Time-of-Flight Elastic Recoil Detection Analysis were carried out to study the elemental depth profile of the films. It was found that the temperature of sintering controls the Sn diffusion inside TiO2 film. Sn atoms diffuse towards the TiO2 NTs surface for the samples annealed at 450 and 550°C. The diffusion is however hindered in the case of the heat treatment at 630°C. Besides, the Ti diffusion into the SnO2 underlayer was observed, together with the formation of TiO2/SnO2 interfaces. One then expected but not a great difference in absorption between samples, since all contained anatase phase, as confirmed by Diffuse Reflectance Spectroscopy. A higher amount of Sn was however detected for the sample annealed at 550°C, which accounts for a slight red absorption shift. The importance of controlling the annealing parameters of the anodized TiO2/FTO structures was highlighted through the formation of TiO2-SnO2 interfaces and the Sn insertion from FTO, which can play an essential role in increasing the photoperformances of TiO2 NTs/FTO based structures of photovoltaic cells.
PB  - ETRAN
T2  - Science of Sintering
T1  - TiO2 nanotubes film/FTO glass interface: Thermal treatment effects
SP  - 235
EP  - 248
VL  - 54
IS  - 2
DO  - 10.2298/SOS2202235V
UR  - https://hdl.handle.net/21.15107/rcub_dais_13160
ER  - 

@article{
author = "Vujančević, Jelena and Bjelajac, Anđelika and Veltruska, Katerina and Matolin, Vladimir and Siketić, Zdravko and Provatas, Georgios and Jakšić, Milko and Stan, George and Socol, Gabriel and Mihailescu, Ion and Pavlović, Vladimir B. and Janaćkovic, Đorđe",
year = "2022",
abstract = "Pure Ti films deposited by radio-frequency magnetron sputtering on FTO glass were anodized to fabricate TiO2 nanotubes (NTs) arrays. The TiO2 NTs/FTO samples were sintered at 450, 550 and 630°C, in ambient air. The thermal treatment did not influence the crystal phase composition, preserving in all cases the anatase single phase. As expected, the crystalline anatase quality improved with the annealing temperature. Nevertheless, slight differences in nanotubular morphology, such as the appearance of grains inside the walls, were observed in the case of the sample sintered at 630°C. Chemical analysis by X-ray Photoelectron Spectroscopy of annealed samples revealed the presence of Sn inside TiO2 NTs, due to diffusion of Sn from the substrate to TiO2. For the substrate was used FTO glass whose top layer consists of SnO2 doped with F. Rutherford Backscattering Spectrometry and Time-of-Flight Elastic Recoil Detection Analysis were carried out to study the elemental depth profile of the films. It was found that the temperature of sintering controls the Sn diffusion inside TiO2 film. Sn atoms diffuse towards the TiO2 NTs surface for the samples annealed at 450 and 550°C. The diffusion is however hindered in the case of the heat treatment at 630°C. Besides, the Ti diffusion into the SnO2 underlayer was observed, together with the formation of TiO2/SnO2 interfaces. One then expected but not a great difference in absorption between samples, since all contained anatase phase, as confirmed by Diffuse Reflectance Spectroscopy. A higher amount of Sn was however detected for the sample annealed at 550°C, which accounts for a slight red absorption shift. The importance of controlling the annealing parameters of the anodized TiO2/FTO structures was highlighted through the formation of TiO2-SnO2 interfaces and the Sn insertion from FTO, which can play an essential role in increasing the photoperformances of TiO2 NTs/FTO based structures of photovoltaic cells.",
publisher = "ETRAN",
journal = "Science of Sintering",
title = "TiO2 nanotubes film/FTO glass interface: Thermal treatment effects",
pages = "235-248",
volume = "54",
number = "2",
doi = "10.2298/SOS2202235V",
url = "https://hdl.handle.net/21.15107/rcub_dais_13160"
}

Vujančević, J., Bjelajac, A., Veltruska, K., Matolin, V., Siketić, Z., Provatas, G., Jakšić, M., Stan, G., Socol, G., Mihailescu, I., Pavlović, V. B.,& Janaćkovic, Đ.. (2022). TiO2 nanotubes film/FTO glass interface: Thermal treatment effects. in Science of Sintering
ETRAN., 54(2), 235-248.
https://doi.org/10.2298/SOS2202235V
https://hdl.handle.net/21.15107/rcub_dais_13160

Vujančević J, Bjelajac A, Veltruska K, Matolin V, Siketić Z, Provatas G, Jakšić M, Stan G, Socol G, Mihailescu I, Pavlović VB, Janaćkovic Đ. TiO2 nanotubes film/FTO glass interface: Thermal treatment effects. in Science of Sintering. 2022;54(2):235-248.
doi:10.2298/SOS2202235V
https://hdl.handle.net/21.15107/rcub_dais_13160 .

Vujančević, Jelena, Bjelajac, Anđelika, Veltruska, Katerina, Matolin, Vladimir, Siketić, Zdravko, Provatas, Georgios, Jakšić, Milko, Stan, George, Socol, Gabriel, Mihailescu, Ion, Pavlović, Vladimir B., Janaćkovic, Đorđe, "TiO2 nanotubes film/FTO glass interface: Thermal treatment effects" in Science of Sintering, 54, no. 2 (2022):235-248,
https://doi.org/10.2298/SOS2202235V .,
https://hdl.handle.net/21.15107/rcub_dais_13160 .

TY  - JOUR
AU  - Bjelajac, Anđelika
AU  - Petrović, Rada
AU  - Vujančević, Jelena
AU  - Veltruska, Katerina
AU  - Matolin, Vladimir
AU  - Siketić, Zdravko
AU  - Provatas, George
AU  - Jakšić, Milko
AU  - Stan, George E.
AU  - Socol, Gabriel
AU  - Mihailescu, Ion N.
AU  - Janaćković, Đorđe
PY  - 2020
UR  - http://www.sciencedirect.com/science/article/pii/S0022369719328525
UR  - https://dais.sanu.ac.rs/123456789/9541
AB  - We fabricated Sn-doped TiO2 nanotubular film via annealing of anodized TiO2 nanotubes grown on F–SnO2 (FTO) glass. Annealing was carried out at 500 °C in ambient air. Anatase crystal structure was achieved with no change in nanotubular morphology in respect to as-anodized amorphous TiO2 nanotubes. The X-ray photoelectron spectroscopy analysis revealed Sn on the surface of TiO2 film, following the thermal treatment, probably caused by the diffusion from FTO glass. Depth profile examination of the film chemical composition was conducted by elastic recoil detection analysis, which showed that in addition to the diffusion of Sn from FTO, diffusion of Ti to FTO concurrently occurred. Thus, a higher concentration of Sn was found at the bottom of the tubes, while a lower concentration was present on the tubes’ surface top. This explains the improved optical response revealed by a diffuse reflectance spectroscopy. The absorption enhancement demonstrated that Sn-doped TiO2 film was efficient in the degradation of methyl orange dye under visible light.
PB  - Elsevier
T2  - Journal of Physics and Chemistry of Solids
T1  - Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye
SP  - 109609
VL  - 147
DO  - 10.1016/j.jpcs.2020.109609
UR  - https://hdl.handle.net/21.15107/rcub_dais_9541
ER  - 

@article{
author = "Bjelajac, Anđelika and Petrović, Rada and Vujančević, Jelena and Veltruska, Katerina and Matolin, Vladimir and Siketić, Zdravko and Provatas, George and Jakšić, Milko and Stan, George E. and Socol, Gabriel and Mihailescu, Ion N. and Janaćković, Đorđe",
year = "2020",
abstract = "We fabricated Sn-doped TiO2 nanotubular film via annealing of anodized TiO2 nanotubes grown on F–SnO2 (FTO) glass. Annealing was carried out at 500 °C in ambient air. Anatase crystal structure was achieved with no change in nanotubular morphology in respect to as-anodized amorphous TiO2 nanotubes. The X-ray photoelectron spectroscopy analysis revealed Sn on the surface of TiO2 film, following the thermal treatment, probably caused by the diffusion from FTO glass. Depth profile examination of the film chemical composition was conducted by elastic recoil detection analysis, which showed that in addition to the diffusion of Sn from FTO, diffusion of Ti to FTO concurrently occurred. Thus, a higher concentration of Sn was found at the bottom of the tubes, while a lower concentration was present on the tubes’ surface top. This explains the improved optical response revealed by a diffuse reflectance spectroscopy. The absorption enhancement demonstrated that Sn-doped TiO2 film was efficient in the degradation of methyl orange dye under visible light.",
publisher = "Elsevier",
journal = "Journal of Physics and Chemistry of Solids",
title = "Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye",
pages = "109609",
volume = "147",
doi = "10.1016/j.jpcs.2020.109609",
url = "https://hdl.handle.net/21.15107/rcub_dais_9541"
}

Bjelajac, A., Petrović, R., Vujančević, J., Veltruska, K., Matolin, V., Siketić, Z., Provatas, G., Jakšić, M., Stan, G. E., Socol, G., Mihailescu, I. N.,& Janaćković, Đ.. (2020). Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye. in Journal of Physics and Chemistry of Solids
Elsevier., 147, 109609.
https://doi.org/10.1016/j.jpcs.2020.109609
https://hdl.handle.net/21.15107/rcub_dais_9541

Bjelajac A, Petrović R, Vujančević J, Veltruska K, Matolin V, Siketić Z, Provatas G, Jakšić M, Stan GE, Socol G, Mihailescu IN, Janaćković Đ. Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye. in Journal of Physics and Chemistry of Solids. 2020;147:109609.
doi:10.1016/j.jpcs.2020.109609
https://hdl.handle.net/21.15107/rcub_dais_9541 .

Bjelajac, Anđelika, Petrović, Rada, Vujančević, Jelena, Veltruska, Katerina, Matolin, Vladimir, Siketić, Zdravko, Provatas, George, Jakšić, Milko, Stan, George E., Socol, Gabriel, Mihailescu, Ion N., Janaćković, Đorđe, "Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye" in Journal of Physics and Chemistry of Solids, 147 (2020):109609,
https://doi.org/10.1016/j.jpcs.2020.109609 .,
https://hdl.handle.net/21.15107/rcub_dais_9541 .

TY  - JOUR
AU  - Bjelajac, Anđelika
AU  - Petrović, Rada
AU  - Vujančević, Jelena
AU  - Veltruska, Katerina
AU  - Matolin, Vladimir
AU  - Siketić, Zdravko
AU  - Provatas, George
AU  - Jakšić, Milko
AU  - Stan, George E.
AU  - Socol, Gabriel
AU  - Mihailescu, Ion N.
AU  - Janaćković, Đorđe
PY  - 2020
UR  - http://www.sciencedirect.com/science/article/pii/S0022369719328525
UR  - https://dais.sanu.ac.rs/123456789/9540
AB  - We fabricated Sn-doped TiO2 nanotubular film via annealing of anodized TiO2 nanotubes grown on F–SnO2 (FTO) glass. Annealing was carried out at 500 °C in ambient air. Anatase crystal structure was achieved with no change in nanotubular morphology in respect to as-anodized amorphous TiO2 nanotubes. The X-ray photoelectron spectroscopy analysis revealed Sn on the surface of TiO2 film, following the thermal treatment, probably caused by the diffusion from FTO glass. Depth profile examination of the film chemical composition was conducted by elastic recoil detection analysis, which showed that in addition to the diffusion of Sn from FTO, diffusion of Ti to FTO concurrently occurred. Thus, a higher concentration of Sn was found at the bottom of the tubes, while a lower concentration was present on the tubes’ surface top. This explains the improved optical response revealed by a diffuse reflectance spectroscopy. The absorption enhancement demonstrated that Sn-doped TiO2 film was efficient in the degradation of methyl orange dye under visible light.
PB  - Elsevier
T2  - Journal of Physics and Chemistry of Solids
T1  - Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye
SP  - 109609
VL  - 147
DO  - 10.1016/j.jpcs.2020.109609
UR  - https://hdl.handle.net/21.15107/rcub_dais_9540
ER  - 

@article{
author = "Bjelajac, Anđelika and Petrović, Rada and Vujančević, Jelena and Veltruska, Katerina and Matolin, Vladimir and Siketić, Zdravko and Provatas, George and Jakšić, Milko and Stan, George E. and Socol, Gabriel and Mihailescu, Ion N. and Janaćković, Đorđe",
year = "2020",
abstract = "We fabricated Sn-doped TiO2 nanotubular film via annealing of anodized TiO2 nanotubes grown on F–SnO2 (FTO) glass. Annealing was carried out at 500 °C in ambient air. Anatase crystal structure was achieved with no change in nanotubular morphology in respect to as-anodized amorphous TiO2 nanotubes. The X-ray photoelectron spectroscopy analysis revealed Sn on the surface of TiO2 film, following the thermal treatment, probably caused by the diffusion from FTO glass. Depth profile examination of the film chemical composition was conducted by elastic recoil detection analysis, which showed that in addition to the diffusion of Sn from FTO, diffusion of Ti to FTO concurrently occurred. Thus, a higher concentration of Sn was found at the bottom of the tubes, while a lower concentration was present on the tubes’ surface top. This explains the improved optical response revealed by a diffuse reflectance spectroscopy. The absorption enhancement demonstrated that Sn-doped TiO2 film was efficient in the degradation of methyl orange dye under visible light.",
publisher = "Elsevier",
journal = "Journal of Physics and Chemistry of Solids",
title = "Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye",
pages = "109609",
volume = "147",
doi = "10.1016/j.jpcs.2020.109609",
url = "https://hdl.handle.net/21.15107/rcub_dais_9540"
}

Bjelajac, A., Petrović, R., Vujančević, J., Veltruska, K., Matolin, V., Siketić, Z., Provatas, G., Jakšić, M., Stan, G. E., Socol, G., Mihailescu, I. N.,& Janaćković, Đ.. (2020). Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye. in Journal of Physics and Chemistry of Solids
Elsevier., 147, 109609.
https://doi.org/10.1016/j.jpcs.2020.109609
https://hdl.handle.net/21.15107/rcub_dais_9540

Bjelajac A, Petrović R, Vujančević J, Veltruska K, Matolin V, Siketić Z, Provatas G, Jakšić M, Stan GE, Socol G, Mihailescu IN, Janaćković Đ. Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye. in Journal of Physics and Chemistry of Solids. 2020;147:109609.
doi:10.1016/j.jpcs.2020.109609
https://hdl.handle.net/21.15107/rcub_dais_9540 .

Bjelajac, Anđelika, Petrović, Rada, Vujančević, Jelena, Veltruska, Katerina, Matolin, Vladimir, Siketić, Zdravko, Provatas, George, Jakšić, Milko, Stan, George E., Socol, Gabriel, Mihailescu, Ion N., Janaćković, Đorđe, "Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye" in Journal of Physics and Chemistry of Solids, 147 (2020):109609,
https://doi.org/10.1016/j.jpcs.2020.109609 .,
https://hdl.handle.net/21.15107/rcub_dais_9540 .

TY  - CONF
AU  - Vujančević, Jelena
AU  - Bjelajac, Anđelika
AU  - Provatas, Georgios
AU  - Siketić, Zdravko
AU  - Jakšić, Milko
AU  - Pavlović, Vladimir B.
AU  - Janaćković, Đorđe
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/6985
AB  - Different semiconductors have been studied as photoanode material for solar cells. Among them, TiO2 has been shown to be the best material due to its chemical stability and good charge transport capability. It is usually deposited onto FTO glass (F-SnO2), and then heated at high temperature in order to obtain inter-crystalline electric contact for improving electron conductivity. The focus of this research was chemical analysis of the TiO2 nanotubes (NTs) obtained by anodization of titanium film on FTO glass using NH4F in ethylene glycol electrolyte. There are only few studies suggesting that the electrolyte is a source of N dopant in TiO2, but also Sn diffusion from FTO support was reported. This study aims to show the chemical distribution of elements of interest along the nanotubes depth. For that purpose the time-of-flight elastic recoil detection analysis (ToF-ERDA) and Rutherford backscattering (RBS) methods were used as complementary techniques for chemical analysis of both light, such is N, and heavy elements, such is Sn. The TiO2 NTs films were annealed at different temperatures (450– 630 °C) and the impact of the heating temperature on the chemical distribution was followed.
PB  - Novi Sad : Faculty of Technology
C3  - Programme and book of abstracts / 13th Conference for Young Scientists in Ceramics (CYSC-2017), October 16-19, 2019, Novi Sad
T1  - ToF-ERDA/RBS analysis of annealed TiO2 nanotubes grown onto FTO glass
SP  - 132
EP  - 132
UR  - https://hdl.handle.net/21.15107/rcub_dais_6985
ER  - 

@conference{
author = "Vujančević, Jelena and Bjelajac, Anđelika and Provatas, Georgios and Siketić, Zdravko and Jakšić, Milko and Pavlović, Vladimir B. and Janaćković, Đorđe",
year = "2019",
abstract = "Different semiconductors have been studied as photoanode material for solar cells. Among them, TiO2 has been shown to be the best material due to its chemical stability and good charge transport capability. It is usually deposited onto FTO glass (F-SnO2), and then heated at high temperature in order to obtain inter-crystalline electric contact for improving electron conductivity. The focus of this research was chemical analysis of the TiO2 nanotubes (NTs) obtained by anodization of titanium film on FTO glass using NH4F in ethylene glycol electrolyte. There are only few studies suggesting that the electrolyte is a source of N dopant in TiO2, but also Sn diffusion from FTO support was reported. This study aims to show the chemical distribution of elements of interest along the nanotubes depth. For that purpose the time-of-flight elastic recoil detection analysis (ToF-ERDA) and Rutherford backscattering (RBS) methods were used as complementary techniques for chemical analysis of both light, such is N, and heavy elements, such is Sn. The TiO2 NTs films were annealed at different temperatures (450– 630 °C) and the impact of the heating temperature on the chemical distribution was followed.",
publisher = "Novi Sad : Faculty of Technology",
journal = "Programme and book of abstracts / 13th Conference for Young Scientists in Ceramics (CYSC-2017), October 16-19, 2019, Novi Sad",
title = "ToF-ERDA/RBS analysis of annealed TiO2 nanotubes grown onto FTO glass",
pages = "132-132",
url = "https://hdl.handle.net/21.15107/rcub_dais_6985"
}

Vujančević, J., Bjelajac, A., Provatas, G., Siketić, Z., Jakšić, M., Pavlović, V. B.,& Janaćković, Đ.. (2019). ToF-ERDA/RBS analysis of annealed TiO2 nanotubes grown onto FTO glass. in Programme and book of abstracts / 13th Conference for Young Scientists in Ceramics (CYSC-2017), October 16-19, 2019, Novi Sad
Novi Sad : Faculty of Technology., 132-132.
https://hdl.handle.net/21.15107/rcub_dais_6985

Vujančević J, Bjelajac A, Provatas G, Siketić Z, Jakšić M, Pavlović VB, Janaćković Đ. ToF-ERDA/RBS analysis of annealed TiO2 nanotubes grown onto FTO glass. in Programme and book of abstracts / 13th Conference for Young Scientists in Ceramics (CYSC-2017), October 16-19, 2019, Novi Sad. 2019;:132-132.
https://hdl.handle.net/21.15107/rcub_dais_6985 .

Vujančević, Jelena, Bjelajac, Anđelika, Provatas, Georgios, Siketić, Zdravko, Jakšić, Milko, Pavlović, Vladimir B., Janaćković, Đorđe, "ToF-ERDA/RBS analysis of annealed TiO2 nanotubes grown onto FTO glass" in Programme and book of abstracts / 13th Conference for Young Scientists in Ceramics (CYSC-2017), October 16-19, 2019, Novi Sad (2019):132-132,
https://hdl.handle.net/21.15107/rcub_dais_6985 .