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Titanium dioxide nanoparticles heavily doped with niobium: A light-induced electron paramagnetic resonance study

Vladimir Yur'evich Osipov 1, 2
Vladimir Yur'evich Osipov
, 
Dong Hao 3, 4
Dong Hao
, 
Kazuyuki Takai 2
Kazuyuki Takai
, 
Tetsuo Uchikoshi 4, 5
Tetsuo Uchikoshi
, 
Hironori Ogata 2, 4
Hironori Ogata
, 
Takamasa Ishigaki 2, 4
Takamasa Ishigaki
1 Ioffe Institute, St. Petersburg, Russian Federation
2 Department of Chemical Science and Technology, Hosei University, Tokyo, Japan
3 Ceramic Research Center, Saga University, Arita, Saga, Japan
4 Research Center for Micro-Nano Technology, Hosei University, Koganei, Tokyo, Japan
5 Research Center for Functional Materials, National Institute for Material Science, Tsukuba, Ibaraki, Japan
10.1016/j.mencom.2023.04.017
Published 2023-04-13
Communication , Volume 33, Issue 3, 349-352
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Osipov V. Y. et al. Titanium dioxide nanoparticles heavily doped with niobium: A light-induced electron paramagnetic resonance study // Mendeleev Communications. 2023. Vol. 33. No. 3. pp. 349-352.
GOST all authors (up to 50) Copy
Osipov V. Y., Hao D., Takai K., Uchikoshi T., Ogata H., Ishigaki T. Titanium dioxide nanoparticles heavily doped with niobium: A light-induced electron paramagnetic resonance study // Mendeleev Communications. 2023. Vol. 33. No. 3. pp. 349-352.
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TY - JOUR
DO - 10.1016/j.mencom.2023.04.017
UR - https://mendcomm.colab.ws/publications/10.1016/j.mencom.2023.04.017
TI - Titanium dioxide nanoparticles heavily doped with niobium: A light-induced electron paramagnetic resonance study
T2 - Mendeleev Communications
AU - Osipov, Vladimir Yur'evich
AU - Hao, Dong
AU - Takai, Kazuyuki
AU - Uchikoshi, Tetsuo
AU - Ogata, Hironori
AU - Ishigaki, Takamasa
PY - 2023
DA - 2023/04/13
PB - Mendeleev Communications
SP - 349-352
IS - 3
VL - 33
ER -
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@article{2023_Osipov,
author = {Vladimir Yur'evich Osipov and Dong Hao and Kazuyuki Takai and Tetsuo Uchikoshi and Hironori Ogata and Takamasa Ishigaki},
title = {Titanium dioxide nanoparticles heavily doped with niobium: A light-induced electron paramagnetic resonance study},
journal = {Mendeleev Communications},
year = {2023},
volume = {33},
publisher = {Mendeleev Communications},
month = {Apr},
url = {https://mendcomm.colab.ws/publications/10.1016/j.mencom.2023.04.017},
number = {3},
pages = {349--352},
doi = {10.1016/j.mencom.2023.04.017}
}
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MLA Copy
Osipov, Vladimir Yur'evich, et al. “Titanium dioxide nanoparticles heavily doped with niobium: A light-induced electron paramagnetic resonance study.” Mendeleev Communications, vol. 33, no. 3, Apr. 2023, pp. 349-352. https://mendcomm.colab.ws/publications/10.1016/j.mencom.2023.04.017.

Keywords

charge transfer.
electron and hole traps
electron paramagnetic resonance
niobium
photocatalysts
titanium dioxide

Abstract

Light-induced electron paramagnetic resonance (EPR) spectra of titanium dioxide nanoparticles heavily doped with niobium(v) are studied. At low temperatures, the EPR signal caused by interband illumination is associated with paramagnetic Ti3+ sites in anatase, which, as the temperature rises above 210 K, are discharged to the non-paramagnetic Ti4+ state due to the escape of trapped photoelectrons and their recombination with holes. The temperature dependence of the integral EPR signal has a non-Curie character, especially in the temperature range where the discharge of Ti3+ centers is already significant.

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