Abstract:
Isovalent Sn4+ dopant cations do not have a significant effect on the ultraviolet photocatalytic activity of anatase (TiO2) regardless of their location in the bulk or at the surfaces of crystallites. This is due to the formation of no charge balance oxygen vacancies VO acting as (e–,h+) recombination centers towards photogenerated electrons and holes upon doping with Sn4+. Nevertheless, the analysis of a sample containing surfacelocated heterovalent Sb3+ ions (isoelectronic with Sn2+) revealed a significant weakening of the negative effect of VO, which can be accounted for by the presence of a stereochemically active lone pair E of 5s electrons in the nearest vicinity of VO.
Citation:
M. V. Korolenko, P. B. Fabrichnyi, M. I. Afanasov, “Effects of Sn4+ dopant ions located either in the bulk or at crystallite surfaces on the ultraviolet photocatalytic activity of anatase”, Mendeleev Commun., 31:4 (2021), 570–571
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https://www.mathnet.ru/eng/mendc993
https://www.mathnet.ru/eng/mendc/v31/i4/p570
This publication is cited in the following 5 articles:
Isra Stambouli, Madiha Zerouali, Radouane Daïra, Dikra Bouras, Gamal A. El-Hiti, Souren Grigorian, Mamoun Fellah, “Enhancement of tin-doping on the structural, electrical, and optical properties of copper oxide thin films for optoelectronic applications”, Ceramics International, 2025
M. V. Korolenko, P. B. Fabrichnyi, Yu. A. Teterin, K. I. Maslakov, M. I. Afanasov, “A particular mechanism of the effect of lone pair E TeIV dopant atoms on visible-light photocatalytic activity of anatase TiO2”, Mendeleev Commun., 34:3 (2024), 440–441
M. V. Korolenko, P. B. Fabrichnyi, M. I. Afanasov, “119Sn Mössbauer spectroscopic insight into the effect of surface-located tin dopant cations on the visible-light photocatalytic activity of anatase TiO2”, Mendeleev Commun., 33:1 (2023), 133–134
M. V. Korolenko, P. B. Fabrichnyi, M. I. Afanasov, “Application of the 121Sb Mössbauer spectroscopy to characterizing titania-based photocatalysts modified by lone pair cations”, Mendeleev Commun., 33:6 (2023), 864–865
M. V. Korolenko, P. B. Fabrichnyi, M. I. Afanasov, “Effect of a long-term exposure of anatase TiO2 powder doped with surface-located Sb3+ ions to UV radiation on its photocatalytic activity”, Mendeleev Commun., 31:6 (2021), 896–898
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