Abstract:
Loss in the photocatalytic activity of Cr3+: TiO2 powders upon hydrogen annealing shows that charge-compensating oxygen vacancies VO and Cr6+ ions can have opposite effects on the kinetics of photocatalytic decolorization of methyl orange solution. The former ones inhibit this reaction acting as electron–hole recombination centers, and the latter ones promote it playing the role of active sites. This conclusion is verified by an XPS technique for a Cr3+-doped TiO2 sample and by 121Sb Mössbauer spectroscopy for a co-doped (Cr3+,Sb5+): TiO2 sample.
Citation:
M. V. Korolenko, P. B. Fabrichnyi, M. I. Afanasov, Ch. Labrugère, “Individual effect of charge balance defects on the photocatalytic activity of Cr3+-modified TiO2”, Mendeleev Commun., 29:6 (2019), 718–719
Linking options:
https://www.mathnet.ru/eng/mendc1644
https://www.mathnet.ru/eng/mendc/v29/i6/p718
This publication is cited in the following 8 articles:
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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
A. A. Shutilov, G. A. Zenkovets, “Synergetic Effect of an Iron Oxide Additive to the Composition of a Support for a Pt/TiO2 Catalyst in the Carbon Monoxide Oxidation Reaction”, Kinet Catal, 62:5 (2021), 621
N. S. Kovalevskiy, M. N. Lyulyukin, D. V. Kozlov, D. S. Selishchev, “Cu-grafted TiO2 photocatalysts: effect of Cu on the action spectrum of composite materials”, Mendeleev Commun., 31:5 (2021), 644–646
M. V. Korolenko, P. B. Fabrichnyi, M. I. Afanasov, “Effect of Sb5+ codopant ions on the ultraviolet photocatalytic activity of Fe3+-modified anatase”, Mendeleev Commun., 30:6 (2020), 770–771
M. N. Lyulyukin, A. Yu. Kurenkova, A. V. Bukhtiyarov, E. A. Kozlova, “Carbon dioxide reduction under visible light: a comparison of cadmium sulfide and titania photocatalysts”, Mendeleev Commun., 30:2 (2020), 192–194
J. Cui, M. Zhang, Ch. Wei, J. Zhu, X. Wang, X. Du, “In situ growth of four MOF/LZH composites on layered zinc hydroxide and their photocatalytic performance in decomposition of organic dyes”, Mendeleev Commun., 30:3 (2020), 282–284
M. V. Korolenko, P. B. Fabrichnyi, M. I. Afanasov, “Effect of charge balance vacancies on the ultraviolet photocatalytic activity of Fe3+-doped anatase”, Mendeleev Commun., 30:3 (2020), 383–384
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