Enviar artigo por via de e-mail Low-Temperature Sol–Gel Synthesis and Photoactivity of Nanocrystalline TiO2 with the Anatase/Brookite Structure and an Amorphous Component
- Autores: Kozhevnikova N.S.1, Ul’yanova E.S.1, Shalaeva E.V.1, Zamyatin D.A.2,3, Bokunyaeva A.O.2, Yushkov A.A.2, Kolosov V.Y.2, Buldakova L.Y.1, Yanchenko M.Y.1, Gorbunova T.I.4, Pervova M.G.4, Enyashin A.N.1, Vorokh A.S.1
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Afiliações:
- Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences
- Ural Federal University Named after the First President of Russia B. N. Yeltsin
- Zavaritskii Institute of Geology and Geochemistry, Ural Branch, Russian Academy of Sciences
- Postovskii Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences
- Edição: Volume 60, Nº 3 (2019)
- Páginas: 325-336
- Seção: Article
- URL: https://journals.rcsi.science/0023-1584/article/view/164248
- DOI: https://doi.org/10.1134/S002315841903008X
- ID: 164248
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Resumo
Nanodispersed TiO2 consisting of anatase and brookite phases in a ratio of 3 : 1 is obtained by the sol–gel method from titanium(IV) butoxide at a temperature below 100°C. X-ray diffraction, transmission electron microscopy, and Raman spectroscopy are used to show that the size of anatase particles is about 6 nm, and brookite particles consist of a crystal core, 4 nm in diameter, surrounded by an amorphous shell. Compared with the commercial Degussa P25 photocatalyst, which consists of the anatase and rutile phases in the same 3 : 1 ratio, the resulting TiO2 exhibits an increased photoactivity in hydroquinone oxidation. Quantum chemical modeling of anatase and brookite surfaces as well as their interface does not reveal the specific features of their electronic structure. This fact is indicative of the amorphous phase as an active participant in the transfer of charge carriers in the photocatalytic process.
Sobre autores
N. Kozhevnikova
Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences
Email: tsivileva.yekaterina@yandex.ru
Rússia, Yekaterinburg, 620990
E. Ul’yanova
Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences
Autor responsável pela correspondência
Email: tsivileva.yekaterina@yandex.ru
Rússia, Yekaterinburg, 620990
E. Shalaeva
Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences
Email: tsivileva.yekaterina@yandex.ru
Rússia, Yekaterinburg, 620990
D. Zamyatin
Ural Federal University Named after the First President of Russia B. N. Yeltsin; Zavaritskii Institute of Geology and Geochemistry, Ural Branch, Russian Academy of Sciences
Email: tsivileva.yekaterina@yandex.ru
Rússia, Yekaterinburg, 620002; Yekaterinburg, 620016
A. Bokunyaeva
Ural Federal University Named after the First President of Russia B. N. Yeltsin
Email: tsivileva.yekaterina@yandex.ru
Rússia, Yekaterinburg, 620002
A. Yushkov
Ural Federal University Named after the First President of Russia B. N. Yeltsin
Email: tsivileva.yekaterina@yandex.ru
Rússia, Yekaterinburg, 620002
V. Kolosov
Ural Federal University Named after the First President of Russia B. N. Yeltsin
Email: tsivileva.yekaterina@yandex.ru
Rússia, Yekaterinburg, 620002
L. Buldakova
Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences
Email: tsivileva.yekaterina@yandex.ru
Rússia, Yekaterinburg, 620990
M. Yanchenko
Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences
Email: tsivileva.yekaterina@yandex.ru
Rússia, Yekaterinburg, 620990
T. Gorbunova
Postovskii Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences
Email: tsivileva.yekaterina@yandex.ru
Rússia, Yekaterinburg, 620219
M. Pervova
Postovskii Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences
Email: tsivileva.yekaterina@yandex.ru
Rússia, Yekaterinburg, 620219
A. Enyashin
Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences
Email: tsivileva.yekaterina@yandex.ru
Rússia, Yekaterinburg, 620990
A. Vorokh
Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences
Email: tsivileva.yekaterina@yandex.ru
Rússia, Yekaterinburg, 620990
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