Published date: Dec 31 2020

Journal Title: KnE Materials Science

Issue title: IV Congress “Fundamental Research and Applied Developing of Recycling and Utilization Processes of Technogenic Formations” Volume 2020

Pages: 19–23

DOI: 10.18502/kms.v6i1.8037

A. A. Valeeva - anibla_v@mail.ru

I. B. Dorosheva

I. A. Weinstein

A. A. Rempel

E. A. Kozlova

In the present work we have synthesized nanotubular TiO₂ film with a nonstoichiometric layer in the vicinity of titanium foil by anodization during 120 min. The catalytic activity of nanotubular titanium dioxide films formed during the oxidation of acetone to carbon dioxide under the action of visible light with a wavelength of 450 nm was found to be approximately 2 times higher compared to standard titanium dioxide (Degussa P25). Such a pronounced enhancement of activity may be attributed to a more efficient absorption of visible light by the films due to narrowing of the optical gap because of difference in the nonstoichiometry of titanium dioxide near the interface between nanotubular film and the titanium foil substrate.

Keywords: photocatalysis, nonstoichiometric titanium dioxide, purification of water

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