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Influence of Calcination on Photocatalytic Properties of Nonstoichiometric Titanium Dioxide Nanotubes Full article

Journal Journal of Alloys and Compounds
ISSN: 0925-8388 , E-ISSN: 1873-4669
Output data Year: 2019, Volume: 796, Pages: 293-299 Pages count : 7 DOI: 10.1016/j.jallcom.2019.04.342
Tags Nonstoichiometry; Phase transformation; SEM; TEM; Titanium dioxide nanotubular films; Visible light photocatalysis; XRD
Authors Valeeva Albina A. 1,2 , Dorosheva Irina B. 1,2 , Kozlova Ekaterina A. 3 , Kamalov Robert V. 1 , Vokhmintsev Alexander S. 1 , Selishchev Dmitry S. 3 , Saraev Andrey A. 3 , Gerasimov Evgeny Yu. 3 , Weinstein Ilya A. 1 , Rempel Andrey A. 1,2,4
Affiliations
1 Ural Federal University, NANOTECH Centre, Yekaterinburg, 620002, Russian Federation
2 Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences, Ekaterinburg, 620990, Russian Federation
3 Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
4 Institute of Metallurgy, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620016, Russian Federation

Funding (1)

1 Russian Foundation for Basic Research 17-03-00702 (АААА-А17-117041010068-9)

Abstract: The nonstoichiometric titanium dioxide nanotubular films were synthesized by the anodization of titanium foil in a solution of ethylene glycol and ammonium fluoride. The calcination of films at the temperatures of 200–600 °C led to the changes in their morphology, structure, phase composition, and properties. During the calcination, amorphous phase of titanium oxide in the prepared films was converted into anatase (space group I41 /amd)at ca. 300 °C followed by the transformation of anatase to rutile (space group P42 /mnm) at the temperatures above 500 °C. The optical band gap was decreased as the calcination temperature was increased due to the changes in stoichiometry and phase composition of nanotubular films. A complete mineralization of acetone vapor in a continuous-flow reactor using the nanotubular films was carried out for the first time. The photocatalytic activity of the film calcined at 500 °C in the reaction of acetone oxidation to carbon dioxide under visible light (λ max = 450 nm) was found to be 4 times higher than the activity of commercially available TiO2 P25. A high defectiveness and an extended surface were the reasons for an enhanced photocatalytic activity of the synthesized nanotubular films under visible light.
Cite: Valeeva A.A. , Dorosheva I.B. , Kozlova E.A. , Kamalov R.V. , Vokhmintsev A.S. , Selishchev D.S. , Saraev A.A. , Gerasimov E.Y. , Weinstein I.A. , Rempel A.A.
Influence of Calcination on Photocatalytic Properties of Nonstoichiometric Titanium Dioxide Nanotubes
Journal of Alloys and Compounds. 2019. V.796. P.293-299. DOI: 10.1016/j.jallcom.2019.04.342 WOS Scopus РИНЦ AN OpenAlex
Dates:
Submitted: Nov 14, 2018
Accepted: Apr 30, 2019
Published online: May 4, 2019
Published print: Aug 1, 2019
Identifiers:
Web of science: WOS:000469820900033
Scopus: 2-s2.0-85065516571
Elibrary: 38705614
Chemical Abstracts: 2019:975522
OpenAlex: W2944216161
Citing:
DB Citing
Scopus 33
Web of science 31
Elibrary 39
OpenAlex 34
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