Anodic formation of a thick three-dimensional nanoporous WO3 film and its photocatalytic property

Ou, J, Abdul Rani, R, Balendhran, S, Zoolfakar, A, Field, M, Zhuiykov, S, O'Mullane, A and Kalantar Zadeh, K 2013, 'Anodic formation of a thick three-dimensional nanoporous WO3 film and its photocatalytic property', Electrochemistry Communications, vol. 27, pp. 128-132.


Document type: Journal Article
Collection: Journal Articles

Title Anodic formation of a thick three-dimensional nanoporous WO3 film and its photocatalytic property
Author(s) Ou, J
Abdul Rani, R
Balendhran, S
Zoolfakar, A
Field, M
Zhuiykov, S
O'Mullane, A
Kalantar Zadeh, K
Year 2013
Journal name Electrochemistry Communications
Volume number 27
Start page 128
End page 132
Total pages 5
Publisher Elsevier
Abstract We report an efficient solar-light-driven photocatalyst based on three-dimensional nanoporous tungsten trioxide (WO3) films. These films are obtained by anodizing W foils in fluoride-containing electrolytes at room temperature and under low applied voltages with an efficient growth rate of 2 μm h− 1. The maximum thickness of the films is ~ 3 μm that exceeds those of previously reported anodized WO3 films in fluoride-containing electrolytes. By investigating the photocatalytic properties of the films with thicknesses ranging from ~ 0.5 to ~ 3 μm, the optimum thickness of the nanoporous film is found to be ~ 1 μm, which demonstrates an impressive 120% improvement in the photocatalytic performance compared to that of a RF-sputtered nanotextured film with similar weights. We mainly ascribe this to large surface area and smaller bandgap.
Subject Electrochemistry
Keyword(s) Anodization
Tungsten trioxide
WO3
Nanoporous
Three-dimensional nanostructure
Photocatalyst
DOI - identifier 10.1016/j.elecom.2012.11.009
Copyright notice © 2012 Elsevier B.V. All rights reserved
ISSN 1388-2481
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