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

Ou, Jian Zhen, Rania, Rozina A, Balendhran, Sivacarendran, Zoolfakar, Ahmad Sabirin, Field, Matthew R, Zhuiykov, Serge, O'Mullane, Anthony P., & Kalantar-zadeh, Kourosh (2012) Anodic formation of a thick three-dimensional nanoporous WO3 film and its photocatalytic property. Electrochemistry Communications, 27, pp. 128-132.

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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.

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ID Code: 64330
Item Type: Journal Article
Refereed: Yes
DOI: 10.1016/j.elecom.2012.11.009
ISSN: 1388-2481
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 12 Nov 2013 23:27
Last Modified: 19 Nov 2013 00:45

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