Preparation of Porous F-WO3-TiO2 Films with Visible-Light Photocatalytic Activity by Microarc OxidationReportar como inadecuado

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International Journal of PhotoenergyVolume 2012 2012, Article ID 285129, 9 pages

Research Article

Department of Information System, Kao Yuan University, Kaohsiung 811, Taiwan

Department of Marine Engineering, National Kaohsiung Marine University, Kaohsiung 811, Taiwan

Department of Safety, Health and Environmental Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung 811, Taiwan

Metal Industries Research and Development Centre, Kaohsiung 811, Taiwan

Received 14 July 2011; Accepted 8 September 2011

Academic Editor: Jae Sung Lee

Copyright © 2012 Chung-Wei Yeh et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Porous F-WO3-TiO2 mTiO2 films are prepared on titanium sheet substrates using microarc oxidation MAO technique. The X-ray diffraction patterns show that visible-light Vis enabling mTiO2 films with a very high content of anatase TiO2 and high loading of WO3 are successfully synthesized at a low applied voltage of 300 V using electrolyte contenting NaF and Na2WO4 without subsequent heat treatment. The cross-sectional transmission electron microscopy micrograph reveals that the mTiO2 films feature porous networks connected by many micron pores. The diffused reflection spectrum displays broad absorbance across the UV-Vis regions and a significant red shift in the band gap energy ~2.23 eV for the mTiO2 film. Owing to the high specific surface area from the porous microstructure, the mTiO2 film shows a 61% and 50% rate increase in the photocatalytic dye degradation, as compared with the N,C-codoped TiO2 films under UV and Vis irradiation, respectively.

Autor: Chung-Wei Yeh, Kee-Rong Wu, Chung-Hsuang Hung, Hao-Cheng Chang, and Chuan-Jen Hsu



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