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Electrochemically Assisted Photocatalysis of Hybrid WO3/TiO2 Films: Effect of the WO3 Structures on Charge Separation Behavior

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Abstract

In this study, the photocatalysis of hybrid WO3/TiO2 films with different loadings of WO3 were investigated with and without potential bias. It was clearly indicated that hybrid WO3/TiO2 films show less photo-reactivity under only UV-irradiation, while more effective photocatalysis under potential bias than either TiO2 or WO3 by themselves, their photocatalytic performance depending on the loadings of WO3. In particular, a hybrid WO3/TiO2 film involving an amorphous-like WO3 phase plays a significant role in an enhancement of the electrochemically assisted photocatalysis.

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Acknowledgements

We thank Prof. Masakazu Anpo in Osaka Prefecture University for his useful discussion. The research described herein was partially supported by the Yazaki Memorial Foundation for Science & Technology and we would like to express our thanks for their kind assistance.

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Authors and Affiliations

  1. Department of Applied Chemistry, College of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka, 535-8585, Japan

    Shinya Higashimoto, Yoshiaki Ushiroda & Masashi Azuma

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  1. Shinya Higashimoto
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  2. Yoshiaki Ushiroda
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  3. Masashi Azuma
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Correspondence to Shinya Higashimoto.

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Higashimoto, S., Ushiroda, Y. & Azuma, M. Electrochemically Assisted Photocatalysis of Hybrid WO3/TiO2 Films: Effect of the WO3 Structures on Charge Separation Behavior. Top Catal 47, 148–154 (2008). https://doi.org/10.1007/s11244-007-9026-3

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  • DOI: https://doi.org/10.1007/s11244-007-9026-3

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