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Photocatalytic Properties of TiO2 / WO3 / FTO Multi-layer Structures Prepared by Spray Pyrolysis Deposition

Published online by Cambridge University Press:  22 February 2013

Masahiko Maeda  and
Takahiro Horikawa
Masahiko Maeda
Affiliation:
Kanazawa Institute of Technology, 7-1 Ohgigaoka, Nonoichi, Ishikawa, 921-8501, Japan
Takahiro Horikawa
Affiliation:
Kanazawa Institute of Technology, 7-1 Ohgigaoka, Nonoichi, Ishikawa, 921-8501, Japan
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Abstract

Visible-light photocatalytic property of TiO2 / WO3 / FTO multi-layer structure was investigated. In this structure, the visible-light absorption takes place in the WO3 layer, and generated electrons and holes diffuse into the FTO and TiO2 layers, respectively. The holes diffused into the valence band of the TiO2 layer produce the hydroxyl radicals due to oxidation of H2O and/or OH− adsorbed on the TiO2 surface. The FTO bottom layer, which acts as a scavenger of electrons, contributes to an effective charge separation. As a result, the visible-light photocatalysis is enhanced in this structure.

Keywords

catalyticspray pyrolysislayered
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1492: Symposium D/G – Materials for Sustainable Development—Challenges and Opportunities , 2013 , pp. 143 - 148
Copyright
Copyright © Materials Research Society 2013 

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References

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