Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
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Synergistic effect between TiO2 and ubiquitous metal oxides on photocatalytic activity of composite nanostructures
Ivan TURKEVYCHSofia KOSARYuriy PIHOSHKazuma MAWATARITakehiko KITAMORIJinhua YEKiyoshi SHIMAMURA
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2014 Volume 122 Issue 1426 Pages 393-397

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Abstract

We studied photocatalytic activity of highly porous nanotubular TiO2 films modified with nanoclusters of ubiquitous metal (Ti, Al, Zn, Sn, Cu, W) oxides prepared by chemical bath deposition and atomic layer deposition as well as nanoclusters of metal rich suboxides and mixed titania suboxides prepared by atomic layer deposition by following decomposition of methylene blue under simulated solar light. The mixed titania suboxide clusters constructed on the surface of TiO2 nanotubes by atomic layer deposition demonstrated significantly enhanced photocatalytic activity in comparison to the naked TiO2 nanotubes attributed to the better absorption of visible light due to the upward shift of the valence band near the TiO2 surface induced by the suboxide clusters that feature low valence states and metal-metal bonds.

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© 2014 The Ceramic Society of Japan
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