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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.122  No.1426 (June) (2014)  >  pp.393-397

Journal of the Ceramic Society of Japan
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Synergistic effect between TiO2 and ubiquitous metal oxides on photocatalytic activity of composite nanostructures

Ivan TURKEVYCH1), Sofia KOSAR2), Yuriy PIHOSH3), Kazuma MAWATARI3), Takehiko KITAMORI3), Jinhua YE1), Kiyoshi SHIMAMURA1)
1) National Institute for Materials Science 2) Faculty of Physics of the Chernivtsy National University 3) Department of Applied Chemistry, The University of Tokyo

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.

Photocatalysis, TiO2 nanotubes, Suboxides, Nanoclusters, Atomic layer deposition

Received: November 30, 2013
Accepted: January 11, 2014 , Published online: June 01, 2014
Copyright © 2014 The Ceramic Society of Japan



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