Photo-Catalytic activity of different thicknesses TiO2/SnO 2double layer nano composite thin films

Abstract

TiO2 thin films were deposited on rutile SnO2 films by reactive radio frequency magnetron sputtering. The effect of thickness of TiO2Clayer, on the microstructure and chemical states of the TiO 2/SnO2 thin films, was investigated in detail. With the increase of T1O2 film thickness: deposited on SnO2 film, the crystallization of TiO2 film becomes more perfect, and more Ti atoms are bonding in forms of stoichiometric TiO2 There is a thickness of TiO2 film (150nm) deposited on Sn2 substrate that yields the best photo-induced superhydrophilicity and surface wettability. © 2009 The Japan Institute of Metals.