Titania and tungsten doped titania thin films on glass: active photocatalysts

Rampaul, A. and Parkin, I.P. and O'Neill, S.A. and DeSouza, J. and Mills, A. and Elliott, N. (2003) Titania and tungsten doped titania thin films on glass: active photocatalysts. Polyhedron, 22 (1). pp. 35-44. ISSN 0277-5387 (http://dx.doi.org/10.1016/S0277-5387(02)01333-5)

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Abstract

Acidification of an isopropanol solution containing mixtures of [Ti(OPri)(4)] and [W(OEt)(5)] produced solutions from which various TiO2, WO3 and TiO2/WO3 thin films could be obtained by dip coating and annealing. The films were analysed by X-ray diffraction, SEM/EDAX, Raman, electronic spectra, contact angle and photoactivity with respect to destruction of an over layer of stearic acid. The TiO2/WO3 films were shown to be mixtures of two phases TiO2 and WO3 rather than a solid solution TixWyO2. The 2% tungsten oxide doped titania films were shown to be the most effective photocatalysts. All of the TiO2 and TiO2/WO3 films showed light induced superhydrophillicity.

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