Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 146, Issue 1-2, Pages 121-128Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S1010-6030(01)00553-6
Keywords
TiO2; thin film; photocatalyst; solvothermal method; CHCl3 decomposition; gamma-alumina
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Colloidal solutions containing nano-sized TiO2 particles were successfully obtained by adding a small amount of water and employing solvothermal method. A thin film obtained from this colloidal solution (Cat. 2) exhibited much better properties than another film obtained via a sol-gel method (Cat. 1). The former had smaller and more uniform TiO2 particles than the latter; it also had the anatase structure even after drying at 200 degreesC; a much thinner film of Cat. 2 could be obtained and this film could remain stably attached on a silicon wafer or on a pyrex plate after a thermal treatment. Cat. 2 coated on a gamma -alumina exhibited excellent performance for photocatalytic decomposition of CHCl3 under UV-light with O-2 bubbling (90% conversion in 10 min), when comparing with a result obtained without the catalyst (70% conversion after 1 h). (C) 2001 Elsevier Science B.V. All rights reserved.
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