Preparation and characterization of a SnO2/TiO2 bilayer thin film photocatalyst

Authors
Isago, T Morino, A Kawai, S Nagami, N Sato, S Ishitsu, H
Citation
T. Isago et al., Preparation and characterization of a SnO2/TiO2 bilayer thin film photocatalyst, J CERAM S J, 109(9), 2001, pp. 789-792
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
ISSN journal
09145400 → ACNP
Volume
109
Issue
9
Year of publication
2001
Pages
789 - 792
Database
ISI
SICI code
0914-5400(200109)109:9<789:PACOAS>2.0.ZU;2-M
Abstract
Bilayered SnO2/TiO2 thin films (SnO2-overlayer/TiO2-underlayer) have been p repared on a glass substrate by a spin-coating method using a solution of t itanium alkoxide and tin alkoxide. Heating temperature of 500 degreesC was adopted to convert TiO2 and SnO2 precursors into TiO2 and SnO2 polycrystall ine films, respectively. The bilayer-type photocatalyst had a high transpar ency in the visible region and exhibited a very high photocatalytic activit y for the decomposition of organic compounds in water under UV irradiation as compared with TiO2 thin film. The SnO2 surface of SnO2/TiO2 thin film al so exhibited high hydrophilicity after UV irradiation as well as TiO2 thin film.