AVS 50th International Symposium
    Thin Films Wednesday Sessions
       Session TF-WeP

Paper TF-WeP5
Photocatalytic Activity and Surface Wettability of TiO@sub 2@/SnO@sub 2@ Heterojunction System

Wednesday, November 5, 2003, 11:00 am, Room Hall A-C

Session: Poster Session
Presenter: N. Kanai, The University of Tokyo, Japan
Authors: N. Kanai, The University of Tokyo, Japan
C. Saiki, The University of Tokyo, Japan
Y. Fukunaga, Tokyo University of Science, Japan
M. Abe, Tokyo University of Science, Japan
K. Hashimoto, The University of Tokyo, Japan
T. Watanabe, The University of Tokyo, Japan
H. Ohsaki, The University of Tokyo, Japan
Correspondent: Click to Email
Photocatalytic efficiency of TiO@sub 2@/SnO@sub 2@ (TiO@sub 2@ overcoated with SnO@sub 2@) heterojunction system was investigated. TiO@sub 2@ and SnO@sub 2@ thin film stacks were deposited on sodalime glass by reactive DC magnetron sputtering using Ti and Sn metal targets. Photocatalytic efficiency of TiO@sub 2@/SnO@sub 2@ thin film stacks was evaluated by gas-phase isopropanol (IPA) photodegradation with UV light irradiation. Photocatalytic efficiency of TiO@sub 2@/SnO@sub 2@ thin film stacks depends on electric conductivity and packing density of overcoating SnO@sub 2@. This result suggests that photogenerated holes might work as a main photocatalysis actor; oxygen defects in SnO@sub 2@ trap photogenerated holes. The results also indicate that the interface between TiO@sub 2@ and SnO@sub 2@ has a great influence on photocatalytic efficiency. Surface wettability of TiO@sub 2@/SnO@sub 2@ thin film stacks was dramatically improved.