Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 137, Issue 1, Pages 63-69Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S1010-6030(00)00351-8
Keywords
eosin Y; photocatalyst; silane-coupling reagent; Pt-TiO2; water-splitting; dye-sensitization
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A chemical fixation of xanthene dyes on platinized TiO2 particles via silane-coupling reagent was attempted in order to construct a stable dye-sensitized photocatalyst system in water. The Eosin Y fixed Pt-TiO2 (E.Y-TiO2) exhibited steady H-2 production from aqueous triethanolamine solution (TEOA aq.) under visible light irradiation for long time, and the H-2 evolution reproduced even after the exchange of TEOA aq., while the H-2 evolution from the mixture of Eosin Y (E.Y) and Pt-TiO2 ceased in 10h. The turnover number of the dye molecule fixed on TiO2 surface reached more than 10,000, and the quantum yield of the E.Y-TiO2 at 520 nm was determined to be about 10%. (C) 2000 Elsevier Science B.V. All rights reserved.
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