期刊
ELECTROCHEMISTRY
卷 70, 期 6, 页码 442-445出版社
ELECTROCHEMICAL SOC JAPAN
DOI: 10.5796/electrochemistry.70.442
关键词
titanium(IV) oxide; 1,1 '-binaphthalene-2,2 '-diol; surface complex; visible light
The reaction between titanium(IV) oxide (TiO2) powders and 1,1'-binaphthalene-2,2'-diol (bn(OH)(2)), both of which are originally colorless, led to the formation of surface TiO2-bn(OH)(2) complexes giving a broad absorption in the visible-light region below ca. 550 nm. When the surface complex was made on TiO2 loaded with platinum deposits, the powder exhibited photocatalytic activity for H-2 evolution from deaerated triethanolamine solution under visible-light irradiation (>430 nm). On the basis of the experimental results, the reaction mechanism seems to involve visible-light excitation of the surface complexes, electron injection to TiO2, and its migration to platinum deposits, where reduction of H+ takes place.
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