Remote bleaching of methylene blue by UV-irradiated TiO2 in the gas phase

被引：143

作者：

Tatsuma, T ^{[1
]}

Tachibana, S ^{[1
]}

Miwa, T ^{[1
]}

Tryk, DA ^{[1
]}

Fujishima, A ^{[1
]}

机构：

[1] Univ Tokyo, Fac Engn, Dept Appl Chem, Bunkyo Ku, Tokyo 1138656, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1999年 / 103卷 / 38期

关键词：

D O I：

10.1021/jp9918297

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The remote bleaching of a dye, methylene blue, by UV-irradiated TiO2 was studied in the gas phase. A TiO2-coated glass plate was faced to a glass plate coated with methylene blue, separated by a small gap (12.5 to 500 mu m), and the TiO2 coating was irradiated with UV light from the back. As a result, methylene blue was bleached in the gas phase containing oxygen, although it was inhibited by ethanol vapor. The remote bleaching is not a simple reduction of methylene blue to its leuco form; methylene blue is probably oxygenated or decomposed. The bleaching process may be caused by active oxygen species that are generated at the TiO2 surface and transported to the methylene blue layer.

引用

页码：8033 / 8035

页数：3

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