Experimental evidence for electron localization on Au upon photo-activation of Au/anatase catalysts

被引：38

作者：

Carneiro, Joana T.

Savenije, Tom J. ^{[1
]}

Mul, Guido ^{[1
]}

机构：

[1] Delft Univ Technol, DelftChem Tech, Optoelect Mat Sect, NL-2628 BL Delft, Netherlands

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2009年 / 11卷 / 15期

关键词：

PHOTOCATALYTIC DEGRADATION; CHARGE SEPARATION; CARRIER DYNAMICS; TIO2; GOLD; AU/TIO2; EFFICIENCY; FILMS; TIME; NANOPARTICLES;

D O I：

10.1039/b820425j

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：

Time resolved microwave conductivity (TRMC) measurements show that the presence of Au on anatase Hombikat UV100 significantly reduces the lifetime of mobile electrons formed by photo-excitation of this photocatalyst in 300 nm. providing evidence for the widely acclaimed electron localization effect of Au in promoting TiO2 photocatalysts. Electron localization efficiency of Au Was even higher for Au-promoted Hombikat calcined in 400 degrees C, explained by enlargement of the anatase Particle size and the associated, relatively larger fraction of anatase particles in direct contact with Au.

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收藏

页码：2708 / 2714

页数：7

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