Photoinduced electron transfer from anatase to rutile in partially reduced TiO2 (P-25) nanoparticles:: An ESR study

被引：89

作者：

Komaguchi, Kenji ^{[1
]}

Nakano, Haruka ^{[1
]}

Araki, Atsunori ^{[1
]}

Harima, Yutaka ^{[1
]}

机构：

[1] Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Higashihiroshima 7398527, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2006年 / 428卷 / 4-6期

基金：

日本学术振兴会;

关键词：

D O I：

10.1016/j.cplett.2006.07.003

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 photoeffects of trapped electrons (Ti3+) in partially reduced TiO2 nanoparticles were studied by in situ ESR spectroscopy. For the pure phase samples, upon illumination with an energy lower than the band gap, the Ti3+ spectra decreased in intensity; however, the initial ESR signal was restored within 30 min in the dark at 77 K. For the TiO2 (P-25) particles, the ESR line shape changed significantly with being constant in the integrated intensity of the signal after the restoration. It was found that the trapped electrons can transfer from the anatase phase to the rutile phase in TiO2 (P-25) by photoexcitation. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：338 / 342

页数：5

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