ESR Study on the Reversible Electron Transfer from O22- to Ti4+ on TiO2 Nanoparticles Induced by Visible-Light Illumination

被引：28

作者：

Komaguchi, Kenji ^{[1
]}

Maruoka, Takanori ^{[1
]}

Nakano, Haruka ^{[1
]}

Imae, Ichiro ^{[1
]}

Ooyama, Yousuke ^{[1
]}

Harima, Yutaka ^{[1
]}

机构：

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

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 04期

基金：

日本学术振兴会;

关键词：

MOLECULAR-OXYGEN; PHOTOCATALYTIC DEGRADATION; TIO2(110) SURFACE; PARAMAGNETIC-RES; ANATASE SURFACE; O-2; ADSORPTION; PHOTOREDUCTION; DISSOCIATION; TEMPERATURE;

D O I：

10.1021/jp809851b

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：

Photoinduced electron transfer reactions of O-2 molecules adsorbed on the H-2-reduced surface of TiO2 (rutile) nanoparticles have been studied at 77 K by in situ ESR spectroscopy. Upon visible-light illumination, ESR signals due to O-2(-) (g(z) = 2.020) and Ti3+ appeared and then returned to the original ones by raising the temperature in the dark. The numbers of O-2(-) and Ti3+ ions formed by illumination were equal, suggesting that a reversible electron transfer between peroxo O-2(2-) species and the adjacent Ti4+ ion occurs by sub-band gap illumination of TiO2.

引用

页码：1160 / 1163

页数：4

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