Quantitative study of F center in high-surface-area anatase titania nanoparticles prepared by MOCVD

被引：21

作者：

Sun, YJ

Egawa, T

Shao, CL

Zhang, LY

Yao, X

机构：

[1] Nagoya Inst Technol, Res Ctr Nanodevice & Syst, Showa Ku, Nagoya, Aichi 4668555, Japan

[2] Tongji Univ, Funct Mat Res Lab, Shanghai 200092, Peoples R China

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2004年 / 65卷 / 11期

关键词：

MOCVD; nanoparticles; titania; EPR; F center;

D O I：

10.1016/j.jpcs.2004.05.006

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The concentration of F center in high-surface-area anatase titania nanoparticles prepared by MOCVD are studied with electron paramagnetic resonance measurements at different time and different temperatures. The results show that the kinetics of F center is dominated by surface process rather than bulk process. With increasing temperature, two temperature dependent regions for the concentration of F center can be clearly identified. The starting temperature and activation energy of the surface process are determined to be 357.4 K and 0.085 eV, respectively. The reaction of F center with oxygen is of zero order and the concentration of F center can be well described by [GRAPHICS] (C) 2004 Elsevier Ltd. All rights reserved.

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页码：1793 / 1797

页数：5

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