Vapor-thermal preparation of highly crystallized TiO2 powder and its photocatalytic activity

被引：35

作者：

Su, Yaorong

Yu, Jiaguo

Lin, Jun

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

[2] Renmin Univ China, Dept Chem, Beijing 100872, Peoples R China

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2007年 / 180卷 / 07期

关键词：

titania; vapor thermal; photocatalytic activity; mesoporous; nanocrystalline;

D O I：

10.1016/j.jssc.2007.04.028

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Nanocrystalline anatase TiO2 powder photocatalysts were synthesized by a vapor-thermal method using tetrabutyl titanate as precursor at a temperature range from 120 to 200 degrees C. The as-synthesized products were characterized by X-ray diffraction, N-2 adsorption-desorption measurement, transmission electron microscopy, high resolution transmission electron microscopy, Fourier transform infrared spectra, Raman spectra, and their photocatalytic activity was evaluated by photocatalytic oxidation decomposition of acetone in air. The results showed that reaction temperature greatly affected the microstructures and photocatalytic activity of the samples. With increasing reaction temperature and time, the average crystalline size of TiO2 particles increased and their crystallization enhanced, while the specific surface area of the products decreased. The TiO2 powders obtained at a temperature range from 150 to 200 degrees C for 10h showed good photocatalytic activity and were greatly higher than that of Degussa P-25. (c) 2007 Elsevier Inc. All rights reserved.

引用

页码：2080 / 2087

页数：8

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