An improvement on sol-gel method for preparing ultrafine and crystallized titania powder

被引：106

作者：

Liu, XH ^{[1
]}

Yang, J ^{[1
]}

Wang, L ^{[1
]}

Yang, XJ ^{[1
]}

Lu, LD ^{[1
]}

Wang, X ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Mat Chem Lab, Nanjing 210094, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2000年 / 289卷 / 1-2期

关键词：

low temperature; redissolving; linking; hydrolysis and pyrolysis;

D O I：

10.1016/S0921-5093(00)00901-1

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

TiO2 nanoparticles were prepared using a sol-gel method with inorganotitanates and polyethylene glycol (PEG). However, the way TiO2 particles were obtained from the dry gel was not by calcining but by redissolving the dry gel which had been treated at 100 degrees C, thereby releasing the particles. The TiO2 powder prepared in this manner was ultra-fine (similar to 4 nm) and crystallized (anatase phase) merely by being exposed to 100 degrees C while inside the gel. It was supposed that this low temperature crystallization of TiO2 results from the special structure of the gel which formed through the linking of TiO(NO3)(2). H2O with PEG chains by a hydrogen bond. This preparation method also has an advantage in environmental protection. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：241 / 245

页数：5

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