Synthesis of fibrous TiO2 from layered protonic tetratitanate by a hydrothermal soft chemical process

被引：17

作者：

Jing, XZ ^{[1
]}

Li, YX ^{[1
]}

Yang, QB ^{[1
]}

Yin, QR ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Cerams & Superfine, Shanghai 200050, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2004年 / 110卷 / 01期

关键词：

titanium oxides; whisker; layered protonic tetratitanate; hydrothermal; phase transitions;

D O I：

10.1016/j.mseb.2004.01.018

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fibrous TiO2 (anatase) was prepared by a hydrothermal soft chemical process using H(2)Ti(4)O(9)(.)0.25H(2)O as a template precursor. The influence of reaction time, temperature and precursor concentration on the phase formation, morphology and crystal-axis orientation were studied. The results have shown that fibrous anatase can be obtained at 220 degreesC for 24 h with the precursor concentrations in the range of 0.025-0.100 M, and that particles had diameters of 0.2-1 mum and lengths of 2-20 mum. The fibrous TiO2 anatase prepared by this method showed a high orientation along a-axis direction. X-ray diffractometer (XRD) and SEM analyses have indicated that in situ transformation mechanism dominated the entire hydrothermal process but dissolution-recrystallization also occurred on the surface of the particles. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：18 / 22

页数：5

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