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
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
收藏
页码:18 / 22
页数:5
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