An ultra-low hydrolysis sol-gel route for titanosilicate xerogels and their characterization

被引：57

作者：

Fernandez, Toney ^{[1
]}

Jose, Gijo ^{[1
]}

Mathew, Siby ^{[1
]}

Rejikumar, P. R. ^{[1
]}

Unnikrishnan, N., V ^{[1
]}

机构：

[1] Mahatma Gandhi Univ, Sch Pure & Appl Phys, Kottayam 686560, Kerala, India

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2007年 / 41卷 / 02期

关键词：

SiO2-TiO2; xerogels; sol-gel process; TiO2; nanocrystals;

D O I：

10.1007/s10971-006-0522-x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this work TiO2-SiO2 xerogels were prepared through an ultra low hydrolysis method using titanium and silicon alkoxide. The samples were heat treated to 500 degrees C. The xerogels were characterized using TGA/DTA, FTIR, XRD and TEM. The samples showed the formation of Si-O-Ti bridges by its characteristic vibration within 925-960 cm(-1) range. Si-O-Si bond angles were calculated using the central force network model. The TiO2 in all the samples crystallized on heat treatment to 500 degrees C. The crystallite size calculated using the Scherer formula from the XRD was verified from the Transmission Electron Micrograph. Samples heat treated to 350 degrees C remained amorphous and hence could be used as hosts for biomaterials and organic optical materials.

引用

页码：163 / 168

页数：6

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