溶胶-乳化-凝胶法制备TiO2纳米粉体的晶化过程

硅酸盐通报 , 2007, 26(2): 287-290. doi: 10.3969/j.issn.1001-1625.2007.02.015

溶胶-乳化-凝胶法制备TiO2纳米粉体的晶化过程

肖凡平 ^1, , 张世英 ^2, , 陈振华 ^3, , 吴洛义 ^4, , 余取民 ^5,

1.湖南大学材料科学与工程学院,长沙,410082

2.湖南大学材料科学与工程学院,长沙,410082;长沙学院生物工程与环境科学系,长沙,410003

3.湖南大学材料科学与工程学院,长沙,410082

4.湖南大学材料科学与工程学院,长沙,410082

5.长沙学院生物工程与环境科学系,长沙,410003

关键词： TiO2 , 微乳 , 晶化 , 热处理

The Crystallization Process of TiO2 Nanopowder Prepared by Sol-Emulsion-Gel Method

将乳化技术与溶胶-凝胶方法相结合,通过"微乳反应器"来控制钛酸丁酯的水解速率和凝胶化过程,从而制备出分散性好的TiO2纳米粉体.通过X射线衍射(XRD),热重-差热(TG-DSC)和傅立叶变换红外光谱(FT-IR)对制备的TiO2纳米粉体在热处理过程的物化变化进行分析,并用扫描电镜(SEM)对其形貌和颗粒大小进行表征.结果表明:随着热处理温度的升高,TiO2粉体晶型从无定型,经过锐钛矿最终转变成金红石.在热处理过程中,TiO2纳米粉体的失重率达到38%.制备的TiO2纳米粉体分散性好,纳米颗粒平均尺寸15 nm.

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材料期刊网

溶胶-乳化-凝胶法制备TiO2纳米粉体的晶化过程

The Crystallization Process of TiO2 Nanopowder Prepared by Sol-Emulsion-Gel Method

参考文献