Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第13卷    第3期    总第54期    2003年6月

[PDF全文下载]    [Flash在线阅读]    

    

文章编号:1004-0609(2003)03-0788-05
单分散纳米TiO2光催化剂的水解-溶胶制备法
阎建辉1,2, 黄可龙1, 司士辉1, 刘素琴1

(1. 中南大学 功能材料化学研究所, 长沙 410083;
2. 岳阳师范学院 化学化工系, 岳阳 414000
)

摘 要: 以Ti(SO4)2 为原料, 在一定温度下直接水解、 胶溶、 加入晶种、 熟化, 制备出单分散性、 热稳定性良好、 平均粒径在22nm左右、 比表面积在80m2/g以上的TiO2纳米微粒。 研究了Ti(SO4)2 浓度、 水解时间及晶种对纳米微粒粒径的影响。 对样品进行了TG-DTA, XRD和SEM分析。 结果表明: 样品经真空冷冻干燥后, TiO2粉体主要为锐钛矿型,且随焙烧时间增加和温度升高, 其金红石型含量显著增多, 粉体粒径也有一定增大, 但在不同的温度区间粒径增长速率有较大的区别。

 

关键词: 水解-溶胶法; 纳米TiO2; 光催化剂

Preparation of photocatalytic activity nanosized TiO2 by hydrolysis-sol method
YAN Jian-hui1,2, HUANG Ke-long1,
SI Shi-hui1, LIU Su-qin1

1. The Chemical Institute of Functional Material,
Central South University, Changsha 410083, China; 
2. Department of Chemistry and Chemical Engineering, 
Yueyang Normal University, Yueyang 414000, China

Abstract:Nanosized TiO2 particle was prepared by direct hydrolysis of Ti(SO4)2 at a certain temperature, colloidal sol, addition of crystal seeds and ageing. The particle is of good single dispersion and thermal stability, and its diameter is about 22nm, specific surface is above 80m2/g. The concentration of Ti(SO4)2, hydrolysis time and addition of crystal seeds have a large influence on particle diameter. The particle was investigated by DTA-TG, XRD and SEM analysis. The results show that the TiO2 particle is mainly anatase after being dried by refrigeration under vacuum. With the increase of calcining time and the rise of temperature the content of rutile increases and the diameter of the particle also becomes big. The TiO2 particle calcined at 700℃ for 2h is mainly rutile, and the diameter is enlarged observably.

 

Key words: hydrolysis-sol; nanosized TiO2; photoca

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com