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锐钛矿型TiO2/SiO2复合氧化物的制备

苑美荣, 任素霞, 郭玉鹏, 赵 旭, 刘艳华   

  1. 吉林大学 化学学院, 长春 130021
  • 收稿日期:2007-01-10 修回日期:1900-01-01 出版日期:2007-09-26 发布日期:2007-09-26
  • 通讯作者: 刘艳华

Preparation and Characterization of TiO2/SiO2 Composites

YUAN Meirong, REN Suxia, GUO Yupeng, ZHAO Xu, LIU Yanhua   

  1. College of Chemistry, Jilin University, Changchun 130021, China
  • Received:2007-01-10 Revised:1900-01-01 Online:2007-09-26 Published:2007-09-26
  • Contact: LIU Yanhua

摘要: 以硅灰石为硅源、 硫酸钛为钛源, 在未添加任何表面活性剂的制备条件下得到较高比表面积的多孔锐钛矿型TiO2/SiO2复合氧化物.反应过程中生成微溶于水的CaSO4, 在复合物孔隙的形成中起重要作用. 利用XRD,TEM,N2吸附和脱附对复合物的微观结构和化学组成进行了表征.

关键词: 二氧化钛, 二氧化硅, 硅灰石, 多孔, 硫酸钙

Abstract: TiO2-SiO2 composites with large specific surface a reas (up to 308.6 m2/g) were synthesized from wollastonite and titanium sulfate in the absence of any surfactants under finely tuned several experimental conditions. Calcium sulphate, as a faintly soluble substance in water, plays an important role in the formation of pores in the nanocomposites. The microstructure and chemical composition of nanocomposites were characterized by means of X-ray diffractometry, transmission electron microscopy and N2 adsorption and desorptionanalysis. The as prepared titanium dioxidesilicon dioxide nanocomposites with high specific surface areas and wellcrystallized anatase contents could be used as an efficient photocatalyst.

Key words: TiO2, SiO2, wollastonite, porous, calcium sulfate

中图分类号: 

  • O614.1