催化学报

催化学报 ›› 2006, Vol. 27 ›› Issue (4): 291-293.

• 研究快讯 •    下一篇

非钛醇盐溶胶-凝胶法制备高光活性纳米晶TiO2气凝胶

陈麟,朱建,杨俊,刘永梅,曹勇,贺鹤勇,戴维林,范康年   

  1. 复旦大学化学系, 上海市分子催化与功能材料重点实验室, 上海 200433
  • 收稿日期:2006-04-25 出版日期:2006-04-25 发布日期:1984-12-26

A Highly Photoactive Nanocrystalline TiO2 Aerogel Prepared by a Non-Alkoxide Sol-Gel Method

CHEN Lin, ZHU Jian, YANG Jun, LIU Yongmei, CAO Yong, HE Heyong, DAI Weilin, FAN Kangnian   

  1. Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China
  • Received:2006-04-25 Online:2006-04-25 Published:1984-12-26

PDF

675

被引次数

10

摘要： 以TiCl4为前驱体,采用环氧丙烷快速成胶法合成了具有高光催化活性的纳米晶TiO2气凝胶,利用X射线衍射、N2物理吸附和透射电镜等手段考察了H2O/TiCl4摩尔比和热处理等制备参数对TiO2气凝胶织构性质的影响,并以苯酚的光催化降解为模型反应评价了样品的光催化活性. 结果表明, H2O/TiCl4摩尔比为3时体系的成胶过程较为缓慢,制备的纳米晶TiO2气凝胶样品具有最小的晶粒尺寸及最大的比表面积和孔容,并且具有最佳的光催化活性.

关键词: 二氧化钛, 气凝胶, 苯酚, 降解, 环氧丙烷, 溶胶-凝胶

Abstract: The nanocrystalline TiO2 aerogel was prepared by a novel epoxide-mediated non-alkoxide sol-gel method, and the catalyst was characterized by X-ray diffraction, N2 adsorption and transmission electron microscopy. The influence of the preparation conditions on the textural properties of the TiO2 aerogels was investigated, and the catalyst activity was tested by using phenol degradation as the model reaction. When H2O/TiCl4 molar ratio is 3, the prepared TiO2 aerogel has the smallest crystallite size and the biggest surface area, and the catalyst shows the highest activity for phenol degradation.

Key words: titanium dioxide, aerogel, phenol, degradation, propylene epoxide, sol-gel