TiO2/SiO2气凝胶的非超临界干燥法制备及其对吡啶降解的光催化活性

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TiO₂/SiO₂气凝胶的非超临界干燥法制备及其对吡啶降解的光催化活性

甘礼华; 王玉栋; 郝志显; 徐子颉; 陈龙武

Department of Chemistry, Tongji University, Shanghai 200092, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2005-12-28 发布日期:2005-12-28
通讯作者: 甘礼华

Preparation of TiO2/SiO2 Aerogels by Non-supercritical Drying Method and Their Photocatalytic Activity for Degradation of Pyridine

GAN Lihua; WANG Yudong; HAO Zhixian; XU Zijie; CHEN Longwu

Department of Chemistry, Tongji University, Shanghai 200092, China

Received:1900-01-01 Revised:1900-01-01 Online:2005-12-28 Published:2005-12-28
Contact: GAN Lihua

摘要/Abstract

摘要： TiO2/SiO2 aerogels with different molar ratio of SiO2/TiO2 were prepared via non-supercritical method using tetrabutyl titanate and silica sols as raw materials. The samples were characterized by TEM, SEM, BET, IR, XRD and so on. The results indicate that the BET surface area of TiO2/SiO2 aerogels calcined at 550℃ which consisted of anatase structure of TiO2 with narrow distribution pores of 5-25 nm is as high as 357.89 m^2·g^-1. For the photocatallytic degradation of pyridine, the catalytic activities of TiO2/SiO2 aerogels are much higher than that of TiO2 powder. The photocatalytic activity of TiO2/SiO2 aerogels calcined at 800℃ is the optimum. The higher the content of SiO2, the higher the photocatalytic activity of TiO2/SiO2 aerogels. The cost for preparation of the aerogels is greatly reduced by using non-supercritical drying method, and the aerogels are hopefully applied in the treatment of industrial waste water such as coking effluent treatment.

关键词: TiO2/SiO2气凝胶;非超临界干燥法;制备;吡啶;降解;光催化活性

Abstract: TiO2/SiO2 aerogels with different molar ratio of SiO2/TiO2 were prepared via non-supercritical method using tetrabutyl titanate and silica sols as raw materials. The samples were characterized by TEM, SEM, BET, IR, XRD and so on. The results indicate that the BET surface area of TiO2/SiO2 aerogels calcined at 550℃ which consisted of anatase structure of TiO2 with narrow distribution pores of 5-25 nm is as high as 357.89 m^2·g^-1. For the photocatallytic degradation of pyridine, the catalytic activities of TiO2/SiO2 aerogels are much higher than that of TiO2 powder. The photocatalytic activity of TiO2/SiO2 aerogels calcined at 800℃ is the optimum. The higher the content of SiO2, the higher the photocatalytic activity of TiO2/SiO2 aerogels. The cost for preparation of the aerogels is greatly reduced by using non-supercritical drying method, and the aerogels are hopefully applied in the treatment of industrial waste water such as coking effluent treatment.

Key words: TiO2/SiO2 aerogels, photocatalysis, pyridine, degradation

甘礼华,王玉栋,郝志显,徐子颉,陈龙武. TiO₂/SiO₂气凝胶的非超临界干燥法制备及其对吡啶降解的光催化活性[J]. CIESC Journal.

GAN Lihua, WANG Yudong, HAO Zhixian, XU Zijie, CHEN Longwu. Preparation of TiO2/SiO2 Aerogels by Non-supercritical Drying Method and Their Photocatalytic Activity for Degradation of Pyridine[J]. .

TiO₂/SiO₂气凝胶的非超临界干燥法制备及其对吡啶降解的光催化活性

Preparation of TiO2/SiO2 Aerogels by Non-supercritical Drying Method and Their Photocatalytic Activity for Degradation of Pyridine

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