文献类型：期刊文献

英文题名：Preparation of Highly Stable and Effective N-Doped TiO2@SiO2 Aerogel Catalyst for Degradation of Organic Pollutants by Visible Light Catalysis

作者：Tang, Shiyun Ran, Jingyu Guo, Junjiang Tang, Anjiang

第一作者：唐石云

通信作者：Tang, SY[1];Tang, SY[2]|[1444088b958b0033dcb66]唐石云;

机构：[1]Guizhou Inst Technol, Coll Chem Engn, Guiyang 550003, Peoples R China;[2]Engn Technol Res Ctr Fluorine Silicon Mat, Guiyang 550003, Peoples R China

第一机构：贵州理工学院化学工程学院

通信机构：corresponding author), Guizhou Inst Technol, Coll Chem Engn, Guiyang 550003, Peoples R China;corresponding author), Engn Technol Res Ctr Fluorine Silicon Mat, Guiyang 550003, Peoples R China.|贵州理工学院化学工程学院;贵州理工学院;

年份：2019

卷号：2019

外文期刊名：JOURNAL OF CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000499219100005)】；

基金：This research was supported by the National Natural Science Foundation of China (No. 2176605), S&T Plan Project Approving in Guizhou (Nos. Qiankehe LH Zi[2016] 7104, Qiankehe SY Zi[2014] 3058, and Qiankehe Jichu[2019] 1135), Natural Science Foundation of Guizhou Provincial Department of Education (Qiankehe KY Zi[2016]014), Science and Technology Services for Rural Industrial Revolution and Poverty Alleviation and Undergraduate Training Programs for Innovation and Entrepreneurship.

语种：英文

摘要：To obtain high stable and effective TiO2 photocatalyst, nano-N-doped TiO2@SiO2 (TiO2-xNx@SiO2, 0 <= x <= 2) composite aerogels were synthesized by the sol-gel method combined with supercritical drying and direct oxidation process. The adsorption/photocatalytic degradation efficiency of TiO2-xNx@SiO2 aerogels was evaluated by the degradation of RhB in aqueous solution under visible light irradiation. The physiochemical properties of the aerogels were examined by XRD, FT-IR, TEM, SEM, TG/DTA, and BET methods. It was found that the specific surface areas of all TiO2-xNx@SiO2 samples exceeded 700 m(2)/g and exhibited a honeycomb porous structure with fine particulate morphology. Photocatalytic activity tests show that the 500-TiO2@SiO2 composite aerogel exhibits the best adsorption/photocatalytic degradation rate for RhB, which obtained about 80% of the degradation rate in 30 min under visible light and over 95% after 120 min. On the one hand, the SiO2 aerogels can significantly inhibit the phase transition of TiO2, and the nano TiO2 can be highly dispersed in the SiO2 aerogels; On the other hand, if the oxidation temperature is selected properly, the N-doped TiO2-xNx@SiO2 aerogel can be obtained by simple TiN@SiO2 aerogel oxidation.