文献类型：期刊文献

英文题名：Construction of bimetallic co-doped ordered mesoporous MxCey/(TiO2)(z)@SiO2 aerogel composite material and its photocatalytic performance under visible light

作者：Zhang, Guifei Tang, Shiyun Tang, Anjiang

第一作者：Zhang, Guifei

通信作者：Tang, AJ[1]

机构：[1]Guizhou Univ, Coll Chem & Chem Engn, Guiyang 550025, Guizhou, Peoples R China;[2]Guizhou Inst Technol, Guiyang 550003, Guizhou, Peoples R China

第一机构：Guizhou Univ, Coll Chem & Chem Engn, Guiyang 550025, Guizhou, Peoples R China

通信机构：corresponding author), Guizhou Inst Technol, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院;

年份：0

外文期刊名：JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000913935500001)】；

基金：The research was supported by Guizhou Provincial Science and Technology Projects (Qianke- hezhicheng [2021] Yiban 493), GIT Academic Seedling Training and Innovation Exploration Project (No. GZLGXM-11,GZLGXM-19), and Guizhou Education Department Youth Science and Technology Talents Growth Project (No. Qianjiaohe KY [2021]254).

语种：英文

外文关键词：Aerogel; Bimetallic co-doped; Ordered mesoporous materials; Photocatalytic degradation

摘要：Dye (such as Rhodamine B) is an organic pollutant, which has become a serious environmental pollution problem due to its pollution of soil, groundwater, aquatic ecosystem and biological health. In this study, bimetallic co-doped ordered mesoporous MxCey/(TiO2)(z)@SiO2 aerogel composites were prepared by sol-gel combined with atmospheric pressure drying method. The synthesized catalysts were characterized by scanning electron microscope, energy dispersive spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, N-2 adsorption techniques, fluorescence spectra, transmission electronic microscope and ultraviolet visible diffuse reflectance spectroscopy. Rhodamine B was used as a simulated organic pollutant, and the photocatalytic degradation activity of aerogel catalysts was evaluated under visible light. The results show that all the catalysts have good adsorption capacity, and the adsorption rate is up to 30-50% due to the large specific surface area of SiO2 aerogel carrier. When the metal ion is 5 mol%, the optimum doping concentration of titanium is 60 mol%. The catalysts containing Y and Zn showed the best catalytic performance, and the degradation rate reached about 98% after 180 min of photoreaction. The doping of appropriate amount of rare earth elements and transition metal elements not only contributes to light absorption and matrix adsorption, promotes the formation of hydroxyl radicals, but also reduces the band gap of the catalyst and has high photogenerated carrier transfer efficiency. Therefore, the visible light degradation performance of the catalyst is obviously improved.