High surface area, high catalytic activity titanium dioxide aerogels prepared by solvothermal crystallization

作     者：Xian Yue Junhui Xiang Junyong Chen Huaxin Li Yunsheng Qiu Xianbo Yu Xian Yue;Junhui Xiang;Junyong Chen;Huaxin Li;Yunsheng Qiu;Xianbo Yu

作者机构：Center of Materials Science and Optoelectronics EngineeringCollege of Materials SciencesUniversity of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2020年第47卷第12期

页      面：223-230页

核心收录：

学科分类：081702[工学-化学工艺] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：supported by the National Construction Program of First-Class University and First-Class Discipline of China the Project of Novel Aerogel Materials Supported by Superel Advanced Materials Technology Co.Ltd of China 

主　　题：TiO2 aerogel Non-supercritical drying Low temperature crystallization Photocatalysis 

摘      要：Titanium dioxide has been considered to be one of the most effective and environmental friendly photocatalytic *** has been widely used in photocatalytic degradation of various *** we known,an anatase crystal form typically obtained by high temperature heat treatment(600℃),usually shows higher catalytic *** order to further improve the catalytic efficiency,we prepared TiO2 with a non-supercritical drying method to form a high specific surface area aerogel structure,along with an increased active contact ***,with the inevitable of internal pores collapse in the process of high temperature crystallization,a large amount of porous structure and specific surface area is ***,to enhance the photocatalytic activity of titania,we propose a synergistic strategy to fabricate a porous titania structure with a high specific surface *** was crystallized at a lower temperature(120℃) in a low-boiling solvent(ethanol,acetone,etc.).The lattice structure was identified by X-ray diffractometry;specific surface area(over 300 m2/g) of our sample was also measured through BET test;in the subsequent photocatalytic degradation test,the photocatalytic degradation efficiency of fabricated TiO2 is proved to be more excellent than P25 *** a freeze-drying/mild crystallization method,a high-specific surface area and high catalytic activity TiO2 aerogel was *** study provides some insights in the combining of crystallization and high specific surface area of titanium dioxide photocatalysis.