不同晶型TiO_(2)催化臭氧氧化的性能研究  

Catalytic properties of different crystalline TiO_(2)for ozone oxidation

作　　者：李连鑫 张润泽 刘志鹏 钟莲[1] 李世迁 Li Lianxin;Zhang Runze;Liu Zhipeng;Zhong Lian;Li Shiqian(College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao 266100;Modern Facility Agriculture Engineering Research Center of Fujian Universities,College of Materials and Environmental Engineering,Fujian Polytechnic Normal University,Fuqing,350300)

机构地区：[1]中国海洋大学化学化工学院,青岛266100 [2]福建职业技术师范大学材料与环境工程学院,福建高校现代设施农业工程研究中心,福清350300

出　　处：《化工新型材料》2024年第4期184-189,196,共7页New Chemical Materials

基　　金：国家重点研发计划(2019YFC0312602);现代设施农业福建省高等学校工程研究中心(福建技术师范学院)开放课题(G2-KF2008)资助。

摘　　要：采用溶胶-凝胶法,利用不同温度热处理制备不同晶体结构的TiO_(2)。以苯酚为目标污染物,研究了其催化臭氧氧化性能。结果表明,当催化剂质量相同时,锐钛矿型TiO_(2)因比表面积最大、表面羟基数量最多表现出最佳的臭氧催化活性;当对催化剂的表面积进行归一化时,表面羟基密度及活性氧含量随着TiO_(2)中金红石型含量的增大而增加,这表明金红石型的暴露面具有比锐钛矿型更高的内在活性。The nanocrystalline TiO_(2)with different crystal structures were prepared by sol-gel method with heat treatment at various temperatures.The phenol was employed as the target pollutant to evaluate the catalytic ozonation activity of the samples.The results showed that when the catalysts were of the same mass,the anatase-rich TiO_(2)materials exhibited the best ozone catalytic activity due to the largest specific surface area and the largest number of surface hydroxyls.When normalized with respect to the surface area of the catalysts,the surface hydroxyl density and reactive oxygen content increased with the increase of rutile type content of TiO_(2),indicating that the exposed facets of rutile possessed an intrinsic higher activity than that of the anatase.

关 键 词：二氧化钛 金红石型 锐钛矿型 催化臭氧氧化 苯酚 

分 类 号：X783[环境科学与工程—环境工程]