纳米TiO_2催化臭氧化降解水中草酸  

Degradation of Oxalic Acid by Catalytic Ozonation with Nano-TiO_2

作　　者：吴铭[1] 操时荣 

机构地区：[1]浙江工业大学生环学院,浙江杭州310014

出　　处：《广东化工》2014年第11期174-174,178,共2页Guangdong Chemical Industry

摘　　要：本实验以钛酸四丁酯为前驱物,乙醇和正己烷作为晶形导向剂,通过水热法合成不同晶形的TiO2催化剂。催化剂的结构特性采用X射线衍射(XRD)来表征。催化剂的催化活性通过对水中草酸晶形催化臭氧化降解来进行评估;通过研究叔丁醇对催化剂臭氧化反应的影响,证明反应遵循羟基自由基(HO·)反应机理。In the present work, the TiO2 catalysts were synthesized through a hydrothermal method using tetrabutyl titanate as the precursor, n-hexane and ethanol as the shape controlling agent. The structural properties of the catalyst is characterized by X-ray diffraction, The catalytic activity of the samples was evaluated by degradation of oxalic acid in aqueous solution in the presence of ozone. It was also observed that both ozonation and catalytic ozonation were significantly influenced by tert-butyl alcohol, which testified that TiO2 catalyzed ozonation of nitrobenzene follows a radical-type mechanism.

关 键 词：二氧化钛 草酸 臭氧 

分 类 号：TQ[化学工程]