纳米锐钛矿TiO2及负载金催化剂的制备与催化性能  

Preparation and Catalytic Performance of Nano-anatase Titania and Supported Gold Catalysts

作　　者：程玉红[1] 周婷[2] 何璇[2] 曹会勤[2] 郭杰[2] 高秋菊[1] 赵春霞[1] 马小东[2] 

机构地区：[1]天津工程职业技术学院石油与化学工程系,天津300280 [2]南开大学环境科学与工程学院,环境污染过程与基准教育部重点实验室,天津市城市生态环境修复与污染防治重点实验室,天津300071

出　　处：《材料导报》2012年第14期25-28,共4页Materials Reports

基　　金：国家自然科学基金(20977052;21177066);天津市自然科学基金(11JCYBJC05100)

摘　　要：通过简单的水解-沉淀法制备了纳米TiO2,考察了反应条件对其粒径和晶型的影响。结果表明制备小粒径锐钛矿TiO2的有利条件为:倒加法;Ti(OBu)4与C2H5OH、H2O与C2H5OH和Ti(OBu)4与H2O的体积比分别为1/3、1/4和1/1;pH=7和400℃焙烧。沉积-沉淀法制备的Au/TiO2催化剂催化CO氧化结果表明,催化剂的活性受焙烧温度影响很大,200℃焙烧的催化剂具有最好的催化活性。Nano titania was synthesized by a simple approach, hydrolyzation-precipitation method. The effects of preparation conditions on particle size and crystalline structure of titania were studied. The optimum conditions to prepare nano-anatase titania with small particle size were converse addition method, V[Ti （OBu）4 ]/V（C2 H5 OH）= 1/3, V（Hz O）/V（C2 H5 OH） = 1/4, V[-Ti（OBu） 4 ]/V（H2O） = 1/1, pH= 7 and calcination of 400~C. The gold/titania （anatase） catalysts for low-temperature CO oxidation were prepared by the deposition-precipitation method. The activity was markedly affected by the calaination temperature and the catalyst calcined at 200℃ showed the best catalytic performance.

关 键 词：纳米 锐钛矿TIO2 Au/TiO2催化剂低温CO氧化 

分 类 号：TQ134[化学工程—无机化工]