混晶纳米TiO_2光催化性能及混晶相间的机理研究  

Studies on the photocatalytic activity and synergism among phases of the mixed crystal nano-TiO_2

作　　者：张慧[1] 王洪涛[1,2] 金凤[1] 胡向阳[1] 

机构地区：[1]阜阳师范学院化学化工学院,安徽阜阳236041 [2]苏州大学材料与化学化工学院,江苏苏州215123

出　　处：《阜阳师范学院学报（自然科学版）》2011年第1期53-56,共4页Journal of Fuyang Normal University(Natural Science)

基　　金：安徽青年教师"资助计划"(2007jq1142);阜阳师范学院科学研究项目(2008LQ15;2009FSKJ01ZD;2010CXY07)资助

摘　　要：采用溶胶-凝胶法制备混晶纳米TiO2和珍珠岩负载纳米TiO2混晶催化剂,以XRD、SEM、UV-vis DRS和电化学方法对样品进行表征。结果表明,晶型调节剂的含量对混晶中金红石和锐钛矿相TiO2的比率有较大的影响;对于负载型纳米TiO2催化剂,混晶比影响催化剂的光催化降解效率。并讨论了混晶的光催化机理。Mixed phase nano-TiO2 and mixed phase nano-TiO2/EP were prepared by Sol-gel method and the content of rutile in the mixed phase was controllable by doping hexylene glycol（HG）.The catalysts are characterized by XRD,UV-visible DRS and electrochemistry method.The results show that the ratio of R/A phase in mixed crystal is fixed by regulator HG.It is different in degradation effect of dye when the ratio of mixed crystal in supported nano-TiO2 is changed.This article also investgates the photocatalytic mechanism of mixed phase.

关 键 词：纳米TIO2 混晶 光催化 混晶效应 

分 类 号：O643[理学—物理化学]