可见光响应微晶TiO_2的低温制备与表征  

On Low-temperature Preparation & Representation of Visible Lights Responding to TiO_2 Microcrystal

作　　者：何登良[1,2] 蒲俊宏[1] 郑英[1] 张舰[1] 寇将[1] 

机构地区：[1]绵阳师范学院化学与化学工程学院,四川绵阳621000 [2]先进建筑材料四川省重点实验室(西南科技大学),四川绵阳621000

出　　处：《绵阳师范学院学报》2012年第8期43-46,50,共5页Journal of Mianyang Teachers＇ College

基　　金：国家自然科学基金(51004066);先进建筑材料四川省重点实验室开放项目(09zxxk03)

摘　　要：以钛酸四丁酯为原料,在高浓度的硝酸溶液条件下,采用低温水解方法合成微晶TiO2光催化剂,分别采用XRD、FITR、SEM、TEM、PL等测试技术对催化剂进行了表征。实验结果表明:在低温85℃条件下,加入65 mL硝酸可以制得结构和形貌不同的TiO2微晶,该材料在225 nm波长诱导下表现出420 nm的发光性能。所得TiO2微晶60 min之内可在太阳光照射条件下将25 mg/L的甲基橙完全分解。The photo -catalyst, ce -doped TiO2 microcrystal with different Ta doping concentrations synthe- tized by using tetrabutyl titanate as raw material in low temperature, was represented with some measuring and tes- ting techniques, such as XRD, FITR, SEM, TEM, PL, and DRS. At the same time, the degradation perform- ance of microcrystalline TiO2 on methyl orange was studied in ordinary sunlight conditions. The result of this ex- periment shows that microcrystalline TiO2 at 85℃, Ce doped into TiO2 lattice causes changes in TiO2 crystal struc- ture. Meanwhile, the light absorption of catalyst can be extending to the visible light. When the concentration of Ce is 0.75% , the methyl orange can be degraded within 60 minutes under visible radiation.

关 键 词：可见光响应 微晶TiO2 低温制备 表征 

分 类 号：TQ312.24[化学工程—高聚物工业]