制备金属离子掺杂二氧化钛纳米线及其可见光催化  

Preparation of Metal Ion Doped Titania Nanowires and Their Visible Light Photocatalytic Activity

作　　者：刘祥志[1] 徐明霞[1] 李顺[1] 张念星[1] 

机构地区：[1]天津大学材料学院,先进陶瓷与加工技术教育部重点实验室,天津300072

出　　处：《稀有金属材料与工程》2008年第A01期391-394,共4页Rare Metal Materials and Engineering

基　　金：教育部博士点基金资助项目(资助号20030056001)

摘　　要：采用二次阳极氧化工艺制备了高度有序的多孔氧化铝模板,通过模板法与溶胶-电泳沉积法结合的组装技术,合成了具有高比表面积的糖葫芦状M/TiO_2(M=La^(3+),Fe^(3+))纳米线阵列体系。采用SEM对样品进行了表征,测试结果表明:TiO_2纳米线阵列保持了模板的有序性,直径分布均匀一致,为70 nm左右,长为15μm左右,取向性很好。以甲基橙为目标降解物,在可见光下考察该金属离子掺杂纳米线的催化活性,结果显示此纳米线阵列体系具有非常优良的可见光催化性能,与同条件下制备的薄膜试样相比可见光催化活性可以提高4倍以上。A two-step anodizing process was used to prepare highly ordered porous anodic alumina template （PAA）. The template method was combined with the sol-electrophoresis deposition to prepare the M/TiO2 （M=La^3＋, Fe^3＋） nanowire arrays with the candied haw morphology. The titania nano-arrays has a high specific surface area. The samples were characterized by scanning electron microscopy （SEM）. The arrays of the nanowires followed the regularity of the template. The nanowires have uniform diameters around 70 nm and the length of 15 μm and they were well aligned. The visible photocatalytic activity of the （M=La^3＋, Fe^3＋） titania nanowire arrays was studied by degradation of methyl orange solution, which showed the excellent visible light photocatalytic activity, about four times higher than the normal TiO2/glass films.

关 键 词：溶胶-电泳沉积法 M/TiO2纳米线阵列体系 可见光催化性能 

分 类 号：O614.411[理学—无机化学]