CeO_2/TiO_2异质结纳米花的制备及光催化性能研究  

Preparation and Photocatalytic of CeO_2/TiO_2 Heterostructure Nanoflower

作　　者：秦雷[1] 许海峰[1] 

机构地区：[1]宿州学院机械与电子工程学院,宿州234000

出　　处：《人工晶体学报》2017年第6期1112-1116,共5页Journal of Synthetic Crystals

基　　金：安徽省教育厅教学研究项目(2016jyxm1027);宿州学院教授博士项目(2015JB06)

摘　　要：异质结催化剂以其优异的光电性能、光催化性能及在降解有机污染物上的实用性,吸引了广大研究者的注意。采用水热法,制备了CeO_2/TiO_2异质结纳米花,利用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、和紫外-可见光吸收(UV-vis)等分析手段对制备的样品形貌和结构进行表征,并以甲基橙为目标污染物,考察了样品的光催化性能,并且对光催化降解的机理进行了分析。我们发现,这种异质结构将其紫外-可见光吸收边由紫外光区域拓宽到可见光区域,从而提高光响应范围。研究表明CeO_2/TiO_2异质结纳米花表现了优异的催化活性,在60min内降解了98%的甲基橙,这主要是源于其特殊的异质结构,能增强光催化活性。Due to the remarkable optoelectronic, photocatalytic properties and promising practical application in photodegrading environmental pollutions, heterostructure semiconductor nanomaterials have attracted wide attention. CeO2/TiO2 heterostructure nanoflower composites were prepared by hydrothermal method. Structure and morphology of the heterostructure semiconductor nanomaterials were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, transmission electron microscope （TEM）, and ultraviolet-visible spectrum （UV-vis）. It was found that the CeO2/TiO2 heterostructure nanoflower nanocomposites show excellent catalytic activity. There orange is degraded within 60 min. The enhanced photocatalytic heterostructure. are about 98% degradation of methyl activity may come from the special heterostmcture.

关 键 词：异质结构 CeO2/TiO2 纳米催化剂 光降解 水热法 

分 类 号：O782.1[理学—晶体学] TQ050.425[化学工程]