CeO2/TiO2异质结纳米花的制备及光催化性能研究

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CeO2/TiO2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CeO2/TiO2异质结纳米花表现了优异的催化活性,在60 min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.

Preparation and Photocatalytic of CeO2/TiO2 Heterostructure Nanoflower

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 are about 98% degradation of methyl orange is degraded within 60 min.The enhanced photocatalytic activity may come from the special heterostructure.