掺Ce纳米ZnO光催化剂的结构表征及催化性能

Characterization and Catalytic Properties of Ce-doped nano-ZnO Photocatalyst

为了提高ZnO微纳米材料对有机染料的光催化降解性能,以ZIF-8为中间体制备了ZnO,并对其进行稀土Ce掺杂,利用X射线粉末衍射(XRD)、傅里叶变换红外光谱(FT-IR)、扫描电镜及能谱(SEM-EDX)、透射电镜(TEM)、固体紫外光谱(UV-Vis)对光催化剂进行了系列表征,探究了掺Ce比例、光源类型对光催化降解甲基橙的影响。结果表明:掺杂适量的Ce可以提高ZnO的光催化活性;掺Ce质量为Zn质量的1%(ZnO-1%Ce)时,ZnO的光催化活性最高;ZnO-1%Ce在实验所用太阳光下的光催化性能优于在紫外光下。

In order to improve the photocatalytic degradation of organic dyes by ZnO micro/nano materials,ZnO was prepared by using ZIF-8 as an intermediate,and it was doped with rare earth Ce.The photocatalysts were characterized by XRD,FT-IR,SEMEDX,TEM and UV-Vis spectroscopy.The effects of Ce ratio and light source on photocatalytic degradation of methyl orange were investigated.The results showed that doping an appropriate amount of Ce can increase the photocatalytic activity of ZnO,and the photocatalytic activity of ZnO was best when the Ce ratio was 1%( Ce/Zn mass%).The photocatalytic performance of ZnO-1%Ce under the sunlight used in the experiment was better than that under ultraviolet light.