高温热解ZIF-8制备系列Ce-ZnO及其光催化性能研究

Preparation of Ce-ZnO catalysts by high-temperature pyrolysis of ZIF-8 and analysis on the photocatalytic properties

以2-甲基咪唑、醋酸锌与硝酸铈为原料,在常温下制备了系列掺入Ce的ZIF-8金属有机框架材料,然后通过高温焙烧制得表面有缺陷的Ce-ZnO微纳米材料。利用XRD、TG、SEM等对制备的Ce-ZnO进行了表征,并以高压汞灯为光源,以有机染料罗丹明B为目标污染物,考察了Ce-ZnO的光催化活性。结果表明,相比于ZIF-8高温热解制得的ZnO,Ce-ZnO具有更好的光催化活性和稳定性,当Ce掺杂量为1.0%时,其性能最佳。

A series of Ce-doped ZIF-8 metal-organic framework materials were prepared from 2-methylimidazole,zinc acetate,and cerium(Ⅲ)nitrate at normal temperature,and then were roasted under high-temperature to obtain the surface defected Ce-ZnO micro-nanometer materials.The Ce-ZnO catalysts were characterized by XRD,TG,SEM and EDS.High pressure mercury lamp as light source,the photocatalytic activities of Ce-ZnO catalysts were investi-gated by the degradation of the soluble organic dye rhodamine B.Compared with ZnO catalyst prepared by high-tem-perature pyrolysis of ZIF-8,Ce-ZnO catalyst had better photocatalytic activity and stability.Moreover,the best per-formance of Ce-ZnO catalyst was found at the Ce doping amount of 1.0%.