Cd_(1-x)Zn_xS的制备及光催化性能研究

Preparation and photocatalytic activity of Cd_(1-x)Zn_xS

以聚乙烯吡咯烷酮(PVP)作为包覆剂,通过共沉淀法成功合成了不同配合比的硫锌镉(Cd_(1-x)Zn_xS)材料。利用扫描电子显微镜(SEM)、X射线衍射(XRD)和红外光谱(FT-IR)等手段对其形貌、结构和光学性质进行了表征,并研究了制得的材料对亚甲基蓝和罗丹明B的光催化降解性能和重复使用率。结果表明,Cd_(0.75)Zn_(0.25)S材料具有较好的光催化性能,在光照75min条件下,Cd_(0.75)Zn_(0.25)S对亚甲基蓝和罗丹明B的降解率分别达到60%和70%。Cd_(0.75)Zn_(0.25)S重复使用5次,对亚甲基蓝的降解率是原降解率的80%以上。

Zinc cadmium sulfide（Cd_（1-x）Zn_xS）nanomaterials with different ratio were successfully synthesized by co-precipitation method used polyvinylpyrrolidone（PVP）as coatingagent.The morphology,structure and optical characteristics of materials were characterized by scanning electron microscopy（SEM）,X-ray diffraction（XRD）and fourier transform infrared spectroscopy（FT-IR）.The photocatalytic degradation property and the repetition rate of prepared materials to methylene blue and rhodamine B were studied.The results showed that Cd_（0.75）Zn_（0.25）S had better photocatalytic activity.The degradation rate of Cd_（0.75）Zn_（0.25）S to methylene blue and rhodamine B reached 60% and 70%respectively under light irradiation for 75 min.The degradation rate of methylene blue was more than 80% of original degradation rate when Cd_（0.75）Zn_（0.25）S was repeated use for 5 times.