阳离子交换法制备CuSe/ZnSe微米球及光催化性能研究

Basic ion exchange method for synthesis of CuSe/ZnSe microspheres and photocatalytic property

基于抗生素的污染现状和防控需求,利用水热法和阳离子交换法,成功地将Cu添加到ZnSe,制备了1~4μm的球状CuSe/ZnSe复合光催化剂。利用XRD、SEM、XPS和BET等对产物进行了表征,并以环丙沙星(CIP)为主要降解目标物,考察了其在可见光下的光催化性能。结果表明,当Cu添加量为10%时,降解效果最佳,对CIP的降解效率达到了75.5%,重复利用4次的降解效果仍大于60%,且降解过程符合伪一级动力学模型。在降解过程中,主要活性物种为超氧自由基,其在催化降解过程中起到了主要作用。研究可为扩宽ZnSe在光催化降解环境中抗生素的应用方面提供一定的技术参考。

Based on the current situation of antibiotic pollution and the demand of prevention and control,this paper prepared 1~4μm microspherical CuSe/ZnSe composite photocatalysts by adding CUto ZnSe through the hydrothermal and basic ion exchange methods.The sample was characterized by XRD,SEM,XPS and BET,and the photocatalytic properties of the as-obtained CuSe/ZnSe under visible light were investigated with ciprofloxacin(CIP)as the degradation target.The results showed that the best degradation effect was achieved and the degradation efficiency of CIP reached to 75.5%when the CUaddition was up to 10%.Moreover,the degradation effect of reuse for four cycles was still over 60%,and the degradation process was in accordance with the pseudOprimary kinetic model.In the degradation process,the main active species was superoxide radical,which played a key role in the catalytic degradation process.It would provide technical support for broadening the photodegradation application of ZnSe for the removal of antibiotics in the environment.