CdSe/泡沫镍薄膜电极对结晶紫的光电催化降解

摘要

采用恒电位电沉积法,以泡沫镍为基底电极,制备了CdSe/泡沫镍薄膜电极,采用扫描电子显微镜、紫外可见漫反射光谱和能谱分析表征了CdSe薄膜的形貌及其组成.应用该电极研究结晶紫溶液在光电催化降解过程中的COD去除率.结果表明,以白炽灯(100 W,2只)为光源,采用电沉积30 min所得的CdSe/泡沫镍薄膜电极为工作电极,外加偏压为0.4V(vs.SCE),0.01 mol/L NaCl为电解质,光电催化降解浓度为0.001 g/L的结晶紫溶液120 min,COD去除率达到84.3％.%A CdSe/foam nickel thin film electrode was prepared by depositing the CdSe thin film on the foam nickel surface with potentiostatic method.The morphology and composition of CdSe/foam nickel thin film electrode were characterized by SEM,UV-Vis diffusive reflectance spectra ( DRS) and energy dispersive spectra (EDS).The chemical oxygen demand (COD) removal efficiency was investigated during the process of photoelectrocatalytic degradation of crystal violet.The results show that the COD removal efficiency of 0.001 g/L crystal violet can reach to 84.3% when using the CdSe/foam nickle thin film electrode as working electrode and catalyst ( deposition time is 30 min) under the following conditions; 0.01 mol/L supporting electrolyte of NaCl,anodic bias potential of 0.4 V(vs.SCE) ,irradiation for 120 min with two incandescent lamps(100 W).