泡沫镍负载纳米ZnO薄膜电极光电催化降解甲基橙研究

On the Photoelectrocatalytic Degradation of Methyl Orange by Using ZnO Film Electrode Coated on Porous Nickel

采用阴极电沉积法制备泡沫镍负载ZnO薄膜电极,以紫外灯为光源,以负载ZnO薄膜的泡沫镍为阳极,铂电极为阴极,饱和甘汞电极为参比,建立三电极的光电催化体系,以甲基橙为降解对象,考察了外加电压、甲基橙起始浓度、支持电解质浓度和薄膜掺杂对甲基橙降解率的影响.研究表明泡沫镍是光催化剂良好的载体,适当地增加电压、降低甲基橙起始浓度、增大支持电解质浓度和掺杂可以提高甲基橙的降解率.

ZnO coated on porous nickel film electrode is prepared by cathodically electrodepositing. The photoelec- trocatalytic system is set up by using UV lamp as light source, ZnO coated on nickel as anode, Pt as counter electrode and saturated calomel electrode as reference electrode, studies the effects of potential, the initial concentra- tion of methyl orange（MO） , the concentration of supporting electrolyte and doping on the degradation efficiency of MO. It is found that porous nickel is a good carrier and that increasing the potential, the concentration of supporting electrolyte or decreasing the initial concentration of MO is favorable for the degradation of MO.