新型泡沫镍阴极材料的制备及在电芬顿中的应用

Preparation of a New Foam Nickel Cathode and Its Application in ElectroFenton System

采用浸渍法制备壳聚糖铁修饰泡沫镍极板,通过循环伏安曲线与XPS分析电极的电化学特性和表面形态,并研究其作为电芬顿阴极材料对罗丹明B脱色的最佳工艺条件。同时以罗丹明B脱色率为考察指标,利用单因素(p H值、电流、掺铁量)分析方法确定因素水平,再通过正交试验获得最佳工艺条件。结果表明,修饰后的泡沫镍阴极具有良好的电催化性能以及抗化学腐蚀能力;当初始p H值为2、电流为20 m A、掺铁量为0.15 g/m L时,修饰后的泡沫镍阴极对罗丹明B的脱色率较高。

A chitosan-iron modified foam nickel plate was prepared by impregnation method, and its electrochemical characteristics and surface morphology were analyzed by cyclic voltammetrycurve and XPS method. Then, the plate was applied to be a cathode to explore the optimum conditions for decolori- zation of rhodamine B （RhB） in electro-Fenton system. Taking RhB decolorization rate as the target, the factor level was determined by single factor （pH, current and iron content） analysis method, and the op- timum technological conditions were obtained by orthogonal test. The results showed that the modified cathode had good electrocatalytic performance and resistance to chemical corrosion. Furthermore, when the initial pH was 2, the applied current was 20 mA and the iron content was 0.15 g/mL, the modified foam nickel cathode had higher decolorization rate of RhB.