紫外光协同CuO-TiO2/Al2O3三维粒子电极电催化降解罗丹明B

摘要

The CuO-TiO2/Al2O3 particle electrode was prepared and characterized.On this basis,Rhodamine B in water was degraded by ultraviolet-three dimension particle electrode synergistic electro-catalysis system.The affacting factors,reaction kinetics and mechanism of the degradation process were investigated.The characterization results indicated that the particle electrode had fine surface structure and effective catalytic component.The experimental results showed that:The decolorization rate of Rhodamine B solution was up to 96.29％ under the conditions of Rhodamine B mass concentration 20 mg/L,cell voltage 15 V,current 0.3 A,solution pH 3.0,aeration rate 1.5 L/min and Fe2+ concentration 0.5 mmol/L;The degradation reaction followed the first order kinetic equation with 0.060 mg/(L · min)of reaction rate constant;The H2O2 concentration in solution was reduced by 30％ due to H2O2 decomposition promoted by ultraviolet irradiation.%自制了CuO-TiO2/Al2O3粒子电极,对其进行了表征.在此基础上构建了紫外光协同三维粒子电极电催化体系降解水中的罗丹明B,考察了降解过程的影响因素、动力学及机理.表征结果显示,粒子电极具有良好的表面结构及有效催化成分.实验结果表明:在罗丹明B质量浓度20 mg/L、槽电压15V、电流0.3 A、溶液pH 3.0、曝气量1.5 L/min、Fe2+投加量0.5 mmol/L的条件下反应60 min,脱色率达96.29％;反应过程符合一级动力学方程,反应速率常数为0.060 mg/(L·min);紫外光的加入使溶液中H2O2的浓度降低约30％,促进了H2O2的分解.