TiO2/Ni PECO体系降解DMP的动力学和光电协同作用研究

以采用微波辅助法制备的TiO₂/Ni光电极为阳极，纤维状石墨毡材料(graphite felt,GF)为阴极，饱和甘汞电极(saturated calomel electrode, SCE)为参比电极建立TiO₂/Ni 光电催化氧化（PECO）体系。以邻苯二甲酸二甲酯（dimethy phthalate,DMP）为目标物，研究其光电催化降解反应动力学和光电协同作用。结果显示：DMP的降解符合拟一级动力学规律；当DMP初始浓度一定时，影响DMP光电催化降解速率的因素由强到弱依次为：催化剂有效面积，紫外光强度，曝氧速率，外加偏转电压等。实验证明本体系中光电之间具有协同作用。

Kinetic and photo-electro cooperation effect on degrading dimethy phthalate in TiO2 /Ni PECO system

A TiO₂ /Ni photoelectrocatalytic oxdition (PECO) system was established with TiO₂/Ni photoelectrode prepared by microwave assisted method as anode, graphite felt(GF) as cathode and saturated calomel electrode (SCE)as reference electrode. DMP (dimethy phthalate) was used as target compound to investigate the photoelectrocatalytic degradation kinetics and photo electro cooperation effect. The result shows that degradation of DMP accords with pseudo first order kinetics law. When initial concentration of DMP was kept constant, factors influencing the photoelectrocatalytic degradation rate were obtained, which were, from strong to weak, effective area of TiO₂/Ni photoelectrode, UV light intensity, oxygenation rate and external deflection voltage. Photoelectric had a synergistic effect on the degradation of DMP.