TiO2／Ni PECO体系降解DMP的动力学和光电协同作用研究  

Kinetic and photo-electro cooperation effect on degrading dimethy phthalate in TiO_2/Ni PECO system

作　　者：李悦[1] 王鹏[1] 赵宝秀[1,2] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,城市水资源与水环境国家重点实验室,哈尔滨150090 [2]清华大学环境与工程系,北京100084

出　　处：《环境工程学报》2009年第2期293-297,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(50678045)

摘　　要：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(dimethyphthalate,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。A TiO2/Ni photoeleetrocatalytic 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 photoelectroeatalytic degradation kinetics and photo-electro cooperation effect. The result shows that degrada- tion of DMP accords with pseudo first-order kinetics law. When initial concentration of DMP was kept constant, factors influencing the photoeleetroeatalytic 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.

关 键 词：镍基二氧化钛光电极 光电催化氧化 邻苯二甲酸二甲酯 动力学 光电协同作用 

分 类 号：X703[环境科学与工程—环境工程]