The electrochemical oxidation of chlorimuron-ethyl on metry. The electrochemical behaviour of the electrode in a sodium Ti/SnO2-Sb2O5/PbO2 electrode was studied by cyclic voltamsulfate solution and in the mixture solu...The electrochemical oxidation of chlorimuron-ethyl on metry. The electrochemical behaviour of the electrode in a sodium Ti/SnO2-Sb2O5/PbO2 electrode was studied by cyclic voltamsulfate solution and in the mixture solution of sodium sulfate and chlorimuron-ethyl was studied. The experimental results of cyclic voltammetry show that the acidic medium was suitable for the efficient electrochemical oxidation of chlorimuron-ethyl. Some electro-generated reagent was formed in the electrolysis process and chlorimuron-ethyl could be oxidized by the electro-generated reagent. A Ti/SnO2-Sb2O5/PbO2 electrode was used as the anode and the electrolysis experiment was carried out under the optimized conditions. The electrolysis process was monitored by UV-Vis spectrometry and high performance liquid chromatography（HPLC）, and the chemical oxygen demand（COD） was determined by the potassium dichromate method. The mechanism of chlorimuron-ethyl to be oxided was studied primarily by the cyclic voltammetry and UV-Vis spectrometry. The results of electrolysis experiment demonstrate the possibility of the electrode to be used as an anode for the electrochemical treatment of chlorimuron-ethyl contained in waste water.展开更多
The conditions for the preparation of PbO 2 modified Pt rotation disc electrode in solutions containing HClO 4 and Pb(II) were studied, and the morphology and composition of the obtained PbO 2 film were characteriz...The conditions for the preparation of PbO 2 modified Pt rotation disc electrode in solutions containing HClO 4 and Pb(II) were studied, and the morphology and composition of the obtained PbO 2 film were characterized by SEM and XRD techniques, respectively. The results show that the modification process of PbO 2 is dependent on the rotation velocity of the electrode and the concentrations of HClO 4 and Pb(II). And it was observed that the obtained PbO 2 film was rutile β PbO 2 structure. At a certain positive potential, HO· and HO 2· radicals can be generated on the surface of the modified PbO 2/Pt electrode and then oxidize phenols. According to the change of the responding anodic current, the determination of phenols was realizable and good results were obtained.展开更多
基金Supported by the Science and Technology Foundation of the Education Department of Liaoning Province,China (No.2009A557)
文摘The electrochemical oxidation of chlorimuron-ethyl on metry. The electrochemical behaviour of the electrode in a sodium Ti/SnO2-Sb2O5/PbO2 electrode was studied by cyclic voltamsulfate solution and in the mixture solution of sodium sulfate and chlorimuron-ethyl was studied. The experimental results of cyclic voltammetry show that the acidic medium was suitable for the efficient electrochemical oxidation of chlorimuron-ethyl. Some electro-generated reagent was formed in the electrolysis process and chlorimuron-ethyl could be oxidized by the electro-generated reagent. A Ti/SnO2-Sb2O5/PbO2 electrode was used as the anode and the electrolysis experiment was carried out under the optimized conditions. The electrolysis process was monitored by UV-Vis spectrometry and high performance liquid chromatography（HPLC）, and the chemical oxygen demand（COD） was determined by the potassium dichromate method. The mechanism of chlorimuron-ethyl to be oxided was studied primarily by the cyclic voltammetry and UV-Vis spectrometry. The results of electrolysis experiment demonstrate the possibility of the electrode to be used as an anode for the electrochemical treatment of chlorimuron-ethyl contained in waste water.
基金ProjectsupportedbytheKeyTechnologyResearchandDevelopmentProgramofChina’sTenthFive YearPlan (No .2 0 0 1BA2 10A0 4)
文摘The conditions for the preparation of PbO 2 modified Pt rotation disc electrode in solutions containing HClO 4 and Pb(II) were studied, and the morphology and composition of the obtained PbO 2 film were characterized by SEM and XRD techniques, respectively. The results show that the modification process of PbO 2 is dependent on the rotation velocity of the electrode and the concentrations of HClO 4 and Pb(II). And it was observed that the obtained PbO 2 film was rutile β PbO 2 structure. At a certain positive potential, HO· and HO 2· radicals can be generated on the surface of the modified PbO 2/Pt electrode and then oxidize phenols. According to the change of the responding anodic current, the determination of phenols was realizable and good results were obtained.
