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 secondary pollution caused by modification of an electrode due to doping of harmful materials has long been a big concern.In this study,an environmentally friendly material,conductive carbon black,was adopted for ...The secondary pollution caused by modification of an electrode due to doping of harmful materials has long been a big concern.In this study,an environmentally friendly material,conductive carbon black,was adopted for modification of lead dioxide electrode(Pb02).It was observed that the as-prepared conductive carbon black modified electrode(C-PbO2)exhibited an enhanced electrocatalytical performance and more stable structure than a pristine Pb02 electrode,and the removal efficiency of metronidazole(MNZ)and COD by a 1.0%C-Pb02 electrode at optimal conditions was increased by 24.66%and 7.01%,respectively.Results revealed that the electrochemical degradation of MNZ wastewater followed pseudo-first-order kinetics.This intimates that the presence of conductive carbon black could improve the current efficiency,promote the generation of hydroxyl radicals,and accelerate the removal of MNZ through oxidation.In addition,MNZ degradation pathways through a C-Pb02 electrode were proposed based on the identified intermediates.To promote the electrode to treat antibiotic wastewater,optimal experimental conditions were predicted through the Box-Behnken design(BBD)method.The results of this study suggest that a C-Pb02 electrode may represent a promising functional material to pretreat antibiotic wastewaters.展开更多
Despite the high specific capacities,the practical application of transition metal oxides as the lithium ion battery(LIB)anode is hindered by their low cycling stability,severe polarization,low initial coulombic effic...Despite the high specific capacities,the practical application of transition metal oxides as the lithium ion battery(LIB)anode is hindered by their low cycling stability,severe polarization,low initial coulombic efficiency,etc.Here,we report the synthesis of the NiO/Ni2N nanocomposite thin film by reactive magnetron sputtering with a Ni metal target in an atmosphere of 1 vol.% O2 and 99 vol.%N2.The existence of homogeneously dispersed nano Ni2N phase not only improves charge transfer kinetics,but also contributes to the one-off formation of a stable solid electrolyte interphase(SEI).In comparison with the NiO electrode,the NiO/Ni2N electrode exhibits significantly enhanced cycling stability with retention rate of 98.8%(85.6%for the NiO electrode)after 50 cycles,initial coulombic efficiency of 76.6%(65.0%for the NiO electrode)and rate capability with 515.3 mA·h·g^−1(340.1 mA·h·g^−1 for the NiO electrode)at 1.6 A·g^−1.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the National Natural Science Foundation of China(Grant No.51968031)the National Key Research and Development Program of China(Grant No.2018YFC-1900301).
文摘The secondary pollution caused by modification of an electrode due to doping of harmful materials has long been a big concern.In this study,an environmentally friendly material,conductive carbon black,was adopted for modification of lead dioxide electrode(Pb02).It was observed that the as-prepared conductive carbon black modified electrode(C-PbO2)exhibited an enhanced electrocatalytical performance and more stable structure than a pristine Pb02 electrode,and the removal efficiency of metronidazole(MNZ)and COD by a 1.0%C-Pb02 electrode at optimal conditions was increased by 24.66%and 7.01%,respectively.Results revealed that the electrochemical degradation of MNZ wastewater followed pseudo-first-order kinetics.This intimates that the presence of conductive carbon black could improve the current efficiency,promote the generation of hydroxyl radicals,and accelerate the removal of MNZ through oxidation.In addition,MNZ degradation pathways through a C-Pb02 electrode were proposed based on the identified intermediates.To promote the electrode to treat antibiotic wastewater,optimal experimental conditions were predicted through the Box-Behnken design(BBD)method.The results of this study suggest that a C-Pb02 electrode may represent a promising functional material to pretreat antibiotic wastewaters.
基金The authors acknowledge the support by the National Natural Science Foundation of China(Grant No.51767021)the Jiangxi Yunjia High Tech Co.,Ltd.(Grant No.738010128).
文摘Despite the high specific capacities,the practical application of transition metal oxides as the lithium ion battery(LIB)anode is hindered by their low cycling stability,severe polarization,low initial coulombic efficiency,etc.Here,we report the synthesis of the NiO/Ni2N nanocomposite thin film by reactive magnetron sputtering with a Ni metal target in an atmosphere of 1 vol.% O2 and 99 vol.%N2.The existence of homogeneously dispersed nano Ni2N phase not only improves charge transfer kinetics,but also contributes to the one-off formation of a stable solid electrolyte interphase(SEI).In comparison with the NiO electrode,the NiO/Ni2N electrode exhibits significantly enhanced cycling stability with retention rate of 98.8%(85.6%for the NiO electrode)after 50 cycles,initial coulombic efficiency of 76.6%(65.0%for the NiO electrode)and rate capability with 515.3 mA·h·g^−1(340.1 mA·h·g^−1 for the NiO electrode)at 1.6 A·g^−1.
