A novel high gravity multi-concentric cylinder electrodes-rotating bed(MCCE-RB) was developed for the electrocatalytic degradation of phenol wastewater in order to enhance the mass transfer with the self-made RuO_2-Ir...A novel high gravity multi-concentric cylinder electrodes-rotating bed(MCCE-RB) was developed for the electrocatalytic degradation of phenol wastewater in order to enhance the mass transfer with the self-made RuO_2-IrO_2-SnO_2/Ti anodes. The influences of electric current density, inlet liquid circulation flowrate, high gravity factor, sodium chloride concentration,and initial pH value on phenol degradation efficiency were investigated, with the optimal operating conditions determined. The results showed that under the optimal operating conditions covering a current density of 35 mA/cm^2, an inlet liquid circulation flowrate of 48 L/h, a high gravity factor of 20, a sodium chloride concentration of 8.5 g/L, an initial pH value of 6.5, a reaction time of 100 min, and an initial phenol concentration of 500 mg/L, the efficiency for removal of phenol reached 99.7%, which was improved by 10.4% as compared to that achieved in the normal gravity field. The tendency regarding the change in efficiency for removal of phenol, total organic carbon(TOC), and chemical oxygen demand(COD)over time was studied. The intermediates and degradation pathway of phenol were deduced by high performance liquid chromatography(HPLC).展开更多
通过第一性原理,结合采用密度泛函理论对金红石型Sn x Ru1-x O2(0≤x≤1)涂层结构进行了计算,并通过局域密度近似方法对不同比例的Sn x Ru1-x O2固溶体晶体结构进行优化。发现Sn的增加对Ru-Sn氧化物的点阵常数产生影响;并获得RuSn氧化...通过第一性原理,结合采用密度泛函理论对金红石型Sn x Ru1-x O2(0≤x≤1)涂层结构进行了计算,并通过局域密度近似方法对不同比例的Sn x Ru1-x O2固溶体晶体结构进行优化。发现Sn的增加对Ru-Sn氧化物的点阵常数产生影响;并获得RuSn氧化物晶胞体积V与固溶度x之间的拟合公式。结果表明,该拟合公式与实验数据吻合较好。展开更多
Poorly crystalline Ru0.4Sn0.6O2 solid solution with size about 2 nm coated on Ti substrate was prepared by thermal decomposition at 260°C. The electrodes were characterized by X-ray diffraction (XRD), scanning el...Poorly crystalline Ru0.4Sn0.6O2 solid solution with size about 2 nm coated on Ti substrate was prepared by thermal decomposition at 260°C. The electrodes were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) for structural and morphological studies. The Capacitance properties of the electrodes were tested by cyclic voltammetry and charge-discharge tests. The results show that the electrodes have mud-cracks structure with cracks 0.2 μm in width. The electrode has stable electrochemical capacitor properties with a maximum specific capacitance of 648 F/g within a scan potential window –0.1 - 1.0 V in 0.5 M H2SO4 electrolyte solution.展开更多
基金financially supported by the Nature Science Foundation of China (Grant No.U1610106)the Nature Science Foundation of China (Grant No.21703208)
文摘A novel high gravity multi-concentric cylinder electrodes-rotating bed(MCCE-RB) was developed for the electrocatalytic degradation of phenol wastewater in order to enhance the mass transfer with the self-made RuO_2-IrO_2-SnO_2/Ti anodes. The influences of electric current density, inlet liquid circulation flowrate, high gravity factor, sodium chloride concentration,and initial pH value on phenol degradation efficiency were investigated, with the optimal operating conditions determined. The results showed that under the optimal operating conditions covering a current density of 35 mA/cm^2, an inlet liquid circulation flowrate of 48 L/h, a high gravity factor of 20, a sodium chloride concentration of 8.5 g/L, an initial pH value of 6.5, a reaction time of 100 min, and an initial phenol concentration of 500 mg/L, the efficiency for removal of phenol reached 99.7%, which was improved by 10.4% as compared to that achieved in the normal gravity field. The tendency regarding the change in efficiency for removal of phenol, total organic carbon(TOC), and chemical oxygen demand(COD)over time was studied. The intermediates and degradation pathway of phenol were deduced by high performance liquid chromatography(HPLC).
文摘通过第一性原理,结合采用密度泛函理论对金红石型Sn x Ru1-x O2(0≤x≤1)涂层结构进行了计算,并通过局域密度近似方法对不同比例的Sn x Ru1-x O2固溶体晶体结构进行优化。发现Sn的增加对Ru-Sn氧化物的点阵常数产生影响;并获得RuSn氧化物晶胞体积V与固溶度x之间的拟合公式。结果表明,该拟合公式与实验数据吻合较好。
文摘Poorly crystalline Ru0.4Sn0.6O2 solid solution with size about 2 nm coated on Ti substrate was prepared by thermal decomposition at 260°C. The electrodes were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) for structural and morphological studies. The Capacitance properties of the electrodes were tested by cyclic voltammetry and charge-discharge tests. The results show that the electrodes have mud-cracks structure with cracks 0.2 μm in width. The electrode has stable electrochemical capacitor properties with a maximum specific capacitance of 648 F/g within a scan potential window –0.1 - 1.0 V in 0.5 M H2SO4 electrolyte solution.
