The Ti-supported lead dioxide electrode（Ti/PdO2） consisted of a Sb2O3/SnO2 semiconductive interlayer and electrodeposited PbO2 films was prepared. The optimum ratio of Sb2O3 to SnO2 was 15%25%. Addition of NaF（0.40...The Ti-supported lead dioxide electrode（Ti/PdO2） consisted of a Sb2O3/SnO2 semiconductive interlayer and electrodeposited PbO2 films was prepared. The optimum ratio of Sb2O3 to SnO2 was 15%25%. Addition of NaF（0.40 g/L） in electroplating solution could decrease the rate of PbO2 deposition, which resulted in the formation of small crystal particles and compact PbO2 films. XRD study showed the β-form crystal of electrode. The electrode was tested in synthesis of 4-picoline acid by electro-oxidation of 4-picoline, showing good electroconductivity and stable life.展开更多
为了开发更经济有效的电化学氧化技术,制备了可在过滤模式(flow-through)下运行的新型电化学膜电极(REM),并在多孔钛板上通过模板电沉积法制备具有三维有序多孔结构的PbO2膜电极(3DEM-PbO2)。研究了传统序批式反应器(BR)和电化学过滤器(...为了开发更经济有效的电化学氧化技术,制备了可在过滤模式(flow-through)下运行的新型电化学膜电极(REM),并在多孔钛板上通过模板电沉积法制备具有三维有序多孔结构的PbO2膜电极(3DEM-PbO2)。研究了传统序批式反应器(BR)和电化学过滤器(EFR)对哌啶的处理效果,发现3DEM-PbO2在EFR中对流传质更强,氧化能力更强。还探究了不同操作参数(电流密度、反应器流速和哌啶初始浓度)对电化学降解性能的影响。3DEM-PbO2对哌啶去除效率随电流密度增大而提高,在20 m A/cm2的电流下,120 min时可达到99.9%;随水流速度增大而提高,在10 m L/s的水流速度下,180 min时可达到99.9%;随初始浓度增大而减少,在哌啶浓度为25 mg/L时,120 min可达到99.9%。因此3DEM-PbO2过滤器在处理哌啶过程中有很大的潜力。展开更多
Electrodeposited PbO2/Ti doped with Bi,Ce,Cu or Sn with an intermediate layer was prepared.The electrochemical parameters in the oxidation process of Cr2(SO4)3 were determined by steady-state polarization curve.The cu...Electrodeposited PbO2/Ti doped with Bi,Ce,Cu or Sn with an intermediate layer was prepared.The electrochemical parameters in the oxidation process of Cr2(SO4)3 were determined by steady-state polarization curve.The current efficiency of Bi-doped,Ce-doped,Cu-doped,Sn-doped and undoped PbO2/Ti in the preparation of dichromic acid by electrooxidation of chromium sulfate were investigated.The result showed Ce-doped PbO2/Ti exhibited the best electrocatalytic activity in the undoped and doped PbO2/Ti mentioned above.展开更多
文摘The Ti-supported lead dioxide electrode（Ti/PdO2） consisted of a Sb2O3/SnO2 semiconductive interlayer and electrodeposited PbO2 films was prepared. The optimum ratio of Sb2O3 to SnO2 was 15%25%. Addition of NaF（0.40 g/L） in electroplating solution could decrease the rate of PbO2 deposition, which resulted in the formation of small crystal particles and compact PbO2 films. XRD study showed the β-form crystal of electrode. The electrode was tested in synthesis of 4-picoline acid by electro-oxidation of 4-picoline, showing good electroconductivity and stable life.
文摘为了开发更经济有效的电化学氧化技术,制备了可在过滤模式(flow-through)下运行的新型电化学膜电极(REM),并在多孔钛板上通过模板电沉积法制备具有三维有序多孔结构的PbO2膜电极(3DEM-PbO2)。研究了传统序批式反应器(BR)和电化学过滤器(EFR)对哌啶的处理效果,发现3DEM-PbO2在EFR中对流传质更强,氧化能力更强。还探究了不同操作参数(电流密度、反应器流速和哌啶初始浓度)对电化学降解性能的影响。3DEM-PbO2对哌啶去除效率随电流密度增大而提高,在20 m A/cm2的电流下,120 min时可达到99.9%;随水流速度增大而提高,在10 m L/s的水流速度下,180 min时可达到99.9%;随初始浓度增大而减少,在哌啶浓度为25 mg/L时,120 min可达到99.9%。因此3DEM-PbO2过滤器在处理哌啶过程中有很大的潜力。
文摘Electrodeposited PbO2/Ti doped with Bi,Ce,Cu or Sn with an intermediate layer was prepared.The electrochemical parameters in the oxidation process of Cr2(SO4)3 were determined by steady-state polarization curve.The current efficiency of Bi-doped,Ce-doped,Cu-doped,Sn-doped and undoped PbO2/Ti in the preparation of dichromic acid by electrooxidation of chromium sulfate were investigated.The result showed Ce-doped PbO2/Ti exhibited the best electrocatalytic activity in the undoped and doped PbO2/Ti mentioned above.
