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唐长斌.铝掺杂改性钛基PbO2电极性能研究[J].稀有金属材料与工程(英文),2019,48(6):1909~1915.[Tang Changbin.Properties of Al-doped titanium based PbO2 electrodes[J].Rare Metal Materials and Engineering,2019,48(6):1909~1915.]
Properties of Al-doped titanium based PbO2 electrodes
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Received:January 01, 2018  Revised:March 01, 2018
DOI:
Key words: Aluminum doping  PbO2 electrodes  electrochemical oxidation  phenol degradation
Foundation item:国家自然科学基金资助(51278407,51408468);榆林市科技计划项目(项目号2015cxy-14-01)。
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Tang Changbin  
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Abstract:
      Al-doped Ti/PbO2 electrodes were prepared by using anodic deposition from solution containing Al (III) cation. Influence of Al-doping on the physicochemical properties of modified PbO2 coating electrodes was characterized by surface roughometer, scanning electron microscope (SEM), X-ray diffraction (XRD), linear polarization and electrochemical impedance spectroscopy (EIS) techniques, and accelerated life test. The electrocatalytic oxidation degradation behavior of Al-doping PbO2 electrodes for phenol simulation wastewater was compared. These results show that PbO2 coatings with smaller size, uniform and dense surface, lower surface roughness and less nodulation defect are obtained when a certain amount of Al3+was added into the electrodeposition solution. Al-doping results in increased oxygen evolution potential, improved charge transfer capacity and enhanced electrocatalytic performance for PbO2 electrodes. Nevertheless, those properties do not uniformly varied with increase of Al3+additive amount. When deposited 3h in the bath solution contain 3mM Al3+, the electrode prepared has maximum oxygen evolution potential 2.09 V, excellent electrical conductivity, the best electrocatalytic property and the longest accelerated life of 460 h, which is increased by 100h compared with that of the unmodified electrode. The Al-doped Ti/PbO2 electrodes show good electrochemical oxidation degradation capacity for phenol simulated wastewater. After treatment 180 min the removal rate of phenol is up to 93.6%, and the maximum removal rate of COD can reach 73.6%.