A novel Ti/PbO2 electrode was synthesized through electro-codeposition technology by using dodecyl trimethyl ammonium chloride (DTAC) as an additive.Its characteristics were examined by scanning electron microscopy,X-ray diffraction,cyclic voltammetry,electrochemical impedance spectroscopy,X-ray photoelectron spectroscopy and accelerated life test etc.Electro-catalytic oxidation experiments were carried out to evaluate the effect of DTAC on the electorde's electrochemical activity.Acid red G (ARG,C18H13N3Na2O8S2,CAS number:3734-67-6) was chosen as the model contaminant due to its extensive industrial usage.After DTAC modification,the predominant phase of the electrode was still pure β-PbO2.However,DTAC could refine the electrode surface leading to a high electrode specific surface area and oxygen evolution potential (OEP,1.886V) and a low electrode film impedance (55.7 ?/cm2).The ARG electrocatalytic degradation and accelerated life tests revealed that the electrocatalytic ability and stability of the modified electrode were much higher compared to that of PbO2electrode.Among these novel electrodes,the PbO2-DTAC (0.5) exhibited the highest electrocatalytic ability for ARG degradation with a decolorization percentage of 86.8% within 60 min.Moreover,its stability was the highest with a long accelerated service life of 232.5 h,which was more than 2 times longer than that of PbO2 electrode (96 h).
李晓良, 徐浩, 延卫. 高效Ti/PbO2电极制备及对酸性红G的降解研究[J]. 中国环境科学, 2017, 37(7): 2591-2598.
LI Xiao-liang, XU-Hao, YAN-Wei. Studies on the preparation of high efficient Ti/PbO2 electrode and degradation of acid red G. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(7): 2591-2598.
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