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.
Brillas E, Martínez-Huitle CA. Decontamination of wastewaters containing synthetic organic dyes by electrochemical methods. An updated review[J]. Applied Catalysis B:Environmental, 2015, 166-167:603-643.
Aquino J M, Rocha-Filho R C, Ruotolo L A M, et al. Electrochemical degradation of a real textile wastewater using β-PbO2 and DSA® anodes[J]. Chemical Engineering Journal, 2014,251:138-145.
Liu Y, Liu H. Comparative studies on the electrocatalytic properties of modified PbO2 anodes[J]. Electrochimica Acta, 2008,53(16):5077-5083.
Zhao G, Zhang Y, Lei Y, et al. Fabrication and Electrochemical Treatment Application of A Novel Lead Dioxide Anode with Superhydrophobic Surfaces, High Oxygen Evolution Potential, and Oxidation Capability[J]. Environment Science Technology, 2014,44:1754-1757.
Li X, Xu H, Yan W. Preparation and characterizaiton of PbO2 electrode modified with Polyvinyl alcohol[J]. RSC Advances, 2016,6:82024-82032.
Hu Z, Zhou M, Zhou L, et al. Effect of matrix on the electrochemical characteristics of TiO2 nanotube array-based PbO2 electrode for pollutant degradation[J]. Environmental science and pollution research, 2014,21(14):8476-8484.
Duan X, Li J, Liu W, et al. Fabrication and characterization of a novel PbO2 electrode with a CNT interlayer[J]. RSC Advances, 2016,6(34):28927-28936.
Chen J, Xia Y, Dai Q. Electrochemical degradation of chloramphenicol with a novel Al doped PbO2 electrode:Performance, kinetics and degradation mechanism[J]. Electrochimica Acta, 2015,165:277-287.
Li X, Xu H, Yan W. Fabrication and characterization of PbO2 electrode modified with polyvinylidene fluoride (PVDF)[J]. Applied Surface Science, 2016,389:278-286.
Duan X, Ma F, Yuan Z, et al. Lauryl benzene sulfonic acid sodium-carbon nanotube-modified PbO2 electrode for the degradation of 4-chlorophenol[J]. Electrochimica Acta, 2012,76:333-343.
Ghaemi M, Ghafouri E, Neshati J. Influence of the nonionic surfactant Triton X-100on electrocrystallization and electrochemical performance of lead dioxide electrode[J]. Journal of Power Sources, 2006,157(1):550-562.
Xu H, Guo W, Wu J, et al. Preparation and characterization of titanium-based PbO2 electrodes modified by ethylene glycol[J]. RSC Advances, 2016,6(9):7610-7617.
Zhang L, Xu L, He J, et al. Preparation of Ti/SnO2-Sb electrodes modified by carbon nanotube for anodic oxidation of dye wastewater and combination with nanofiltration[J]. Electrochimica Acta, 2014,117:192-201.
Shao D, Yan W, Li X, et al. Fe3O4/Sb-SnO2 Granules Loaded on Ti/Sb-SnO2 Electrode Shell by Magnetic Force:Good Recyclability and High Electro-oxidation Performance[J]. ACS Sustainable Chemistry & Engineering, 2015,3(8):1777-1785.
Duan Y, Wen Q, Chen Y, et al. Preparation and characterization of TiN-doped Ti/SnO2-Sb electrode by dip coating for Orange Ⅱ decolorization[J]. Applied Surface Science, 2014,320:746-755.
Yang S, Feng Y, Wan J, et al. Effect of CeO2 addition on the structure and activity of RuO2/γ-Al2O3 catalyst[J]. Applied Surface Science, 2005,246(1-3):222-228.
Lin S, Chen C, Chang D. Catalytic wet air oxidation of phenol by various CeO2 catalysts[J]. Water Research, 2002,36:3009-3014.