| LI Xiao-le,MA Ke-you,SU Xiao-li,ZHANG Xiao-jie,ZHANG Lin.Electro-catalytic Oxidation of 2-chlorophenol on a Ultrasonic Doped Bi-PbO2 / Ti in Aqueous Solution[J],45(2):151-155 |
| Electro-catalytic Oxidation of 2-chlorophenol on a Ultrasonic Doped Bi-PbO2 / Ti in Aqueous Solution |
| Received:October 26, 2015 Revised:February 20, 2016 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2016.02.024 |
| KeyWord:ultrasonic-associated electro-deposition lead dioxide electrode bismuth 2-chlorphenol degradation electro-catalysis |
| Author | Institution |
| LI Xiao-le |
Department of Metallurgical and Chemical Engineering, Jiyuan Vocational and Technical Collage, Jiyuan , China |
| MA Ke-you |
Department of Metallurgical and Chemical Engineering, Jiyuan Vocational and Technical Collage, Jiyuan , China |
| SU Xiao-li |
Department of Metallurgical and Chemical Engineering, Jiyuan Vocational and Technical Collage, Jiyuan , China |
| ZHANG Xiao-jie |
1. Department of Metallurgical and Chemical Engineering, Jiyuan Vocational and Technical Collage, Jiyuan , China;2. Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou , China |
| ZHANG Lin |
Department of Metallurgical and Chemical Engineering, Jiyuan Vocational and Technical Collage, Jiyuan , China |
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| Abstract: |
| Objective To improve the service life, electrocatalytic activity, electrocatalytic selectivity of the Ti-base lead dioxide electrode for the target pollutant of 2-chlorophenol. Methods In this paper, four different types of Ti-base lead dioxide eletrodes including PbO2 / SnO2+Sb2O3 / Ti,Bi-PbO2 / SnO2+Sb2O3 / Ti,PbO2(ultrasonic) / SnO2 +Sb2O3 / Ti and Bi-PbO2(ultrasonic) / SnO2 + Sb2O3 / Ti were prepared by electro-deposition and ultrasonic-associated electro-deposition using Ti web with an SnO2 +Sb2O3 layer obtained by spreading and oxidating polymeric precursor as anodes. The composition of the electrolyte and operating conditions were as follows. The mixed solution of NaF and Pb(NO3)2 or the mixed solution of NaF, Pb(NO3)2 and Bi(NO3)3 was used. The pH of the mixed solution was 2, the coating current density was 0. 04 A / cm2 , the temperature of coating solution was 60 ℃ , and the time of electro-deposition was 1 hour. The accelerated service life was determined in sulfuric acid solution. Their electric catalysis and electro catalytic selectivity were analyzed by static anodic polarization curves, the effect of electrolysing 2-chlorphenol solution was tested using the electro-oxidative degradation of 2-chlorophenol as the model response, the morphology and crystal phase of surface coating was characterized by scanning electron microscopy and X-ray diffraction. Results The accelerated life of Bi-PbO2(ul-trasonic) / SnO2 +Sb2 O3 / Ti increased by 54% than PbO2 / SnO2 +Sb2 O3 / Ti. Compared to PbO2 / SnO2 +Sb2 O3 / Ti, the 2-chlorophe-nol removal rate had a 19% increase after 4 hours of electrolysis using Bi-PbO2(ultrasonic) / SnO2 +Sb2 O3 / Ti as an anode, and the electrolyzer voltage had a 7% reduction. The static anodic polarization curves and the electro-oxidative degradation test of 2-chloro-phenol solution showed the same results. Conclusion Ultrasonic environment in the process of preparation of electrode and doped Bi have a beneficial effect on the performance. Compared with non-doped electrode, the bismuth-doped electrode's electro-catalytic property and electro-catalytic selectivity for the degradation of 2-chlorphenol is better, and its specific area is larger, its apparent catalytic activity is better, its life is longer by ultrasonic-associated electro-deposition than by electro-deposition. |
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