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Photoelectrochemical degradation of Methylene Blue with beta-PbO2 electrodes driven by visible light irradiation
Li, Guoting; Yip, HoYin; Wong, Kin Hang; Hu, Chun; Qu, Jiuhui; Wong, Po Keung
2011
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
Volume23Issue:6Pages:998—1003
Abstractbeta-PbO2 electrodes were prepared by electro-deposition and characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and linear sweep voltammetry. We confirmed pure beta-PbO2 crystals were on the electrode and it had a high oxygen evolution potential. The photoactivity and photoelectrochemical (PEC) properties of the beta-PbO2 electrode were investigated under visible light irradiation (lambda > 420 nm) for the decolorization of Methylene Blue. Pseudo first-order kinetics parameter (K-app) for dye decolorization using the beta-PbO2 electrode achieved 6.71x10(-4) min(-1) under visible light irradiation, which indicated its excellent visible light-induced photoactivity. The K-app of the PEC process was as much as 1.41x10(-3) min(-1) and was 1.71 times that of visible light irradiation or electrolysis even in the presence of the beta-PbO2 electrode. A significant synergetic effect was observed in the PEC system. We also employed TiO2 modified beta-PbO2 electrodes in this test, which revealed that the TiO2 immobilized on the beta-PbO2 electrode inhibited the visible light-induced PEC efficiency despite the amount of TiO2 used for electrode preparation. The beta-PbO2 electrode was also superior to the dimensionally stable anode (Ti/Ru0.3Ti0.7O2) in visible light-induced photoactivity and PEC efficiency.
Department环境水质学国家重点实验室
KeywordPhotocatalysis Photoelectrochemical Process Visible Light Beta-pbo2 Electrode
WOS IDWOS:000292120200016
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/7133
Collection环境水质学国家重点实验室
Recommended Citation
GB/T 7714
Li, Guoting,Yip, HoYin,Wong, Kin Hang,et al. Photoelectrochemical degradation of Methylene Blue with beta-PbO2 electrodes driven by visible light irradiation[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2011,23(6):998—1003.
APA Li, Guoting,Yip, HoYin,Wong, Kin Hang,Hu, Chun,Qu, Jiuhui,&Wong, Po Keung.(2011).Photoelectrochemical degradation of Methylene Blue with beta-PbO2 electrodes driven by visible light irradiation.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,23(6),998—1003.
MLA Li, Guoting,et al."Photoelectrochemical degradation of Methylene Blue with beta-PbO2 electrodes driven by visible light irradiation".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 23.6(2011):998—1003.
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