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	Photoelectrocatalytic degradation of 4-chlorophenol at Bi2WO6 nanoflake film electrode under visible light irradiation
	Zhao, Xu ; Xu, Tongguang ; Yao, Wenqing ; Zhang, Chuan ; Zhu, Yongfa
	2010-05-06 ; 2010-05-06
关键词	Bi2WO6 nanoflake film photoelectrocatalytic degradation 4-CP visible light ELECTROCHEMICALLY ASSISTED PHOTOCATALYSIS NANOSHEET CRYSTALLITES IMPEDANCE SPECTROSCOPY SYNERGETIC DEGRADATION WATER OXIDATION OXIDE ACID ELECTROOXIDATION NM Chemistry, Physical Engineering, Environmental Engineering, Chemical
中文摘要	To efficiently utilize the solar light and improve the photooxidation technique for wastewater purification, a new type of photoelectrode, visible light responsive Bi2WO6 nanoflake film, was covered onto the indium-tin oxide glass substrate via the electrostatic self-assembly deposition. The photocatalytic oxidation, electro-oxidation, and photoelectrocatalytic (PEC) oxidation of 4-chlorophenol (4-CP) in aqueous solution using the film electrode were investigated and compared under visible light irradiation (lambda > 400 nm). The experimental results demonstrated that 4-CP could be degraded by the nanotlake film under visible light irradiation or by applying a bias potential greater than 0.8 V. Based on X-ray photoelectron spectra (XPS) analysis of the electrode after electrochemical reaction, the electropolymerization was suggested to occur in the electro-oxidation process. Furthermore, degradation efficiency of 4-CP was largely increased by combined electro-oxidation and photocatalysis. And, it is the largest at the bias potential of 2.0 V. The characteristics of the PEC degradation of 4-CP were also investigated by electrochemical impedance spectroscopy (EIS). It is shown from the EIS that the PEC degradation appears to be a simple reaction on the electrode surface, suggesting that only one step of charge transfer is involved in the electrode process. The total organic carbon analysis indicated that 4-CP could be efficiently mineralized during the PEC process. (c) 2006 Elsevier B.V. All rights reserved.
语种	英语 ; 英语
出版者	ELSEVIER SCIENCE BV ; AMSTERDAM ; PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/13639]
专题	清华大学
推荐引用方式 GB/T 7714	Zhao, Xu,Xu, Tongguang,Yao, Wenqing,et al. Photoelectrocatalytic degradation of 4-chlorophenol at Bi2WO6 nanoflake film electrode under visible light irradiation[J],2010, 2010.
APA	Zhao, Xu,Xu, Tongguang,Yao, Wenqing,Zhang, Chuan,&Zhu, Yongfa.(2010).Photoelectrocatalytic degradation of 4-chlorophenol at Bi2WO6 nanoflake film electrode under visible light irradiation..
MLA	Zhao, Xu,et al."Photoelectrocatalytic degradation of 4-chlorophenol at Bi2WO6 nanoflake film electrode under visible light irradiation".(2010).

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