Degradation of organic pollutants by a Co3O4-graphite composite electrode in an electro-Fenton-like system

doi:10.1007/s11434-013-5784-4

	Degradation of organic pollutants by a Co3O4-graphite composite electrode in an electro-Fenton-like system
	Liu Shuan 1,2; Gu Yan 1; Wang ShuLian 1; Zhang Yu 1; Fang YanFen 1; Johnson, David M.3; Huang YingPing 1; Huang, YP
	2013-07-01
发表期刊	CHINESE SCIENCE BULLETIN
ISSN	1001-6538
卷号	58 期号:19 页码:2340-2346
文章类型	Article
摘要	A novel composite electrode was constructed by pressing together Co3O4 and graphite and it was used as the cathode in an electro-Fenton-like (EFL) system. The poor electron transport characteristic of Co3O4 was overcome by incorporating graphite. In situ electro-catalytic generation of hydroxyl radicals (center dot OH) occurred at high current efficiencies from pH 2-10, extending the traditional Fenton reaction pH range. Cyclic voltammetry and AC impedance spectrometry were used to characterize the composite electrode. The ability of the EFL system to degrade organic compounds was investigated using sulforhodamine B (SRB) and 2,4-dichlorophenol (2,4-DCP) as probes. Decoloration of SRB (1.0x10(-5) mol/L) was complete (100%) in 150 min and SRB was effectively degraded from pH 2-10. The decomposition of SRB was studied using Fourier transform infrared spectroscopy (FT-IR) and total organic carbon (TOC) analysis and results indicated that the final degradation products were carbon dioxide, carboxylic acids and amines. The EFL system also decomposed 2,4-DCP and the degradation was 98.6% in 240 min. Electro-catalytic degradation of SRB occurs by a center dot OH mechanism. After 5 times reused, the degradation rate of SRB did not significantly slow down. The electrode shows excellent potential for use in advanced oxidation processes (AOPs) used to treat persistent organic pollutants (POPs) in wastewater.; A novel composite electrode was constructed by pressing together Co3O4 and graphite and it was used as the cathode in an electro-Fenton-like (EFL) system. The poor electron transport characteristic of Co3O4 was overcome by incorporating graphite. In situ electro-catalytic generation of hydroxyl radicals (center dot OH) occurred at high current efficiencies from pH 2-10, extending the traditional Fenton reaction pH range. Cyclic voltammetry and AC impedance spectrometry were used to characterize the composite electrode. The ability of the EFL system to degrade organic compounds was investigated using sulforhodamine B (SRB) and 2,4-dichlorophenol (2,4-DCP) as probes. Decoloration of SRB (1.0x10(-5) mol/L) was complete (100%) in 150 min and SRB was effectively degraded from pH 2-10. The decomposition of SRB was studied using Fourier transform infrared spectroscopy (FT-IR) and total organic carbon (TOC) analysis and results indicated that the final degradation products were carbon dioxide, carboxylic acids and amines. The EFL system also decomposed 2,4-DCP and the degradation was 98.6% in 240 min. Electro-catalytic degradation of SRB occurs by a center dot OH mechanism. After 5 times reused, the degradation rate of SRB did not significantly slow down. The electrode shows excellent potential for use in advanced oxidation processes (AOPs) used to treat persistent organic pollutants (POPs) in wastewater.
关键词	Co3o4-graphite Electrode Electro-fenton-like System Electro-generation Of Hydroxyl Radicals Electro-catalytic Degradation Of Pops
学科领域	Science & Technology - Other Topics
DOI	10.1007/s11434-013-5784-4
URL	查看原文
收录类别	SCI
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000321952900012
WOS关键词	CORE-SHELL NANOWIRES ; IRON REAGENT ; OPERATIONAL PARAMETERS ; WATER ; EFFICIENT ; DECOLORIZATION ; OXIDATION ; SULFATE ; PH
WOS标题词	Science & Technology
引用统计	被引频次：27[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/16359
专题	海洋环境腐蚀与生物污损重点实验室
通讯作者	Huang, YP
作者单位	1.China Three Gorges Univ, Engn Res Ctr Ecoenvironm Three Gorges Reservoir R, Minist Educ, Yichang 443002, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 3.Ferrum Coll, Sch Nat Sci & Math, Ferrum, VA 24088 USA
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Liu Shuan,Gu Yan,Wang ShuLian,et al. Degradation of organic pollutants by a Co3O4-graphite composite electrode in an electro-Fenton-like system[J]. CHINESE SCIENCE BULLETIN,2013,58(19):2340-2346.
APA	Liu Shuan.,Gu Yan.,Wang ShuLian.,Zhang Yu.,Fang YanFen.,...&Huang, YP.(2013).Degradation of organic pollutants by a Co3O4-graphite composite electrode in an electro-Fenton-like system.CHINESE SCIENCE BULLETIN,58(19),2340-2346.
MLA	Liu Shuan,et al."Degradation of organic pollutants by a Co3O4-graphite composite electrode in an electro-Fenton-like system".CHINESE SCIENCE BULLETIN 58.19(2013):2340-2346.

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