Electrochemical oxidation characteristics of p-substituted phenols using   a boron-doped diamond electrode

doi:10.1021/es070955i

CORC > 北京大学 > 环境科学与工程学院

	Electrochemical oxidation characteristics of p-substituted phenols using a boron-doped diamond electrode
	Zhu, Xiuping ; Shi, Shaoyuan ; Wei, Junjun ; Lv, Fanxiu ; Zhao, Huazhang ; Kong, Jiangtao ; He, Qi ; Ni, Jinren
刊名	environmental science technology
	2007
关键词	WASTE-WATER TREATMENT ANODIC-OXIDATION DEGRADATION CHLOROPHENOLS MECHANISM
DOI	10.1021/es070955i
英文摘要	Electrochemical oxidation of some p-substituted phenols (p-nitrophenol, p-hydroxybenzaldehyde, phenol, p-cresol, and p-methoxyphenol) with electron-donating and -withdrawing substituents was studied to reveal the relationship between the structure and the electrochemical reactivity of p-substituted phenols using a boron-doped diamond electrode by voltammetry and bulk electrolysis. Voltammetric study shows that the oxidation peak potentials of p-substituted phenols become more positive with an increase of Hammett's constants, that is, the direct electrochemical oxidation of p-substituted phenol with an electron-withdrawing group is more difficult than that of p-substituted phenol with an electron-donating group. However,the p-substituted phenols with electron-withdrawing groups are degraded faster than those with electron-donating groups in bulk electrolysis, which is opposite to the result obtained on the Pt electrode. These results indicate that the p-substituted phenols are mainly degraded by indirect electrochemical oxidation with hydroxyl radicals on a boron-doped diamond electrode. Under the attack of hydroxyl radicals, the release of p-substituted groups from the aromatic ring is the rate-limiting step. Since electron-withdrawing groups are easy to be released, the p-substituted phenols with these groups are degraded faster than those with electron-donating groups. Therefore, the degradation rates of the p-substituted phenols rise with an increase of Hammett's constants.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000249500700041&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Engineering, Environmental; Environmental Sciences; SCI(E); EI; PubMed; 80; ARTICLE; 18; 6541-6546; 41
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/198033]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Zhu, Xiuping,Shi, Shaoyuan,Wei, Junjun,et al. Electrochemical oxidation characteristics of p-substituted phenols using a boron-doped diamond electrode[J]. environmental science technology,2007.
APA	Zhu, Xiuping.,Shi, Shaoyuan.,Wei, Junjun.,Lv, Fanxiu.,Zhao, Huazhang.,...&Ni, Jinren.(2007).Electrochemical oxidation characteristics of p-substituted phenols using a boron-doped diamond electrode.environmental science technology.
MLA	Zhu, Xiuping,et al."Electrochemical oxidation characteristics of p-substituted phenols using a boron-doped diamond electrode".environmental science technology (2007).