Effect of nitro substituent on electrochemical oxidation of phenols at   boron-doped diamond anodes

doi:10.1016/j.chemosphere.2009.12.036

CORC > 北京大学 > 环境科学与工程学院

	Effect of nitro substituent on electrochemical oxidation of phenols at boron-doped diamond anodes
	Jiang, Yi ; Zhu, Xiuping ; Li, Hongna ; Ni, Jinren
刊名	chemosphere
	2010
关键词	Electrochemical oxidation Boron-doped diamond electrodes Nitrophenol Wastewater treatment LEAD DIOXIDE ANODES WATER-TREATMENT ELECTRODES DEGRADATION MECHANISM WASTES
DOI	10.1016/j.chemosphere.2009.12.036
英文摘要	In order to investigate nitro-substitutent's effect on degradation of phenols at boron-doped diamond (BDD) anodes, cyclic voltammetries of three nitrophenol isomers: 2-nitrophenol (2NP), 3-nitrophenol (3NP) and 4-nitrophenol (4NP) were studied, and their bulk electrolysis results were compared with phenol's (Ph) under alkaline condition. The voltammetric study showed nitrophenols could be attacked by hydroxyl radicals and nitro-group was released from the aromatic ring. Results of bulk electrolysis showed degradation of all phenols were fit to a pseudo first-order equation and followed in this order: 2NP > 4NP > 3NP > Ph. Molecular structures, especially carbon atom charge, significantly influenced the electrochemical oxidation of these isomers. Intermediates were analyzed during the electrolysis process, and were mainly catechol, resorcinol, hydroquinone, and carboxylic acids, such as acetic acid and oxalic acid. A simple degradation pathway was proposed. Moreover, a linear increasing relationship between degradation rates and Hammett constants of the studied phenols was observed, which demonstrated that electrochemical oxidation of these phenols was mainly initiated by electrophilic attack of hydroxyl radicals at BDD anodes. (C) 2009 Elsevier Ltd. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000275353100004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Environmental Sciences; SCI(E); EI; PubMed; 18; ARTICLE; 9; 1093-1099; 78
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/158936]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Jiang, Yi,Zhu, Xiuping,Li, Hongna,et al. Effect of nitro substituent on electrochemical oxidation of phenols at boron-doped diamond anodes[J]. chemosphere,2010.
APA	Jiang, Yi,Zhu, Xiuping,Li, Hongna,&Ni, Jinren.(2010).Effect of nitro substituent on electrochemical oxidation of phenols at boron-doped diamond anodes.chemosphere.
MLA	Jiang, Yi,et al."Effect of nitro substituent on electrochemical oxidation of phenols at boron-doped diamond anodes".chemosphere (2010).