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

CORC > 过程工程研究所 > 中国科学院过程工程研究所 > 研究所（批量导入）

	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
	2007-09-15
卷号	41 期号:18 页码:6541-6546
关键词	waste-water treatment anodic-oxidation degradation chlorophenols mechanism
ISSN号	0013-936X
其他题名	Environ. Sci. Technol.
中文摘要	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.
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.
WOS标题词	Science & Technology ; Technology ; Life Sciences & Biomedicine
类目[WOS]	Engineering, Environmental ; Environmental Sciences
研究领域[WOS]	Engineering ; Environmental Sciences & Ecology
关键词[WOS]	WASTE-WATER TREATMENT ; ANODIC-OXIDATION ; DEGRADATION ; CHLOROPHENOLS ; MECHANISM
收录类别	SCI
原文出处	://WOS:000249500700041
语种	英语
WOS记录号	WOS:000249500700041
公开日期	2013-10-15
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/3539]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Peking Univ, Coll Environm Sci & Engn, Key Lab Water & Sediment Sci, Minist Educ, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100080, Peoples R China 3.Univ Sci & Technol Beijing, Dept Mat Sci & Engn, Beijing 100083, Peoples R China
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,2007,41(18):6541-6546.
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,41(18),6541-6546.
MLA	Zhu, Xiuping,et al."Electrochemical oxidation characteristics of p-substituted phenols using a boron-doped diamond electrode".ENVIRONMENTAL SCIENCE & TECHNOLOGY 41.18(2007):6541-6546.