Substituent effects on the oxidation reactions of 4-nitrophenol, phenol, 4-methylpheol, and 4-methoxyphenol mediated by reduced graphene oxide in water

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Substituent effects on the oxidation reactions of 4-nitrophenol, phenol, 4-methylpheol, and 4-methoxyphenol mediated by reduced graphene oxide in water
	Li, Chunmei; Li, Lingyun; Xie, Jieli; Sun, Lixiang; Wen, Bei; Zhang, Shuzhen; Pei, Zhiguo
刊名	COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
	2018-09-20
卷号	553 页码:35-41
关键词	Reduced graphene oxide Phenolic compound Oxidation coupling Mediation Homolytic bond dissociation energy
ISSN号	0927-7757
文献子类	Article
英文摘要	Substituent effects of 4-nitrophenol (4-NP), phenol (PE), 4-methylpheol (4-MP), and 4-methoxyphenol (4-MOP) on their oxidative coupling reactions mediated by reduced graphene oxide (rGO) were examined using a batch method. The reaction products were identified as the oligomers of their individual parent compound, and C-C and C-O coupling between phenolic radicals were the main reaction pathways. The oxidative kinetics were well described with pseudo-first order model. The rate constants (k(obs)) of 4-NP, PE, 4-MP and 4-MOP were 0.47 x 10(-3), 1.00 x 10(-3), 2.03 x 10(-3), and 3.53 x 10(-3) h(-1), respectively, following the order 4-NP < PE < 4-MP < 4-MOP. The k(obs) of four phenolic compounds was negative linear correlation with their homolytic bond dissociation energies (BDE(O-H)), suggesting that BDE(O-H) was an effective indicator to predict the oxidation susceptibility of phenolic compounds in rGO system. Dissolved oxygen played a critical role in the oxidation reactions through the formation of superoxide anion (O-2 center dot(-)) on rGO. These O-2 center dot(-) further cleaved the O-H bond of phenolic compounds to produce phenolic radicals, which interacted each other and led to the following oxidative coupling reactions. The finding of this study is important for predicting the environmental fate of rGO and phenolic compounds.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/41052]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Li, Chunmei,Li, Lingyun,Xie, Jieli,et al. Substituent effects on the oxidation reactions of 4-nitrophenol, phenol, 4-methylpheol, and 4-methoxyphenol mediated by reduced graphene oxide in water[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2018,553:35-41.
APA	Li, Chunmei.,Li, Lingyun.,Xie, Jieli.,Sun, Lixiang.,Wen, Bei.,...&Pei, Zhiguo.(2018).Substituent effects on the oxidation reactions of 4-nitrophenol, phenol, 4-methylpheol, and 4-methoxyphenol mediated by reduced graphene oxide in water.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,553,35-41.
MLA	Li, Chunmei,et al."Substituent effects on the oxidation reactions of 4-nitrophenol, phenol, 4-methylpheol, and 4-methoxyphenol mediated by reduced graphene oxide in water".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 553(2018):35-41.