Transformation of hydroquinone to benzoquinone mediated by reduced graphene oxide in aqueous solution

doi:10.1016/j.carbon.2015.03.027

	Transformation of hydroquinone to benzoquinone mediated by reduced graphene oxide in aqueous solution
	Li, Chunmei 1; Li, Lingyun 2; Sun, Lixiang 3; Pei, Zhiguo 1; Xie, Jieli 1; Zhang, Shuzhen 1
刊名	CARBON
	2015
卷号	89 页码:74-81
ISSN号	0008-6223
DOI	10.1016/j.carbon.2015.03.027
通讯作者	Li, Chunmei
英文摘要	The mediation effect of reduced graphene oxide (rGO) on the oxidative transformation of 1,4-hydroquinone (H(2)Q) to 1,4-benzoquinone (BQ) in aqueous solution was investigated using a batch method and electron paramagnetic resonance. The results showed that the autoxidation of H(2)Q was spin-restricted and extremely slow in acidic and neutral pH range, but this process can be dramatically accelerated when rGO was added. In the presence of 33.3 mg L-1 rGO, more than 76.0% of H(2)Q was oxidized to BQ within 36 h. The enhancement effects of rGO were attributed to the combined contribution of the high chemical reactivity of graphenic edges and defects on rGO and the high electron conductivity of graphene basal surface of rGO. It is proposed that dissolved oxygen reacted with graphenic edges and defects of rGO to produce surface-bound oxygen intermediates, which capture H atoms from the phenolic hydroxyl groups of H(2)Q and facilitate the generation of semiquinone radical (SQ(center dot-)). The generated SQ(center dot-) continued to transfer an electron to molecular oxygen to yield superoxide radical (OF) and BQ. As a chain-carrying radical, OF further reacted with H(2)Q to produce SQ(center dot-) and H2O2. (C) 2015 Elsevier Ltd. All rights reserved.
学科主题	Chemistry, Physical ; Materials Science, Multidisciplinary
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000354592100009
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/100887]
专题	蔬菜花卉研究所_质量安全与检测技术研究室
作者单位	1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 2.Chinese Acad Agr Sci, Inst Vegetables & Flowers, Minist Agr, Supervis & Testing Ctr Vegetable Qual, Beijing 100081, Peoples R China 3.Ludong Univ, Coll Chem & Mat Sci, Yantai 264025, Peoples R China
推荐引用方式 GB/T 7714	Li, Chunmei,Li, Lingyun,Sun, Lixiang,et al. Transformation of hydroquinone to benzoquinone mediated by reduced graphene oxide in aqueous solution[J]. CARBON,2015,89:74-81.
APA	Li, Chunmei,Li, Lingyun,Sun, Lixiang,Pei, Zhiguo,Xie, Jieli,&Zhang, Shuzhen.(2015).Transformation of hydroquinone to benzoquinone mediated by reduced graphene oxide in aqueous solution.CARBON,89,74-81.
MLA	Li, Chunmei,et al."Transformation of hydroquinone to benzoquinone mediated by reduced graphene oxide in aqueous solution".CARBON 89(2015):74-81.