详细信息

咪唑类离子液体烷基链长度对氧化石墨烯剥离行为的影响    

Influence of Alkyl Chain Length in Imidazole-Ionic Liquid on Exfoliation of Graphene Oxide

文献类型:期刊文献

中文题名:咪唑类离子液体烷基链长度对氧化石墨烯剥离行为的影响

英文题名:Influence of Alkyl Chain Length in Imidazole-Ionic Liquid on Exfoliation of Graphene Oxide

作者:李成均[1,2];卞子君[1,2];周丽绘[1,2];胡军[1,2];刘洪来[1,2]

机构:[1]华东理工大学结构可控先进功能材料及其制备教育部重点实验室,上海200237;[2]华东理工大学化学系,上海200237

年份:2013

卷号:39

期号:6

起止页码:648

中文期刊名:华东理工大学学报(自然科学版)

外文期刊名:Journal of East China University of Science and Technology

收录:CSTPCD;;Scopus;北大核心:【北大核心2011】;CSCD:【CSCD2013_2014】;

基金:国家自然科学基金(21176066);国家重点基础研究发展计划项目(2013CB733501)

语种:中文

中文关键词:氧化石墨烯;剥离;咪唑离子液体

外文关键词:graphene oxide; eMoliation; imidazole ionic liquid

摘要:采用简单的咪唑类离子液体(ILs)共混法,室温下获得了稳定的、被剥离的单层氧化石墨烯(GO)。分析、表征结果表明:咪唑类离子液体通过咪唑阳离子与GO表面的含氧基团相互作用,插层嵌入GO中,氯化1-辛基-3-甲基咪唑盐([Omim]Cl)相对于氯化1-丁基-3-甲基咪唑盐([Bmim]Cl)具有较长的烷基链,对GO的剥离效果更为优越,解离的GO层间距可达1.12nm,表面吸附了[Omim]Cl分子的单层GO的平均厚度约为2nm,离子液体可以有效地阻止石墨烯的再聚集。
The exfoliated and steady monolayer graphene oxide (GO) was obtained by simple mixing of ionic liquids (ILs) at room temperature. The exfoliation was achieved by the intercalation of imidazole-II.s into G() through the interaction between imidazole cations and oxygen-containing groups on G() surface. With longer alkyl chain, 3 methyl-l-octylimidazolium chloride ([OmimiCl) showed better exfoliation of GO than 1-butyl-3-methylimidazolium chloride (EBmim]C1) when used as exfoliated agent. An effectively exfoliated sheet of GO-[Omim] C1 provided a d spacing of 1.12 nm, and the average thickness of a monolayer GO with adsorbed [OmimiC1 molecules was about 2 nm. In addition, the agglomeration of GO sheets was hindered effectively by ILs.

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