【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。更多还原

【Abstract】 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-ILs into GO through the interaction between imidazole cations and oxygen-containing groups on GO surface. With longer alkyl chain,3-methyl-1-octylimidazolium chloride([Omim]Cl)showed better exfoliation of GO than 1-butyl-3-methylimidazolium chloride([Bmim]Cl)when used as exfoliated agent.An effectively exfoliated sheet of GO-[Omim]Cl provided a d-spacing of 1.12nm,and the average thickness of a monolayer GO with adsorbed[Omim]Cl molecules was about 2nm.In addition,the agglomeration of GO sheets was hindered effectively by ILs.更多还原