Direct exfoliation of graphene in ionic liquids with aromatic groups

被引：50

作者：

Bari, Rozana ^{[1
]}

Tamas, George ^{[2
]}

Irin, Fahmida ^{[1
]}

Aquino, Adelia J. A. ^{[2
]}

Green, Micah J. ^{[1
]}

Quitevis, Edward L. ^{[2
]}

机构：

[1] Texas Tech Univ, Dept Chem Engn, Lubbock, TX 79409 USA

[2] Texas Tech Univ, Dept Chem & Biochem, Lubbock, TX 79409 USA

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2014年 / 463卷

基金：

美国国家科学基金会;

关键词：

Graphene; Ionic liquid; pi-pi stacking; Conductivity; FUNCTIONALIZED GRAPHENE; DISPERSIONS; OXIDE; PHASE;

D O I：

10.1016/j.colsurfa.2014.09.024

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Novel ionic liquids (ILs) were designed and synthesized to contain aromatic groups on the imidazolium cation that non-covalently interact with graphene surfaces. This route enables the dispersion of pristine graphene without covalent functionalization or an additive stabilizer; such dispersions are stable against aggregation and display high concentration values. We find that ILs without these aromatic groups are less effective in graphene dispersion, and the dispersed graphene concentration increases with increasing interaction between the cation and graphene surface. Density functional theory (DFT-D3) calculations support the experimental observations and provide a foundation for predictive modeling of IL design for optimal graphene dispersions. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：63 / 69

页数：7

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