Preparation of graphene with few defects using expanded graphite and rose bengal

被引：35

作者：

Bang, Gyeong Sook ^{[2
]}

So, Hye-Mi ^{[1
]}

Lee, Mi Jin ^{[1
]}

Ahn, Chi Won ^{[1
]}

机构：

[1] Natl NanoFab Ctr, Nano Mat Lab, Taejon, South Korea

[2] Gwangju Inst Sci & Technol, Adv Photon Res Inst, Kwangju, South Korea

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2012年 / 22卷 / 11期

关键词：

LIQUID-PHASE EXFOLIATION; REDUCTION; DISPERSION; SHEETS; OXIDE;

D O I：

10.1039/c2jm14205h

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：

We report an easy exfoliation technique using expanded graphite and rose bengal that requires shorter sonication time compared to that of currently reported methods in order to produce an aqueous graphene dispersion and high-quality graphene sheets with few defects. This is a simple method for graphene preparation using expanded graphite and rose bengal (RB) with amphiphilic properties as a surfactant in a short reaction time. RB with a hydrophilic carboxyl group and a hydrophobic aromatic group helps to separate the expanded graphite (EG) layers and prevents reformation of the exfoliated graphene layers via electrostatic repulsion. The obtained graphene flakes showed oxygenated sp(3) carbon on the sheet edge and consisted mostly of mono- and few-layer graphene with lateral dimensions of a few hundred nanometres. This method facilitates graphene preparation for various applications.

引用

页码：4806 / 4810

页数：5

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