Preparation of graphite nanoplatelets and graphene sheets

被引：394

作者：

Geng, Yan ^{[1
]}

Wang, Shu Jun ^{[1
]}

Kim, Jang-Kyo ^{[1
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2009年 / 336卷 / 02期

关键词：

Graphite nanoplatelet; Graphene; Exfoliation; Formic acid; AQUEOUS DISPERSIONS; OXIDE; FILMS; REDUCTION; CARBON;

D O I：

10.1016/j.jcis.2009.04.005

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：

A novel route is proposed to produce graphite nanoplatelets (GNPs) and graphene sheets. The natural graphite flakes were directly exfoliated by ultrasonication in formic acid. A stable graphene aqueous dispersion was obtained using the as-produced GNPs after two processing steps: (i) chemical oxidation of GNPs to graphite oxide nanoplatelets (GONPs); and (J) chemical reduction of graphite oxide nanoplatelets to graphene. The total duration for oxidation and production of stable graphite oxide colloid was significantly shortened due to the use of exfoliated GNPs with large surface area. The work proposed here has several advantages over the previous methods, including a high efficiency of exfoliation process, the use of a non-toxic, environmental-friendly intercalant and the capability for mass production of graphene for industrial applications. (C) 2009 Elsevier Inc. All rights reserved.

引用

页码：592 / 598

页数：7

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