Edge-carboxylated graphene nanosheets via ball milling

In Yup Jeon, Yeon Ran Shin, Gyung Joo Sohn, Hyun Jung Choi, Seo Yoon Bae, Javeed Mahmood, Sun Min Jung, Jeong Min Seo, Min Jung Kim, Dong Wook Chang, Liming Dai, Jong Beom Baek

Research output: Contribution to journalArticlepeer-review

616 Scopus citations

Abstract

Low-cost, high-yield production of graphene nanosheets (GNs) is essential for practical applications. We have achieved high yield of edge-selectively carboxylated graphite (ECG) by a simple ball milling of pristine graphite in the presence of dry ice. The resultant ECG is highly dispersable in various solvents to self-exfoliate into single- and few-layer (≤5 layers) GNs. These stable ECG (or GN) dispersions have been used for solution processing, coupled with thermal decarboxylation, to produce large-area GN films for many potential applications ranging from electronic materials to chemical catalysts. The electrical conductivity of a thermally decarboxylated ECG film was found to be as high as 1214 S/cm, which is superior to its GO counterparts. Ball milling can thus provide simple, but efficient and versatile, and eco-friendly (CO 2-capturing) approaches to low-cost mass production of high-quality GNs for applications where GOs have been exploited and beyond.
Original languageEnglish (US)
Pages (from-to)5588-5593
Number of pages6
JournalPROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume109
Issue number15
DOIs
StatePublished - Apr 10 2012
Externally publishedYes

ASJC Scopus subject areas

  • General

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