Synthesis of functionalized few-layer graphene through fast electrochemical expansion of graphite

•Modified-graphene sheets are prepared by cathodic electrochemical treatment.•Modification of graphene flaks is done by electroreduction of aryl diazonium ions.•Pyrolytic graphite appears as the most appropriate carbon graphite source. Fast and reproducible production of graphene flaks from graphite...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2015-09, Vol.753, p.42-46
Main Authors: Leroux, Yann R., Bergamini, Jean-François, Ababou, Soraya, Le Breton, Jean-Christophe, Hapiot, Philippe
Format: Article
Language:English
Subjects:
Aryldiazonium electroreduction
Carbon surface modification
Chemical Sciences
Electrochemical exfoliation
Graphene
Graphite
HOPG
Material chemistry
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Summary:•Modified-graphene sheets are prepared by cathodic electrochemical treatment.•Modification of graphene flaks is done by electroreduction of aryl diazonium ions.•Pyrolytic graphite appears as the most appropriate carbon graphite source. Fast and reproducible production of graphene flaks from graphite is an important process considering the possible industrial applications of graphene. We propose an electrochemical method to produce functionalized few-layer graphenes in minutes, without the need of prolonged ultrasonic treatment. It mainly consists in the cathodic electrochemical expansion of graphite in DMF. Functionalization of graphite is achieved by reducing aryl diazonium salts in organic solution. This simple methodology allows easily and quickly preparation of modified few-layer graphenes. Two different graphite sources were considered in this work for electrochemical graphene flaks production.
ISSN:1572-6657
0022-0728
1873-2569
0022-0728
DOI:10.1016/j.jelechem.2015.06.013