Efficient synthesis of graphene sheets using pyrrole as a reducing agent

Title
Efficient synthesis of graphene sheets using pyrrole as a reducing agent
Authors
Chellachamy A AmarnaChang Eui Hong김남훈구본철Tapas Kuila이중희
Keywords
graphene; pyrrole; chemical reduction; graphene oxide
Issue Date
2011-09
Publisher
Carbon
Citation
VOL 49, NO 11, 3497-3502
Abstract
The efficient synthesis of graphene sheets using pyrrole as a reducing agent was explored. The obtained graphene sheets were dispersible in organic solvents such as ethanol, isopropanol, N,N-dimethylformamide, N-methylpyrrolidone, dimethylsulfoxide, tetrahydrofuran, and acetone. During this reduction reaction, pyrrole was oxidized, forming oxidation product of pyrrole and adsorbed on the graphene sheets surface by π–π interaction. The oxidation product of pyrrole acted as a capping agent for graphene sheets by preventing restacking and formed organically dispersible graphene. The formation of graphene and its crystalline nature was indicated by the transmission electron microscopy and the atomic force microscopy analysis. Raman, X-ray photoelectron spectroscopy and X-ray diffraction provided the evidence for graphene formation from graphene oxide precursor. Furthermore, the reduced oxygen content and N 1s peak observed by the X-ray photoelectron spectroscopy analysis of graphene sheets confirmed the reduction reaction and presence of adsorbed oxidation product on the surface of graphene sheets. The resulting graphene sheets were readily dispersible in solvents and easily to process.
URI
http://pubs.kist.re.kr/handle/201004/39860
ISSN
0008-6223
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KIST Publication > Article
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