Efficient synthesis of graphene sheets using pyrrole as a reducing agent
- Efficient synthesis of graphene sheets using pyrrole as a reducing agent
- Chellachamy A Amarna; Chang Eui Hong; 김남훈; 구본철; Tapas Kuila; 이중희
- graphene; pyrrole; chemical reduction; graphene oxide
- Issue Date
- VOL 49, NO 11, 3497-3502
- 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.
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