A One Step Hydrothermal Approach for the Improved Synthesis of Graphene Nanosheets
Sang Jae Kim.
In this paper, we are reporting a one step hydrothermal approach to the synthesis of graphene nanosheets via reduction of graphene
oxide (GO). The obtained graphene nanosheets are characterized using X-ray diffraction (XRD), UV-vis spectroscopy, Transmission
electron microscope (TEM), X-ray photoelectron (XPS) and Raman spectroscopic techniques. XRD analysis revealed the regraphitization
process occurred in the graphene nanosheets. The UV-vis spectroscopy showed red shift in the absorption band due to the
formation of graphene nanosheets. TEM studies revealed the sheet like morphology of the obtained graphene. XPS spectra confirmed the
removal of oxygenated functional groups in graphene due to the hydrothermal reduction reaction. Raman spectra confirmed the restoration
of sp2 clusters in graphene sheets after the reduction. The average crystallite size of the sp2 clusters in graphene sheets was calculated
from the Raman spectra as 11.76 nm.
Keywords: Graphene nanosheets, hydrothermal approach, Raman spectroscopy, X-ray photoelectron spectroscopy
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