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The aim of this study was to evaluate the effect of different solvents in sonication
process on the formation of graphene from the electrochemical exfoliation of graphite. In
short, graphite rod was exfoliated by electrochemical process with ammonium sulfate as saltelectrolyte. The exfoliated powder then sonicated under two different solvents, which are
Dimethylformamide (DMF) and aqueous solution to form graphene. It was found that similar
structure of graphene was obtained from both types of solvent. However, the amount of
graphene produced was different due to the differences in graphene stability. Graphene is
more stable in DMF solvents compared to the aqueous solution. The aqueous solution can
allow the reversible reaction that can reform graphite oxide from graphene due to the
existence of hydroxyl component in the aqueous solution.
Keywords: graphene, graphite, electrochemical exfoliation, solvent, sonication |
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