Preparation of sulfonated reduced graphene oxide by radiationinduced chemical reduction of sulfonated graphene oxide
2015
We report the preparation of sulfonated reduced graphene oxide (SRGO) by the sulfonation
of graphene oxide followed by radiation-induced chemical reduction. Graphene oxide
prepared by the well-known modified Hummer's method was sulfonated with the aryl
diazonium salt of sulfanilic acid. Sulfonated graphene oxide (SGO) dispersed in ethanol
was subsequently reduced by γ-ray irradiation at various absorbed doses to produce SRGO.
The results of optical, chemical, and thermal analyses revealed that SRGO was successfully
prepared by γ-ray irradiation-induced chemical reduction of the SGO suspension. Moreover,
the electrical conductivity of SRGO was increased up to 2.94 S/cm with an increase of the
absorbed dose.
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