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Sulfonated graphene (SG) prepared by anchoring the organic sulfonic acid on the surface of the graphene nanosheets was used as the unique dopant for the in situ chemical oxidative polymerization of pyrrole for the well-defined flake-shaped sulfonated graphene/polypyrrole (SG/PPy) composites. The structures of these composites with the different feeding ratio of SG had been characterized by TEM, SEM,...
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