Synthesis of graphene/Ag nanocomposite with good dispersibility and electroconductibility via solvothermal method

In the present study, Ag nanoparticles were deposited onto graphene sheets to form graphene/Ag nanocomposites through solvothermal method using ethylene glycol or de-ionzed water/hydrazine as solvent and reducing agent. Ag particles were attached on the graphene sheets and well separated. The size and morphology of the particles were influenced by the reducing agent and solvothermal reaction. Because of the existence of Ag particles, graphene sheets were well separated both in the solution and in the film obtained via vacuum filtration method. The electroconductibility of graphene/Ag film was investigated. It was found that the film resistance were 0.85 Ω cm and 0.60 Ω cm for different reducing agents used, which were close to that of the pure graphene film with same carbon concentration (0.25 Ω cm).