Facile synthesis of Ag-reduced graphene oxide hybrids and their application in electromagnetic interference shielding

A fast and environmentally friendly method was proposed toward one-pot synthesis of Ag-reduced graphene oxide (Ag-RGO) hybrids by a chemical reduction method assisted by microwave irradiation treatment with the use of sodium citrate as green reductant. The as-synthesized samples were characterized systematically, and the results indicated the successful synthesis of Ag-RGO. Ag-RGO was further applied as filler in polymethyl methacrylate (PMMA) matrix polymer composites, and their electromagnetic interference (EMI) shielding performance was investigated. The prepared Ag-RGO/PMMA composites with 3.0 vol% Ag-RGO exhibited an excellent EMI shielding effectiveness (EMI SE) of average 26.8 dB in the 8–12 GHz X-band range, which outperformed the RGO/PMMA composites (18.4 dB) with bare RGO as fillers.