SYNTHESIS OF SILVER NANOPARTICLES EMBEDDED REDUCED GRAPHENE OXIDE COMPOSITE

Author (s) : S.Ramya & A.Suguna, M.Anandan & N.Janani

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Abstract :
Metal nanoparticles (NPs) have received a great interest due to its size effect on the physical and chemical properties. Silver NPs have been preliminary focused towards the synthesis of metal nanocomposite embedded in reduced graphene oxide (rGO) to obtain superior composite materials for many useful biological, chemical as well as mechanical applications. For this study, the matrix rGO material was prepared using natural vein graphite through chemical reduction method. The silver NPs were synthesized using millimolar concentrations of sodium borohydride (NaBH4). The synthesized composite material was characterized by X-ray Diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), high-resolution transmittance electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) techniques. The XRD phase analysis confirms the presence of silver NPs in the composite material with the strong peak present at 2θ= 38.01° with a d-spacing of (002) 2.36A°. The SEM analysis of composite material confirms the puffed-like morphology after the synthesis process. Further, the EDS surface mapping reveals the homogeneous distribution of silver nanoparticles in the rGO surface. The HRTEM analysis reveals that the average diameter of silver NPs embedded in rGO sheets is 1.63 nm with a lattice parameter of 0.409 nm, which is consistency with the theoretical lattice parameter of 111 zone axis of silver NPs. Moreover, XPS results clearly suggest the presence of a pure silver particle in the composite material. Interestingly, this results confirms the successful synthesis of rGO/ Ag nanocomposite by the Sri Lankan natural vein graphite as the starting material.

Keywords : reduced graphene oxide, natural vein graphite, silver nanoparticles, chemical reduction

Conference Date : 17/09/2021

Pages : 275

Paper ID : IESMDT273