Synthesis of Graphene/Cobalt Oxide Nanocomposite by Pulsed Laser Ablation in Water and its Characteristics

Abstract

This work aims to provide an overview of the synthesis and characterization method employed for the Graphene/Cobalt nanocomposite, along with highlighting its applications. In this research, we report the synthesis of Graphene/Cobalt nanocomposite using Two-steps Laser ablation technique. The experiments were performed with the first harmonic (1064 nm, 10 ns, 6 Hz) output of a Nd:YAG laser varying the operative energy of 100 mJ for graphene synthesis and 80 mJ for cobalt synthesis. The structural, morphological and optical characteristics of the prepared samples have been investigated using x ray diffraction (XRD) analysis, field effect electron microscope (FESEM), energy dispersive spectrum (EDX) and UV-Visible spectrophotometry. All characteristic peaks of XRD and EDX results agreed well with those of graphene and Cobalt oxide. The FESEM images showed the formation of graphene nano sheets and Co or Co Oxide nanoparticles. The average grain size of these nanoparticles was estimated about 25 nm.