Abstract

In the present work, we report the synthesis of graphene oxide (GO) and its derivatives using a biogenic process, treating rice husk ash (RHA) with KOH at high temperatures. The obtained GO was modified by incorporating copper nanoparticles (CuNPs) into its structure through an impregnation process and subsequent wet chemical reduction of the metal using L-ascorbic acid as a reducing and stabilizing agent. The synthesized materials were characterized using FTIR, XRD, SEM, and AFM techniques, demonstrating their shape, structure, and chemical composition. The nanocomposites, identified as partially oxidized graphene (GpO) and GpO-Cu, were employed as electrodes in cyclic voltammetry experiments to determine their conductive properties using a 5 mM potassium ferricyanide solution in 1 M potassium chloride as a reference and a saline solution (KCl) as the working electrolyte solution. The results show the formation of materials that, by modifying their chemical composition, can be used as conductors or capacitors.