Synthesis of reduced graphene oxide by electrochemical method for electromagnetic interference shielding applications
DOI:
https://doi.org/10.54939/1859-1043.j.mst.110.2026.117-124Keywords:
Graphene oxide (GO); Reduced graphene oxide (rGO); Electrochemical exfoliation; Electromagnetic interference (EMI) shielding.Abstract
In this study, graphene oxide (GO) was synthesized via an electrochemical exfoliation method in an (NH4)2SO4 electrolyte solution using two different types of graphite electrodes, namely graphite foil and graphite plate, under an applied potential of 10 V with a controlled current density for 45 minutes. The obtained GO was subsequently subjected to thermal reduction in a nitrogen (N₂) atmosphere at 800 °C for 1 hour with a heating rate of 5 °C/min, yielding reduced graphene oxide (rGO). The structural and morphological characteristics of rGO were investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR), and energy-dispersive X-ray spectroscopy (EDX). The results revealed that rGO synthesized from graphite foil electrodes exhibited a multilayered structure with a thickness corresponding to 8–15 graphene layers. This morphology is considered highly suitable for the development of materials for electromagnetic interference (EMI) shielding applications.
References
[1]. M. J. Allen, V. C. Tung, R. B. Kaner, “Honeycomb Carbon: A Review of Graphene”, Chem. Rev., 110, 1, 132–145, (2010).
[2]. Y. Yan et al., “Synthesis of graphene: Potential carbon precursors and approaches”, Nanotechnology Reviews, 9, 1, 1284–1314, (2020).
[3]. Y. Zhu et al., “Graphene and Graphene Oxide: Synthesis, Properties, and Applications”, Advanced Materials, 22, 35, 3906–3924, (2010).
[4]. D. R. Cooper et al., “Experimental Review of Graphene”, ISRN Condensed Matter Physics, 2012, –, 1–56, (2012).
[5]. S. Pei, H.-M. Cheng, “The reduction of graphene oxide”, Carbon, 50, 9, 3210–3228, (2012).
[6]. S. Park, R. S. Ruoff, “Chemical methods for the production of graphenes”, Nature Nanotech, 4, 4, 217–224, (2009).
[7]. C. T. J. Low, F. C. Walsh, M. H. Chakrabarti, M. A. Hashim, M. A. Hussain, “Electrochemical approaches to the production of graphene flakes and their potential applications”, Carbon, 54, –, 1–21, (2013).
[8]. Y. Bleu, F. Bourquard, A.-S. Loir, V. Barnier, F. Garrelie, C. Donnet, “Raman study of the substrate influence on graphene synthesis using a solid carbon source via rapid thermal annealing”, Journal of Raman Spectroscopy, 50, 11, 1630–1641, (2019).
[9]. C. Ferrari, D. M. Basko, “Raman spectroscopy as a versatile tool for studying the properties of graphene”, Nature Nanotech, 8, 4, 235–246, (2013).
[10]. M. K. Rabchinskii et al., “Chemistry of Reduced Graphene Oxide: Implications for the Electrophysical Properties of Segregated Graphene–Polymer Composites”, Nanomaterials, 14, 20, 1664, (2024).
