Study of structure, morphology, optical absorption, and gap modulation of Activated carbon (AC) / NiO, Fe3O4, and Co3O4 oxide nanocomposites

Document Type : Original Article


School of Physics, Damghan University, Damghan, Iran.


In this paper, the synthesis and structural and optical properties of activated carbon /metal oxide nanocomposites have been studied for energy storage applications. Activated carbon / nickel oxide, activated carbon / iron oxide, and activated carbon / cobalt oxide nanocomposites were synthesized by green synthesis from carbonaceous waste and their structural and optical properties were investigated. The prepared nanocomposites were characterized by X-ray diffraction (XRD), UV-Vis optical absorption spectroscopy, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and Fourier-transform infrared (FTIR) spectroscopy techniques. The XRD results of the activated carbon / metal oxide nanocomposites, in addition to the activated carbon background, show a polycrystalline phase corresponding to NiO, Fe3O4, and Co3O4 oxides. According to SEM images, a carbon porous background was observed in nanocomposites, which is filled with metal oxide nanoparticles and these nanoparticles present on its surface non-uniformly. The band gap results of nanocomposites showed the presence of two shoulders clearly indicating the presence of two components in the nanocomposite, i.e., activated carbon (3.62-4.65 eV) and metal oxide (3.0 eV- 4.25 eV). In FTIR analysis, in addition of the carbon-carbon bonds, specific peaks were observed in the range of k=400-700 cm-1, indicating that AC/ metal oxide nanocomposites have been successfully synthesized. 


Main Subjects

© 2023 The Author(s). Journal of Progress in Physics of Applied Materials published by Semnan University Press. This is an open access article under the CC-BY 4.0 license. (

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Volume 3, Issue 1 - Serial Number 4
(In honor of 80th birthday of Prof. P. Ramasamy)
November 2023
Pages 15-28
  • Receive Date: 26 April 2023
  • Revise Date: 20 June 2023
  • Accept Date: 24 June 2023