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Comparative Characterization of Graphene Oxides Obtained from Graphite Foil Wastes and Flake Graphite

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Abstract:

Graphene oxide (GO) and reduced graphene oxide (rGO) were obtained from graphite foil wastes (GFWs) by oxidation with KMnO4 in the presence of concentrated sulfuric acid at 25–50°C. The resulting GOs were compared with that obtained from flake graphite under the same conditions. The samples were investigated by UV–Vis, FTIR, and Raman spectroscopy methods. Spectroscopic data, as well as EDS and XRD analyses, have shown that the GO samples obtained in both cases are almost identical. The hydrodynamic diameter and ζ-potential of both sample suspensions were also determined. The average particles size of GO(graflex) is 321.5 nm, while the particles size of GO(graphite) reaches 252 nm. The measured ζ-potential values for GO(graflex) and GO(graphite) are –31.58 and –50.04 mV, respectively. Therefore, GFWs can serve as precursor for the production of GOs.

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Periodical:

Materials Science Forum (Volume 1166)

Pages:

83-90

DOI:

https://doi.org/10.4028/p-x6SLR5

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Online since:

November 2025

Authors:

Ketevan Sarajishvili, Shalva Kekutia, Jano Markhulia, Vladimer Mikelashvili, Natia Barbakadze, Tamar Korkia, Irma Jinikashvili, Otar Tsagareishvili, Levan Chkhartishvili*, Roin Chedia

Keywords:

FTIR Spectroscopy, GO, Graphite Foil Waste, Raman Spectroscopy, rGO, UV–Vis Spectroscopy

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© 2025 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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