Investigating the Reduction/Oxidation Reversibility of Graphene Oxide for Photocatalytic Applications

László Péter Bakos; Marcell Bohus; Imre Miklós Szilágyi

doi:10.3390/molecules28114344

Molecules (May 2023)

Investigating the Reduction/Oxidation Reversibility of Graphene Oxide for Photocatalytic Applications

László Péter Bakos,
Marcell Bohus,
Imre Miklós Szilágyi

Affiliations

László Péter Bakos: Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szent Gellért tér 4, H-1111 Budapest, Hungary
Marcell Bohus: Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szent Gellért tér 4, H-1111 Budapest, Hungary
Imre Miklós Szilágyi: Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szent Gellért tér 4, H-1111 Budapest, Hungary

DOI: https://doi.org/10.3390/molecules28114344
Journal volume & issue: Vol. 28, no. 11
p. 4344

Abstract

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The aim of the study was to analyze the reversibility of the cycle of graphene oxide (GO), reduced GO, and GO obtained by consecutive reoxidation of reduced GO. Accordingly, GO was heated in three different atmospheres (oxidizing, inert, and reducing, i.e., air, nitrogen, and argon/hydrogen mixture, respectively) at 400 °C to obtain reduced GO with varying composition. The bare GO and the RGO samples were oxidized or reoxidized with HNO3. The thermal properties, composition, bonds, and structure of the samples were investigated with TG/DTA, EDX, Raman spectroscopy, and XRD. Their photocatalytic activity was tested by decomposing methyl orange dye under UV light irradiation.

Published in Molecules

ISSN: 1420-3049 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Organic chemistry
Website: http://www.mdpi.com/journal/molecules

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