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Hydrothermal Synthesis of a Magnesium Vanadate-Functionalized Reduced Graphene Oxide Nanocomposite for an Efficient Photocatalytic Hydrogen Production

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posted on 2023-08-16, 17:40 authored by Fahad A. Alharthi, Adel El Marghany, Naaser A. Y. Abduh, Imran Hasan
Herein, we reported the fabrication of a magnesium vanadate-reduced graphene oxide (Mg3V2O8-rGO) composite. Further, the structural morphology of the as-prepared Mg3V2O8-rGO composite was studied by scanning electron microscopy. Powder X-ray diffraction and energy-dispersive X-ray spectroscopy techniques were also adopted to check the phase purity and elemental composition of the prepared Mg3V2O8-rGO composite. Mg3V2O8-rGO possesses a band gap of 2.98 eV, which prompted us to explore its photocatalytic activity for hydrogen (H2) evolution reaction. The Mg3V2O8-rGO composite demonstrated the generation of a reasonable amount of H2 evolution (97.45 μmol g–1), which is relatively higher than that of pristine Mg3V2O8 (17.45 μmol g–1). This may be attributed to the presence of synergism between Mg3V2O8 and rGO. In addition, Mg3V2O8-rGO also showed good stability and suggested its potential application for photocatalytic H2 evolution applications. So far, no report is available on the use of Mg3V2O8-rGO as a photocatalyst for H2 evolution. We propose the potential role of the Mg3V2O8-rGO composite for photocatalytic H2 evolution applications.

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