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Enhanced Photocatalytic Performance of the Graphene-V2O5 Nanocomposite in the Degradation of Methylene Blue Dye under Direct Sunlight

Shanmugam, Mahalingam, Alsalme, Ali, Alghamdi, Abdulaziz, Jayavel, Ramasamy
ACS Applied Materials & Interfaces 2015 v.7 no.27 pp. 14905-14911
Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, graphene, half life, irradiation, methylene blue, mixing, nanocomposites, photocatalysis, scanning electron microscopy, solar radiation, transmission electron microscopy
A simple and efficient solution mixing method has been developed for the synthesis of the G-V₂O₅ nanocomposite. By this method, one-dimensional V₂O₅ rods are decorated onto the two-dimensional graphene sheets. The synthesized nanocomposites are characterized by XRD, SEM with elemental mapping, TEM, FT-IR, Raman, BET, and XPS analyses. The photocatalytic activity of the G-V₂O₅ nanocomposite studied with methylene blue dye shows strong degradation efficiency with direct sunlight irradiation compared to UV and visible light sources. The mechanism of methylene blue dye degradation by the G-V₂O₅ nanocomposite has been elucidated through the kinetics of the degradation process by calculating the rate constant and half-life time of the degradation process.