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Moulahi, Ali
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document
Enhanced Photocatalytic Properties Of The Nb2O5@rGO For The Degradation Of Methylene Blue
Abstract
<jats:title>Abstract</jats:title><jats:p>Mixing the advantages of nano- Nb<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub> and reduced graphene oxide (rGO), composite systems offer great potential of exploration. Herein, Nb<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub> nanoparticles (NPs) and Nb<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub> modified reduced graphene oxide (Nb<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub>@rGO) urchin-like have been successfully synthesized by hydrothermal process. The materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, Nitrogen adsorption-desorption isotherms and UV–vis diffuse reflectance spectroscopy. The photocatalytic efficiency of the Nb<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub> NPs and Nb<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub>/rGO urchin like were evaluated with respect to the degradation of methylene blue (MB) under solar radiation. It is found that the Nb<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub>/rGO with porous structure and high specific surface area of ~ 105.25 m<jats:sup>2</jats:sup>/g shows significantly superior photocatalytic performances for the removal of the MB dye (99% degradation after 1h illumination) than pure Nb<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub> (20% degradation after 1h illumination). The improvement in the photocatalytic properties of the composite material is mainly ascribed to a cooperative effect between the rGO with good electrical conductivity and the unique nano-porous structure of Nb<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub> with abundant catalytic active sites, superior charge transfer efficiency, and stronger oxidation property.</jats:p>