Abstract
TiO2-Graphene nanocomposites were prepared by a wet chemical method and characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis). The nanocomposite demonstrated nice photocatalytic activity for water reduction to produce hydrogen. The optimal graphene content was found to be 10 wt%, giving a Hydrogen-production rate of 13.2 mmol∙h-1∙g-1, which significantly exceeded the rate observed on pure TiO2. This high photocatalytic H2-production activity is due to the deposition of TiO2 nanoparticles on graphene sheets, which act as an electron acceptor to efficiently separate the photogenerated charge carriers.
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