Abstract
Graphene oxide (GO) was prepared by modified Hummers' method starting from commercially available graphite. Different amounts of titanium dioxide nanoparticles (TiO2 ) were loaded on the sheets of GO to obtain titanium dioxide/graphene oxide (TiO2 /GO) nanocomposites. The as-synthesized 5 wt % TiO2 /GO nanocomposite was characterized by UV/Vis spectroscopy, photoluminescence spectroscopy, FTIR, powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and atomic force microscopy techniques. The catalytic activity of the 5 wt % TiO2 /GO nanocomposite was evaluated in the esterification of benzoic acid using dimethyl carbonate (DMC) as a green methylating agent. Furthermore, the activity of this nanocomposite for the conversion of benzoic acid was higher than that of the parent GO, TiO2 , TiO2 /activated carbon, and TiO2 /graphite.
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