TiO2 Nanoparticles-Graphene Composite for Photocatalytic Application
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Abstract
Titanium dioxide (TiO2) nanoparticles, a candidate photocatalyst for organic pollutant treatment is controversially suspected from negative impact by the remaining residues. In this study, TiO2- graphene composite pellet was proposed as a removable catalyst for wastewater treating. Graphene was selected to enhance photocatalytic activity and promote the adhesion of composite ceramic. TiO2-graphene composite pellet was successfully fabricated by solvothermal synthesis, mixing, hydraulic compressing and sintering which were characterized by X-ray diffracting (XRD) analysis, Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). Preliminary test of photocatalytic activity was evaluated by determining methylene blue (MB) degradation efficiency where 74% of MB was degraded within 2 hrs in the visible region (λmax at 662 nm). Furthermore, nanocomposite pellet can be easily retrieved without degradation in solution after treatment.
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