Abstract
Au supported titania composite photocatalyst was prepared by one-pot synthesis method where titanate nanotubes as supports and which was subsequently transformed into anatase TiO2 during the water vapor treatment. The composite was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and N2 isothermal adsorption-desorption. Au nanoparticles in the crystallite size of 10-15 nm were uniformly deposited onto the surface of titanate nanotubes or anatase TiO2 nanoparticles. Some nanotubes were kept even at 120 °C and the composite had specific surface areas ranged from 163 to 310 m2.g1 depending on the vapor temperature. The photocatalytic activity of the composite photocatalyst was evaluated in the degradation of dyes acid red G (ARG) and methylene blue (MB) under UV irradiation. Au supported TiO2 had good adsorption ability to dyes, and showed an enhanced photocatalytic efficiency compared to the pristine titanate nanotubes.
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