Ultrafine metal nanoparticles loaded on TiO2 nanorods: Synthesis strategy and photocatalytic activity

doi:10.1016/S1872-2067(15)60954-8

Abstract

Abstract:

Ultrafine noble metal nanoparticles (Pt, Pd, or Au) co-catalyst loaded on the surface of rutile and brookite TiO₂ were prepared via a simple photo-deposition strategy under high vacuum conditions. The properties of the prepared samples were determined by different characterization techniques, including X-ray diffraction, transmission electron microscopy, diffuse reflectance ultraviolet-visible spectroscopy, and photoluminescence spectroscopy. The photocatalytic performance of the samples was evaluated by monitoring the reforming of methanol. Co-catalyst loading greatly improved the photocatalytic activity of TiO₂. Specifically, Pt-TiO₂ displayed the highest photocatalytic activity among all samples studied, followed by Pd-TiO₂ and then Au-TiO₂. Furthermore, this photocatalytic behavior was not influenced by the intrinsic nature of the TiO₂ semiconductor photocatalyst. Similar photocatalytic activity trends were achieved with both sets of noble metal-loaded photocatalysts prepared using rutile and brookite TiO₂ as supports. By examining the physicochemical and photocatalytic properties, the factors controlling the photocatalytic activity of the noble metal-loaded TiO₂ samples were discussed in detail.

Key words: Photocatalyst, Hydrogen production, Rutile, Brookite, Co-catalyst

Weijiong Dai, Junqing Yan, Ke Dai, Landong Li, Naijia Guan. Ultrafine metal nanoparticles loaded on TiO₂ nanorods: Synthesis strategy and photocatalytic activity[J]. Chinese Journal of Catalysis, 2015, 36(11): 1968-1975.

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Ultrafine metal nanoparticles loaded on TiO₂ nanorods: Synthesis strategy and photocatalytic activity

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