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A Mesoporous Pt/TiO2 Nanoarchitecture with Catalytic and Photocatalytic Functions

Authors

  • Xinchen Wang,

    1. Environmental Science Programme, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China, Fax: (+852) 2603-5057
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  • Jimmy C. Yu Prof. Dr.,

    1. Environmental Science Programme, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China, Fax: (+852) 2603-5057
    2. Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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  • Ho Yin Yip,

    1. Environmental Science Programme, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China, Fax: (+852) 2603-5057
    2. Department of Biology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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  • Ling Wu,

    1. Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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  • Po Keung Wong Prof. Dr.,

    1. Environmental Science Programme, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China, Fax: (+852) 2603-5057
    2. Department of Biology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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  • Suk Yin Lai Prof. Dr.

    1. Department of Chemistry, Hong Kong Baptist University, Kowloon, Hong Kong, China
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Abstract

A novel metal/semiconductor nanocomposite with catalytic and photocatalytic functions has been prepared. The new material consists of highly dispersed platinum (Pt) nanoparticles embedded in a cubic mesoporous nanocrystalline anatase (meso-nc-TiO2) thin film. The porous thin film possesses a narrow pore-size distribution and a large surface area. The diameter of the Pt cluster can be controlled to below 5 nm, and the high dispersion of these clusters gives rise to catalytic activity for the oxidation of carbon monoxide, an important reaction for automobile exhaust treatment. This novel ordered mesoporous Pt/TiO2 nanoarchitecture is also a promising photochemical material, as demonstrated by the photo-driven killing of Micrococcus lylae cells on the film.

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