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Photocatalytic oxidation of acetaldehyde by hybrid Pt/WO3–MOR photocatalysts under visible or sunlight irradiation

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Abstract

A hybrid photocatalyst was prepared from visible light-responsive Pt/WO3 and siliceous mordenite (MOR) zeolite by simple impregnation with an aqueous solution of (NH4)10W12O41·5H2O. Unmodified Pt/WO3 had low photocatalytic activity in gas phase oxidation of acetaldehyde because of its low surface area (3–5 m2/g). In contrast, the Pt/WO3–MOR had higher photocatalytic activity under focused sunlight and Xe lamp irradiation. Pt/WO3–MOR with low WO3 content (<20 wt%) adsorbed sufficient acetaldehyde, but absorption of light in the visible region was low. The optimum zeolite content enhancing the photocatalytic activity of Pt/WO3 was estimated to be 30–50 % (w/w). Adsorption of the gaseous reactants and the efficiency of absorption of incident light are both important aspects of high photocatalytic activity.

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Authors and Affiliations

  1. Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1, Naka-ku, Gakuen-cho, Sakai, Osaka, 599-8531, Japan

    Masato Takeuchi, Hiromasa Yamagawa, Masaya Matsuoka & Masakazu Anpo

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  1. Masato Takeuchi
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  2. Hiromasa Yamagawa
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  3. Masaya Matsuoka
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  4. Masakazu Anpo
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Correspondence to Masato Takeuchi.

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Takeuchi, M., Yamagawa, H., Matsuoka, M. et al. Photocatalytic oxidation of acetaldehyde by hybrid Pt/WO3–MOR photocatalysts under visible or sunlight irradiation. Res Chem Intermed 40, 23–31 (2014). https://doi.org/10.1007/s11164-013-1451-2

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  • DOI: https://doi.org/10.1007/s11164-013-1451-2

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