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Photocatalytic oxidation of acetaldehyde by hybrid Pt/WO-MOR photocatalysts under visible or sunlight irradiation

Research on Chemical Intermediates, ISSN: 0922-6168, Vol: 40, Issue: 1, Page: 23-31
2014
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Conference Paper Description

A hybrid photocatalyst was prepared from visible light-responsive Pt/WO and siliceous mordenite (MOR) zeolite by simple impregnation with an aqueous solution of (NH)WO ·5HO. Unmodified Pt/WO had low photocatalytic activity in gas phase oxidation of acetaldehyde because of its low surface area (3-5 m/g). In contrast, the Pt/WO-MOR had higher photocatalytic activity under focused sunlight and Xe lamp irradiation. Pt/WO-MOR with low WO 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/WO 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. © 2013 Springer Science+Business Media Dordrecht.

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