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

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• 作者：Masato Takeuchi (1)
  Hiromasa Yamagawa (1)
  Masaya Matsuoka (1)
  Masakazu Anpo (1)
  
• 关键词：Pt ; loaded WO3 photocatalyst ; Siliceous zeolite adsorbent ; Visible light ; Focused sunlight
• 刊名：Research on Chemical Intermediates
• 出版年：2014
• 出版时间：January 2014
• 年：2014
• 卷：40
• 期：1
• 页码：23-31
• 全文大小：513 KB
• 作者单位：Masato Takeuchi (1)
  Hiromasa Yamagawa (1)
  Masaya Matsuoka (1)
  Masakazu Anpo (1)
  
  1. Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1, Naka-ku, Gakuen-cho, Sakai, Osaka, 599-8531, Japan
  
• ISSN：1568-5675

文摘

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-?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 30-0?% (w/w). Adsorption of the gaseous reactants and the efficiency of absorption of incident light are both important aspects of high photocatalytic activity.