ゼオライトおよびメソポーラスモレキュラー・シープ細孔内に構築した酸化チタン光触媒上での二酸化炭素の水による還元固定化 Photocatalytic Reduction of CO_2 with H_2O on Titanium Oxides Prepared within Zeolites and Mesoporous Molecular Sieves

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Abstract

<p>Unique titanium oxide photocatalysts incorporated within the cavities and frameworks of zeolites and mesoporous molecular sieves were prepared and their reactivity for the photocatalytic reduction of CO<sub>2</sub> with H<sub>2</sub>O were investigated. UV-irradiation of these titanium oxide photocatalysts in the presence of CO<sub>2</sub> and H<sub>2</sub>O at 323 K led to the formation of CH<sub>4</sub> and CH<sub>3</sub>OH along with a minor formation of CO and O<sub>2</sub>. The isolated tetrahedrally coordinated titanium oxide highly dispersed within the zeolite frameworks exhibited a characteristic reactivity for the selective formation of CH<sub>3</sub>OH. The photocatalytic reactivity for the formation of CH<sub>3</sub>OH was found to be closely associated with the concentration of charge transfer excited triplet state, (Ti<sup>3+</sup>—O<sup>−</sup>)*, of the highly dispersed tetrahedrally coordinated titanium oxide species and the selectivity for the photocatalytic formation of CH<sub>3</sub>OH was controlled by the hydrophobic and hydrophilic properties of these photocatalysts.</p>

Journal

  • Electrochemistry

    Electrochemistry 70(6), 402-408, 2002-06-05

    The Electrochemical Society of Japan

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Codes

  • NII Article ID (NAID)
    10008573354
  • NII NACSIS-CAT ID (NCID)
    AN00151637
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    13443542
  • NDL Article ID
    6179817
  • NDL Source Classification
    ZP1(科学技術--化学・化学工業)
  • NDL Call No.
    Z17-14
  • Data Source
    CJP  NDL  J-STAGE 
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