TiO2/WO3/Au/MWCNT composite materials for photocatalytic hydrogen production: Advantages and draw-backs

Authors

  • Zsolt Pap,

    Corresponding author
    1. Research Group of Environmental Chemistry, University of Szeged, Tisza Lajos krt. 103, H-6720 Szeged, Hungary
    2. Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Arany János 11, RO-400028 Cluj-Napoca, Romania
    3. Faculty of Physics, Babes-Bolyai University, M. Kogălniceanu 1, RO-400084 Cluj-Napoca, Romania
    • Phone: +36 62 544 338, Fax: +36 62 544 338
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  • Éva Karácsonyi,

    1. Research Group of Environmental Chemistry, University of Szeged, Tisza Lajos krt. 103, H-6720 Szeged, Hungary
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  • Lucian Baia,

    1. Faculty of Physics, Babes-Bolyai University, M. Kogălniceanu 1, RO-400084 Cluj-Napoca, Romania
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  • Lucian Cristian Pop,

    1. Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Arany János 11, RO-400028 Cluj-Napoca, Romania
    2. Faculty of Physics, Babes-Bolyai University, M. Kogălniceanu 1, RO-400084 Cluj-Napoca, Romania
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  • Virginia Danciu,

    1. Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Arany János 11, RO-400028 Cluj-Napoca, Romania
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  • Klára Hernádi,

    Corresponding author
    1. Department of Applied and Environmental Chemistry, University of Szeged, Rerrich tér 1, H-6720 Szeged, Hungary
    • Phone: + 36 62 544 170, Fax: +36 62 426 221
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  • Károly Mogyorósi,

    1. Research Group of Environmental Chemistry, University of Szeged, Tisza Lajos krt. 103, H-6720 Szeged, Hungary
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  • András Dombi

    1. Research Group of Environmental Chemistry, University of Szeged, Tisza Lajos krt. 103, H-6720 Szeged, Hungary
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Abstract

TiO2/WO3/Au/MWCNT composite materials were obtained using different commercial titanias (Aldrich Anatase, Aldrich Rutile, and Evonik Aeroxide P25) and Aldrich WO3. The gold nanoparticles were deposited on the semiconductor oxides' surface by chemical reduction using sodium borohydride, and the MWCNT's were combined with the composite (in different concentrations 0.1–10 wt%) by applying an ultrasonication method. The obtained nanocomposites were successfully characterized by means of X-ray diffraction, transmission electron microscopy, etc. The aim of the present work was to find the optimal composition (i.e. carbon nanotube content) of the composite for photocatalytic hydrogen production using oxalic acid as a sacrificial agent.

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