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    Worm-like FeS2/TiO2 Nanotubes for Photoelectrocatalytic Reduction of CO2 to Methanol under Visible Light

    Access Status
    Fulltext not available
    Authors
    Han, E.
    Hu, F.
    Zhang, S.
    Luan, B.
    Li, P.
    Sun, Hongqi
    Wang, Shaobin
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Han, E. and Hu, F. and Zhang, S. and Luan, B. and Li, P. and Sun, H. and Wang, S. 2018. Worm-like FeS2/TiO2 Nanotubes for Photoelectrocatalytic Reduction of CO2 to Methanol under Visible Light. Energy and Fuels. 32 (4): pp. 4357-4363.
    Source Title
    Energy and Fuels
    DOI
    10.1021/acs.energyfuels.7b03234
    ISSN
    0887-0624
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/67164
    Collection
    • Curtin Research Publications
    Abstract

    Photoelectrocatalytic (PEC) reduction of CO 2 to hydrocarbons provides a great technique for CO 2 utilization, renewable energy transformation, and storage. Iron disulfide (FeS 2 ), as an earth-abundant and nontoxic semiconductor, has narrow band gap energy, high photovoltaic conversion efficiency, and light absorption, making it very promising as a photoelectrode in a PEC cell. Herein, novel worm-like FeS 2 /TiO 2 nanotubes (NTs) was prepared by introducing FeS 2 on TiO 2 NTs and exhibited excellent PEC performance for CO 2 reduction to methanol. X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM) showed that worm-like FeS 2 was densely packed on the TiO 2 NT substrate. By introduction of FeS 2 on TiO 2 NTs, the visible light absorption was improved greatly and the energy band gap energy was narrowed to 1.70 eV, which significantly enhanced the photocatalytic performance under visible light. Furthermore, the resistance was reduced with increasing electrocatalytic ability. The major product of PEC reduction of CO 2 was methanol, reaching 91.7 μmol h -1 L -1 .

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