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    State-of-the-art Sn2+-based ternary oxides as photocatalysts for water splitting: electronic structures and optoelectronic properties

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    Type
    Article
    Authors
    Noureldine, Dalal cc
    Takanabe, Kazuhiro cc
    KAUST Department
    Catalysis for Energy Conversion (CatEC)
    Chemical Science Program
    KAUST Catalysis Center (KCC)
    Physical Science and Engineering (PSE) Division
    Date
    2016
    Permanent link to this record
    http://hdl.handle.net/10754/622469
    
    Metadata
    Show full item record
    Abstract
    Developing visible light responsive metal oxide photocatalysts is a challenge that must be conquered to achieve high efficiency for water splitting or hydrogen evolution reactions. Valence band engineering is possible by forming ternary oxides using the combination of a metal cation with an s2d10 electronic configuration and a transition metal oxide with a d0 configuration. Many (Sn2+, Bi3+, Pb2+)-based ternary metal oxide photocatalysts have been reported for hydrogen and/or oxygen evolution under visible irradiation. Sn2+-based materials have attracted particular attention because tin is inexpensive, abundant and more environmentally friendly than lead or bismuth. In this review, we provide a fruitful library for Sn2+-based photocatalysts that have been reported to evolve hydrogen using sacrificial reagents, including SnNb2O6, Sn2Nb2O7, SnTaxNb2−xO6, SnTa2O6, Sn2Ta2O7, SnWO4 (α and β phases), SnSb2O6·nH2O, and Sn2TiO4. The synthesis method used in the literature and the resultant morphology and crystal structure of each compound are discussed. The density functional theory (DFT) calculations of the electronic structure and density of states are provided, and the consequent optoelectronic properties such as band gap, nature of the bandgap, dielectric constant, and effective masses are summarized. This review will help highlight the main challenges for Sn2+-based materials.
    Citation
    Noureldine D, Takanabe K (2016) State-of-the-art Sn2+-based ternary oxides as photocatalysts for water splitting: electronic structures and optoelectronic properties. Catal Sci Technol 6: 7656–7670. Available: http://dx.doi.org/10.1039/c6cy01666a.
    Sponsors
    The research reported in this work was supported by the King Abdullah University of Science and Technology (KAUST).
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    Catalysis Science & Technology
    DOI
    10.1039/c6cy01666a
    Additional Links
    http://pubs.rsc.org/en/Content/ArticleLanding/2016/CY/C6CY01666A
    ae974a485f413a2113503eed53cd6c53
    10.1039/c6cy01666a
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC)

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