• Login
    View Item 
    •   DSpace Home
    • A) Producción científica UCSC
    • Artículos Científicos
    • View Item
    •   DSpace Home
    • A) Producción científica UCSC
    • Artículos Científicos
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Quantum size effect and visible light activity of anatase nanosheet quantum dots

    Thumbnail
    View/Open
    Valdés Héctor -Quantum size effect.pdf (4.983Mb)
    Date
    2019-06-15
    Author
    Vorontsov, Alexander V.
    Valdes, Hector
    Publisher
    Journal of Photochemistry and Photobiology a Chemistry
    Description
    Artículo de publicación SCOPUS
    Metadata
    Show full item record
    Abstract
    Anatase (001)nanosheets have recently attracted great attention as very active catalysts and photocatalysts. These graphene analogs have very high surface area and unique surface properties. In the present paper, very thin two-layer anatase nanosheets are investigated computationally in the form of quantum dots of various size. Quantum size effect (QSE)was clearly observed for nanosheets with fully hydroxylated edges and size up to 14 nm and the ultimate band gap is around 3.4 eV. Dehydroxylation of nanosheets obscured QSE, decreased band gap and induced visible light absorption. Therefore, contradictory trends reported in experimental studies for anatase QSE can be ascribed to different degree of hydroxylation of the TiO 2 samples surface. All anatase nanosheet quantum dots retained their flat graphene-like shape. These findings demonstrate that dehydroxylated anatase nanosheet quantum dots are prospective visible-light active photocatalysts even if their inherent band gap is considerably larger than for bulk anatase.
    URI
    http://repositoriodigital.ucsc.cl/handle/25022009/1870
    Ir a texto completo en URI:
    https://doi.org/10.1016/j.jphotochem.2019.05.001
    Collections
    • Artículos Científicos

    UCSC
    UCSC | Contact Us | Send Feedback
     

     

    Browse

    All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    Login

    Statistics

    View Usage Statistics

    UCSC
    UCSC | Contact Us | Send Feedback