Rutile TiO2 nanocrystals with exposed {3 3 1} facets for enhanced photocatalytic CO2 reduction activity

Quang Duc Truong, Huu Thu Hoa, Thanh Son Le

    Research output: Contribution to journalArticle

    16 Citations (Scopus)

    Abstract

    Rutile TiO2 nanocrystals with exposed high-index facets have been investigated in detail by high-resolution transmission electron microscopy (HR-TEM) and selected-area electron diffraction (SAED). It was found that the each branched nanocrystal is bound by 4 facets of high-index {3 3 1}. Additionally, rutile {1 0 1} twinned structures are formed in the boundary of branches during the growth of multi branches in a hierarchical flower-like nanostructures. Notably, the synthesized nanostructures showed significantly higher photocatalytic activities than that of rod particles with exposed {1 1 0} facets in photocatalytic CO2 reduction. Correlating the presence of high-energy surface on rutile nanocrystals with the photocatalytic activity clearly shows the significant role of surface steps in enhancing intrinsic activity for CO2 reduction to methanol.

    Original languageEnglish
    Pages (from-to)223-229
    Number of pages7
    JournalJournal of Colloid And Interface Science
    Volume504
    DOIs
    Publication statusPublished - 2017 Oct 15

    Keywords

    • CO reduction
    • High-index facets
    • Rutile
    • TiO

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Biomaterials
    • Surfaces, Coatings and Films
    • Colloid and Surface Chemistry

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