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 language | English |
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Pages (from-to) | 223-229 |
Number of pages | 7 |
Journal | Journal of Colloid And Interface Science |
Volume | 504 |
DOIs | |
Publication status | Published - 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