Characterisation of oxygen defects and nitrogen impurities in TiO₂ photocatalysts using variable-temperature X-ray powder diffraction.

ABSTRACT: TiO₂-based powder materials have been widely studied as efficient photocatalysts for water splitting due to their low cost, photo-responsivity, earthly abundance, chemical and thermal stability, etc. In particular, the recent breakthrough of nitrogen-doped TiO₂, which enhances the presence of structural defects and dopant impurities at elevated temperatures, exhibits an impressive visible-light absorption for photocatalytic activity. Although their electronic and optical properties have been extensively studied, the structure-activity relationship and photocatalytic mechanism remain ambiguous. Herein, we report an in-depth structural study of rutile, anatase and mixed phases (commercial P25) with and without nitrogen-doping by variable-temperature synchrotron X-ray po

SUBMITTER: Foo C 

PROVIDER: S-EPMC7844033 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature