Jump to main content
Jump to site search


Enabling efficient visible light photocatalytic water splitting over SrTaO2N by incorporating Sr in its B site

Author affiliations

Abstract

The perovskite oxynitride SrTaO2N is a promising compound for solar energy conversion because it has strong visible light absorption at wavelengths as long as 650 nm. However, its photocatalytic activity is generally very poor, primarily because of the high defect concentration induced during its synthetic procedures as well as photocatalytic self-decomposition events. In this work, we introduce Sr into the B site of SrTaO2N to form a complex perovskite oxynitride, Sr3(Sr1/3Ta2/3)3O9−xNy (i.e. Sr4Ta2O9−xNy). The new compound has a much lower defect concentration compared to SrTaO2N and much higher stability against photocatalytic self-decomposition. More importantly, Sr4Ta2O9−xNy demonstrates significantly improved photocatalytic activity for water oxidation and reduction reactions under visible light irradiation (λ ≥ 400 nm) than SrTaO2N, approaching an apparent quantum efficiency as high as 3.4% at 420 ± 20 nm.

Graphical abstract: Enabling efficient visible light photocatalytic water splitting over SrTaO2N by incorporating Sr in its B site

Back to tab navigation

Supplementary files

Publication details

The article was received on 18 Jul 2018, accepted on 01 Oct 2018 and first published on 03 Oct 2018


Article type: Paper
DOI: 10.1039/C8TA06934D
Citation: J. Mater. Chem. A, 2018, Advance Article
  •   Request permissions

    Enabling efficient visible light photocatalytic water splitting over SrTaO2N by incorporating Sr in its B site

    X. Sun, F. Wu, G. Liu and X. Xu, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C8TA06934D

Search articles by author

Spotlight

Advertisements