Jump to main content
Jump to site search


An in situ solid-state heredity-restriction strategy to introduce oxygen defects into TiO2 with enhanced photocatalytic performance

Author affiliations

Abstract

Oxygen vacancies are widely investigated because they are a vital factor in semiconductor photocatalysis. The formation of oxygen vacancies mainly depends on a reduction method with a complicated process which causes environmental pollution. In this research, a precursor with deficient oxygen atoms was selected and the amount of reacted oxygen used to form the defected target product was limited, which is an novel and environmentally friendly solid-state strategy to create oxygen vacancies in situ on the surface or into the bulk lattice of titanium dioxide (TiO2) without using any reducing gases and reductive reagents. In particular, the precursor of ammonium oxofluorotitanate (NH4TiOF3) containing only one oxygen atom was designed and synthesized, and then, the amount of oxygen atoms was controlled to react with the titanium atoms in the as-created precursor. Finally, both the internal and exterior oxygen vacancies were simultaneously introduced into TiO2. The obtained photocatalyst, BNC, has a better photocatalytic performance for degradation than the photocatalyst BN5-NH obtained using traditional means of reduction. The photocatalytic degradation rate of BNC for model organic contaminants reached 95% after 12 min illumination. The photocatalytic performance was not obviously weakened after 15 months of use. This work provides a new and environmentally friendly method to create the surface or bulk oxygen vacancies for semiconductor materials, and may prepare the way for the design and synthesis of new and diverse defective materials for various applications.

Graphical abstract: An in situ solid-state heredity-restriction strategy to introduce oxygen defects into TiO2 with enhanced photocatalytic performance

Back to tab navigation

Supplementary files

Publication details

The article was received on 30 Jul 2018, accepted on 11 Sep 2018 and first published on 12 Sep 2018


Article type: Paper
DOI: 10.1039/C8CE01267A
Citation: CrystEngComm, 2018, Advance Article
  •   Request permissions

    An in situ solid-state heredity-restriction strategy to introduce oxygen defects into TiO2 with enhanced photocatalytic performance

    J. Hu, W. Jia, J. Xie, Y. Cao, X. Zhang and D. Jia, CrystEngComm, 2018, Advance Article , DOI: 10.1039/C8CE01267A

Search articles by author

Spotlight

Advertisements