Journal
INORGANIC CHEMISTRY FRONTIERS
Volume 7, Issue 2, Pages 519-528Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9qi01275c
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [61975245]
- Science and Technology Planning Project of Guangdong Province [2017A010103035]
Ask authors/readers for more resources
In this work, we design oxygen vacancy-rich BiOBr:Yb3+/Er3+ (BYE-OV) ultrathin nanosheets, which can effectively enhance UC luminescence by oxygen vacancy engineering. Density functional theory calculations and UV-Vis-NIR absorption spectra reveal that the existence of oxygen vacancies leads to the formation of an intermediate band (IB) in the bandgap, which can enhance the light absorption ability and promote electron excitation and bandgap transitions (VB -> CB, VB -> IB and IB -> CB), thereby providing the transfer of abundant electrons from the host to Er3+ ions. As a result, the emission intensity of green and red is exceptionally enhanced by 6.5 and 12 times respectively via introduced oxygen vacancies. Meanwhile, BYE-OV exhibits superior photocatalytic activity for the degradation of RhB under visible-NIR light irradiation. The enhanced activity can be mainly ascribed to enhanced photoabsorption in the visible-NIR region and improved UC luminescence. This work offers a new strategy for a rational design for enhancing UC luminescence, which has potential for applications in visible-NIR light photocatalysis.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available