Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 851, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.156935
Keywords
Photocatalytic; Yb-Bi2WO6; Oxygen vacancies; Superoxide anion radicals
Categories
Funding
- National Natural Science Foundation of China [21271022]
Ask authors/readers for more resources
Yb-doped Bi2WO6 nanomaterials were synthesized successfully and showed higher photocatalytic activity compared to pristine Bi2WO6, attributed to the introduction of more oxygen vacancies and superoxide anion active groups. Introducing oxygen vacancies to enhance photocatalytic performance is an effective strategy for developing visible light photocatalysts.
Yb-doped Bi2WO6 nanomaterials were successfully synthesized using a mild hydrothermal method. Remarkably, Yb-doped Bi2WO6 photocatalysts exhibited a higher photocatalytic activity than pristine Bi2WO6 by degrading RhB under visible light irradiation. The optimum mass ratio of Yb to Bi2WO6 was 2.0%, and it presented the highest photo-degradation efficiency. The crystal structures, morphologies, surface chemical states, and optical properties of the as-synthesized photocatalysts were carried out by XRD, SEM, XPS and DRS, respectively. The results of electron paramagnetic resonance spectroscopy, radical trapping experiments, photoluminescence spectroscopy and photocurrent measurements indicated that the Yb-doped Bi2WO6 samples produced more oxygen vacancies and superoxide anion active groups (center dot O-2(-)), inhibited the recombination of the photo-generated electron-hole pairs, and enhanced the photo-degradation performance. As a result, the dopant Yb3+ could enhance photocatalytic performance of Bi2WO6 by introducing oxygen vacancies into its lattice. This study provides a useful strategy for developing effective visible light photocatalysts. (C) 2020 Elsevier B.V. All rights reserved.
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