Journal
CHINESE CHEMICAL LETTERS
Volume 31, Issue 10, Pages 2705-2711Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2020.04.026
Keywords
alpha-Bi2O3/g-C3N4; Photocatalysis; Calcination temperature; Z-scheme
Categories
Funding
- National Natural Science Foundation of China [51508254, 51978319]
- Fundamental Research Funds for the Central Universities [lzujbky-2017-it98]
- College Students' Innovative Practice Training Program of Chinese Academy of Sciences [Y710171040]
- Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences
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In this study, alpha-Bi2O3/g-C3N4 nanocomposite with direct Z-scheme was successfully prepared through calcination of BiOCOOH/g-C3N4 precursor at different temperature. Meanwhile, the effect of calcination temperature on the physicochemical properties of alpha-Bi2O3/g-C3N4 was studied. All results confirmed that calcination temperature greatly influences structural, morphology, surface states, photoelectrochemical property and photocatalytic (PC) performance of alpha-Bi2O3/g-C3N4 composite. Furthermore, the alpha-Bi2O3/g-C3N4 composite was applied as photocatalyst to degrade amido black 10B dye under visible light irradiation. It was found that the composite synthesized at 400 degrees C exhibited the highest PC performance due to the intense visible light absorbance and high separation efficiency of electron and hole pairs. Besides, the possible PC mechanism was proposed that the photo-generated charge carrier migration in alpha-Bi2O3/g-C3N4 photocatalyst followed a Z-scheme structure. Finally, the stability test also manifest that the alpha-Bi2O3/g-C3N4 composite photocatalyst has good stability and reusability, which was a promising candidate for wastewater treatment. (C) 2020 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
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