Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 816, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.152665
Keywords
beta-Bi2O3@BiOBr; Photocatalyst; LED light; Antibacterial activity
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Funding
- National Natural Science Foundation of China [21406094, 21506079, 21476098]
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A novel beta-Bi2O3@BiOBr core/shell photocatalyst was successfully designed by a facile ultrasonication method. The beta-Bi2O3@BiOBr photocatalyst showed better photocatalytic antibacterial activity than pure beta-Bi2O3 and BiOBr under LED light. beta-Bi2O3@BiOBr photocatalyst can completely inactivate Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) within 50 min. The enhanced photoactivity is due to a hybrid structure of BiOBr and beta-Bi2O3, which led to an efficient separation of electron (e(-)) and hole (h(+)) pairs between the semiconductors. Moreover, the trapping experiment confirmed that h(+) played an important role in the photocatalytic process. The present work provided a novel LED light-activated photocatalyst that was promising for water treatment. (C) 2019 Elsevier B.V. All rights reserved.
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