Abstract
A novel β-Bi2O3@BiOBr core/shell photocatalyst was successfully designed by a facile ultrasonication method. The β-Bi2O3@BiOBr photocatalyst showed better photocatalytic antibacterial activity than pure β-Bi2O3 and BiOBr under LED light. β-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 β-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.
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