(Bi, Ni)-Based Bimetallic MOF With Light-Assisted Hydrogen Peroxide Generation for Synergistic and Efficient Photocatalytic Antimicrobial.

Abstract

To effectively control the contamination of antibiotic-resistant bacteria (ARB) and antibiotic-resistant genes (ARGs), (Bi, Ni)-based bimetallic metal-organic framework (MOF) with Z-scheme heterojunction was constructed. The visible light-driven (Bi, Ni)-bimetallic MOF generated H₂O₂ and other reactive oxygen species, efficiently eliminating 7.22 log antibiotic-resistant Escherichia coli and 7.16 log methicillin-resistant Staphylococcus aureus within 60 min. (Bi, Ni)-bimetallic MOF exhibited strong chemisorption via amino and benzene ring structures, synergistically enhancing the elimination of ARGs. The sterilization mechanism of (Bi, Ni)-bimetallic MOF was analyzed and discussed based on the results, such as energy band structure and work function. The constructed small reaction equipment was used to explore the potential applications of (Bi, Ni)-bimetallic MOF, and it demonstrated excellent antibacterial properties under actual sunlight. And the prepared CS-PVA-(Bi, Ni)-MOF film had an outstanding fruit preservation effect. This work provided a reliable idea for controlling contamination of ARB and ARGs.