Journal
CHEMICAL ENGINEERING JOURNAL
Volume 431, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.133943
Keywords
MoO3-x; Nanozyme; reactive oxygen species (ROS); Photothermal effect; Antibacterial activity
Categories
Funding
- National Natural Science Foundation of China [21874079, 21575071]
- Natural Science Foundation for Outstanding Young Scientists of Shandong Province [ZR2018JL011]
- Key R&D Project of Shandong Province [GG201809230180]
- Chinese Postdoctoral Science Foundation [2017M620281]
- Qingdao Postdoctoral Application Research Project
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A glucose-functionalized oxygen vacancy-enriched molybdenum oxide (G-MoO3-x) with excellent bienzyme-like activity and photothermal conversion capacity has been prepared. It exhibits significant broad-spectrum antibacterial properties.
Molybdenum trioxide (MoO3) as an artificial enzyme has attracted extensive attention owing to its striking merits. However, it still faces the challenges in poor catalytic activity or low production yield which could be addressed through rational structure design and mechanism elucidation. Herein, a glucose-functionalized oxygen vacancy-enriched molybdenum oxide (G-MoO3-x) is prepared via an environmentally friendly, mass-production and low-temperature hydrothermal method. The G-MoO3-x exhibits excellent bienzyme-like (oxidase and peroxidase) activities and outstanding photothermal conversion capacity (~45.98%). Systematic studies reveal that oxygen vacancy is the determining factor for both enzyme-like activity and photothermal effect of G-MoO3-x, and the peroxidase-like activity is positively correlated with oxygen vacancy concentration. Density functional theory (DFT) calculations indicate that the oxygen (O)-defect MoO3 has a more favorable impact on peroxidase-like activity than MoO3 edge. Through all-in-one synergistic effects, G-MoO3-x nanozyme exhibits significant broad-spectrum antibacterial properties against beta-lactamase-producing Escherichia coli and methicillin-resistant Staphylococcus aureus as well as its biofilm.
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