期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 261, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118248
关键词
Metal-organic framework; Cu doping; Antibacterial; Photocatalytic; Photothermal
资金
- NSFC [51671081, 51871162]
- Natural Science Fund of Hubei Province [2018CFA064]
- RGC/NSFC [N_HKU725-1616]
- Hong Kong ITC [ITS/287/17, GHX/002/14SZ]
- Health and Medical Research Fund [03142446]
Owing to the increasing drug-resistance, antibiotics-free strategy is urgent for the therapy of bacterial infections. Herein, Cu2+ is introduced into the porphyrin ring of PCN 224, which enhances the photocatalytic property of MOFs. The doped Cu2+ could trap electrons, thus suppresses electron-hole recombination and accelerates the transfer of carriers under 660 nm light irradiation, thereby enhancing the yields of reactive oxygen species (ROS). Furthermore, the Cu-MOFs' photothermal effect is strengthened due to the d-d transition. However, overdoping of Cu2+ weakens the photocatalytic and photothermal properties due to the trapping of more photo-electrons by Cu2+ and the decreased light absorption of porphyrin at 660 nm. Doping with 10% Cu2+ endows the MOFs with the best antibacterial efficacy of 99.71% against Staphylococcus aureus within 20 min because of the synergistic effects of ROS and heat. Furthermore, the in vivo results show that Cu2+-MOFs kill bacteria efficiently, thus accelerating wound healing.
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