Journal
NANOTECHNOLOGY
Volume 33, Issue 24, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1361-6528/ac5aee
Keywords
black phosphorus; Ag nanoparticles; antibacterial activity; scaffold
Funding
- Natural Science Foundation of China [51935014, 82072084, 81871498]
- JiangXi Provincial Natural Science Foundation of China [20192ACB20005, 2020ACB214004, 20202BAB214011]
- Provincial Key R&D Projects of Jiangxi [20201BBE51012]
- Guangdong Province Higher Vocational Colleges & Schools Pearl River Scholar Funded Scheme
- Project of Science and technology of Jiangxi Provincial Education Department [GJJ190465, GJJ210835]
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By decorating silver nanoparticles (AgNPs) on the surface of black phosphorus (BP), BP@AgNPs nanohybrids were constructed, which exhibited synergistically enhanced photocatalytic antibacterial activity. The nanohybrids displayed broadened visible light absorption and accelerated charge transfer while suppressing electron-hole recombination, resulting in efficient antibacterial performance under light irradiation.
Black phosphorus (BP) exhibits great potential as antibacterial materials due to its unique photocatalytic activity. However, the unsatisfactory optical absorption and quick recombination of photoinduced electron-hole pairs restrain its photocatalytic antibacterial performance. In this work, silver nanoparticles (AgNPs) were decorated on BP to construct BP@AgNPs nanohybrids and then introduced into poly-l-lactic acid scaffold. Combining the tunable bandgap of BP and the LSPR effect of AgNPs, BP@AgNPs nanohybrids displayed the broaden visible light absorption. Furthermore, AgNPs acted as electron acceptors could accelerate charge transfer and suppress electron-hole recombination. Therefore, BP@AgNPs nanohybrids achieved synergistically enhanced photocatalytic antibacterial activity under visible light irradiation. Fluorescence probe experiment verified that BP@AgNPs promoted the generation of reactive oxygen species, which could disrupt bacteria membrane, damage DNA and oxide proteins, and finally lead to bacteria apoptosis. As a result, the scaffold possessed strong antibacterial efficiency with a bactericidal rate of 97% under light irradiation. Moreover, the scaffold also exhibited good cytocompatibility. This work highlighted a new strategy to develop photocatalytic antibacterial scaffold for bone implant application.
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