光催化
抗菌活性
沸石咪唑盐骨架
材料科学
可见光谱
X射线光电子能谱
纳米颗粒
化学工程
纳米技术
复合数
核化学
化学
金属有机骨架
细菌
有机化学
复合材料
催化作用
光电子学
吸附
工程类
生物
遗传学
作者
Yao Zhu,Kangshan Mao,Jian Rong,Yunhua Zheng,Dongya Yang,Tao Zhang,Fengxian Qiu
标识
DOI:10.1016/j.optmat.2022.112085
摘要
The development of metal–organic frameworks (MOFs) as a nanoplatform for emerging antibacterial agents has gained great attention. In this work, TiO2 nanoparticles in-situ incorporated in zeolitic imidazolate framework-L (ZIF-L) successfully grow on the non-textile fabric substrate as a novel antibacterial composite [email protected]2/fabric with improved visible-light driven antibacterial activity. The morphology and composition of the as-prepared antibacterial composite are characterized via SEM, TEM, XRD, and XPS analysis. The material with high light use efficiency can generate more reactive oxygen species (ROS) under light irradiation than that in dark, which suggests the synergistic effect between TiO2 nanoparticles and ZIF-L in the visible region. Correspondingly, [email protected]2/fabric exhibits outstanding antibacterial effect against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), which can also be verified by the Leica SP5 laser scanning confocal microscope (LSCM) results. Furthermore, the possible antibacterial mechanism is proposed. Under visible light irradiation, the synergy of TiO2 nanoparticles and ZIF-L is in favor of producing hydroxyl radical (·OH) and superoxide radicals (·O2−) that directly leads to the death of bacteria. The sufficient antibacterial activity of [email protected]2/fabric (over 95% after six antibacterial assay cycles) ensures the long-term use of the material. At this point, the newly synthesized material gives new sight on preparing other MOFs based composites with photocatalytic antibacterial effect for bacterial issues.
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