期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 10, 期 3, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2022.107385
关键词
ZIF-67/ZnO hybrid; Semiconductor heterojunction; Photoelectrocatalytic sterilization; K+ leakage; Escherichia coil
资金
- National Key Research and Development Program of China [2020YFA0211004]
- NSFC [21761142011]
- Ministry of Education of China [PCSIRT_IRT_16R49]
- 111'' Innovation and Talent Recruitment Base on Photochemical and Energy Materials [D18020]
- Shanghai Government [19160712900, 20ZR1440700]
- Shanghai Engineering Research Center of Green Energy Chemical Engineering [18DZ2254200]
- Shanghai Frontiers Science Center of Biomimetic Catalysis, China
A new photoelectrocatalytic antibacterial system based on ZIF-67/ZnO@Co foil was developed, which captures bacteria using thorn-like ZnO nanorods and efficiently adsorbs leaked K+ ions using porous ZIF-67. The system achieves complete destruction of bacteria by decomposing their cell membranes and accelerating K+ leakage through visible-light photocatalytic activity. This system shows potential for future sterilization applications.
A new type of ZIF-67/ZnO hybrid coated on Co foil was prepared via an electrochemical etching and hydrothermal processes for photoelectrocatalytic sterilization. The thorn-like ZnO nanorods in the photoanode films play an important role of capturing bacteria from solution. The porous ZIF-67 with high specific surface area efficiently adsorbed the leaked K+ ions assisted by the hERG release, and realizes the visible-light photocatalytic activity with the generation of charge carriers. The visible-light photoelectrocatalytic antibacterial effect on ZIF67/ZnO hybrid is further promoted by applying a potential to the photoelectrode to promote the separation and transfer of charge carriers. As a result, the visible-light photoelectrocatalytic antibacterial effect was powerful for rapid destroy of cell integrity. At the same time, the decomposition of bacteria cell was also facilitated to further accelerate the K+ leakage. Thus, the simultaneous process of destroying cell membrane integrity and leaking K+ ions is achieved during the photoelectrocatalytic process, leading to the complete destruction of bacteria. This photoelectrocatalytic antibacterial system based on ZIF-67/ZnO@Co foil offers a potential way for sterilization application in the future.
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