ZIF-8 modified by isocyanate as a photocatalytic antibacterial agent
作者机构：College of ArchitectureTaiyuan University of Technology Key Laboratory of Interface Science and Engineering in Advanced Materials of Taiyuan University of TechnologyMinistry of Education Department of Materials Science and EngineeringShanxi Institute of Technology Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering
出 版 物：《Rare Metals》 (稀有金属(英文版))
年 卷 期：2024年第43卷第6期
页 面：2708-2718页
核心收录：
学科分类：07[理学] 081705[工学-工业催化] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学]
基 金：financially supported by the Projects of the Research and Development Project of New Materials and Chemical Engineering Research Institute of Shanxi Zhejiang University (No.2021SX-AT010) the National Natural Science Foundation of China (No.21972103) Innovation and entrepreneurship training program for college students (No.202110112012)
主 题：ZIF-8 Hot oxygen sensitization Modified by isocyanate Antimicrobial performance Photocatalytic antibacterial mechanism
摘 要：Zeolite imidazole skeleton（ZIF-8） is a promising option for self-cleaning of building exterior walls due to its large specific surface area,high antibacterial activity and low biotoxicity.However,it suffers from low antibacterial efficiency and yield under visible light irradiation.To address the issues,we developed the photocatalytic materials T-ZIF-8-TDI（thermally treated-ZIF-8-toluene 2,4-diisocyanate） by modifying ZIF-8 with thermal oxygen sensitization and chemical bonding.The results show that the yield of T-ZIF-8-TDI photocatalytic antibacterial agent is increased to 11.5 times of that of T-ZIF-8,while maintaining the crystal structure of T-ZIF-8 and thermal stability up to 60℃.Furthermore,T-ZIF-8-TDI exhibits extended optical response range to the nearinfrared region,significantly narrowed band gap,improved photogenerated elec tron-hole separation efficiency,reduced recombination rate,and excellent photocatalytic performance.When the concentration of antibacterial agent is 600 mg·L-1,the antibacterial rate of Escherichia coli（E.coli） reaches 99.99% irradiated by visible light for30 min,and when the concentration of antibacterial agent is 200 mg·L-1,the antibacterial rate of Staphylococcus aureus（S.aureus） reaches 99.99% irradiated by visible light for 25 min.We also analyzed the reasons in detail from the aspects of bacterial species and antibacterial mechanism,and proposed the antibacterial mechanism of·O2-and h+as the main active species.These findings suggest that T-ZIF-8-TDI photocatalytic antibacterial agent has potential for use in self-cleaning of building exterior walls.
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