Key Lab of Eco-Environments Related Polymer Materials of MOE, Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, PR China.
Key Lab of Eco-Environments Related Polymer Materials of MOE, Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, PR China.
Anal Chim Acta. 2022 Jan 15;1190:339247. doi: 10.1016/j.aca.2021.339247. Epub 2021 Nov 3.
Metal-organic frameworks (MOFs) can perform later transformation without compromising the integrity of the overall framework, and a variety of chemical reactions can be used to modify framework components. Postsynthetic modification (PSM) of MOFs has been developed as an alternative strategy that can expand the range of MOF functional groups. Considering the p-type semiconducting visible light active performance of CuBiO (CBO) and the unique porous nanostructure and stability of zeolitic imidazolate framework-8 (ZIF-8), in this work, a novel core-shell coordination assembled hybrid based on p-type semiconductor@MOFs (Eu-CBO@ZIF-8) is prepared for the first time via in-situ growth and postsynthetic metal exchange. A series of detailed characterizations were conducted to confirm the successful synthesis of the material. Moreover, we are focusing on using this material as a new dual-functional sensing material for simultaneous detection and removal of tetracycline (TC), which shows an outstanding analytical performance with a low detection limit of 17 nM, relatively broad linear range (0-70 μM), fast response of less than 120 s, and excellent adsorption performance (377.07 mg g) toward TC. In addition, the sensitive luminescence response caused by TC makes Eu-CBO@ZIF-8 undergo a significant color transition from dark to red under UV-lamps, which is beneficial for visual analysis with the naked eye. The possible detection and adsorption mechanisms, including coordination between Eu and the detected substance, the hydrogen bond between ligand and the detected substance, were further discussed. In addition, the practical feasibility of Eu-CBO@ZIF-8 for TC sensing was also studied, with a satisfactory recovery rate of 96.9%-104.6% and RSD ≤3.32%. These results indicate that this material can be used for the detection and adsorption of TC in actual samples.
金属-有机骨架（MOFs）可以在不破坏整体骨架完整性的情况下进行后续转化，并且可以使用各种化学反应来修饰骨架组件。MOFs 的后合成修饰（PSM）已被开发为一种替代策略，可以扩展 MOF 官能团的范围。考虑到 CuBiO（CBO）的 p 型半导体可见光活性性能以及沸石咪唑酯骨架-8（ZIF-8）独特的多孔纳米结构和稳定性，在这项工作中，首次通过原位生长和后合成金属交换制备了一种基于 p 型半导体@MOFs（Eu-CBO@ZIF-8）的新型核壳配位组装杂化物。进行了一系列详细的表征以确认材料的成功合成。此外，我们专注于将该材料用作同时检测和去除四环素（TC）的新型双功能传感材料，该材料具有出色的分析性能，检测限低至 17 nM，相对较宽的线性范围（0-70 μM），小于 120 s 的快速响应时间以及对 TC 的出色吸附性能（377.07 mg g）。此外，TC 引起的敏感发光响应使 Eu-CBO@ZIF-8 在 UV 灯下从暗到红发生明显的颜色转变，这有利于肉眼进行可视化分析。进一步讨论了可能的检测和吸附机制，包括 Eu 与被检测物质之间的配位，配体与被检测物质之间的氢键。此外，还研究了 Eu-CBO@ZIF-8 用于 TC 传感的实际可行性，其回收率为 96.9％-104.6％，RSD≤3.32％。这些结果表明，该材料可用于实际样品中 TC 的检测和吸附。
