Beijing Key Laboratory for Green Catalysis and Separation, College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, P. R. China.
Small. 2024 Nov;20(48):e2405436. doi: 10.1002/smll.202405436. Epub 2024 Sep 2.
The overuse of antibiotics poses a serious threat to human health and ecosystems. Therefore, the development of high-performance antibiotic removal materials has attracted increasing attention. However, the adsorption and removal of trace amounts of antibiotics in aqueous systems still face significant challenges. Taking tetracycline (TC) as a representative antibiotic and based on its structural characteristics, a series of TC adsorbents are prepared by grafting alkyl groups to the framework of MIL-101(Cr). The adsorptive capacity of the modified materials for tetracycline markedly surpasses that of MIL-101(Cr), with MIL-101-dod achieving the best adsorption performance. MIL-101-dod demonstrated an outstanding ability to adsorb tetracycline at low concentrations, where a 5.0 mg sample of MIL-101-dod can reduce the concentration of a 90 mL 5 ppm tetracycline solution to below 1 ppb, significantly superior to other sorbents. XPS and IR tests indicate that MIL-101-dod has multiple weak interactions with tetracycline molecules, including C─H…O and C─H…π. This work provides theoretical and experimental support for the development of adsorbents for low-concentration antibiotics.
抗生素的过度使用对人类健康和生态系统构成了严重威胁。因此，开发高性能的抗生素去除材料引起了越来越多的关注。然而，在水相体系中吸附和去除痕量抗生素仍然面临着重大挑战。以四环素（TC）为代表的抗生素，基于其结构特点，通过将烷基基团接枝到 MIL-101（Cr）的骨架上，制备了一系列 TC 吸附剂。改性材料对四环素的吸附容量明显超过了 MIL-101（Cr），其中 MIL-101-dod 表现出最佳的吸附性能。MIL-101-dod 在低浓度下对四环素具有出色的吸附能力，5.0mg 的 MIL-101-dod 样品可以将 90mL5ppm 四环素溶液的浓度降低到 1ppb 以下，明显优于其他吸附剂。XPS 和 IR 测试表明，MIL-101-dod 与四环素分子之间存在多种弱相互作用，包括 C─H…O 和 C─H…π。这项工作为开发低浓度抗生素吸附剂提供了理论和实验支持。
