吸附
化学
依诺沙星
共价键
检出限
荧光
组合化学
氢键
诺氟沙星
离子键合
化学工程
有机化学
色谱法
离子
分子
环丙沙星
生物化学
物理
量子力学
工程类
抗生素
作者
Shumin Lin,Ming Su,Xiliang Li,Shuxuan Liang
标识
DOI:10.1016/j.seppur.2023.126167
摘要
Covalent organic frameworks (COFs) have great adsorption potential due to their tunable pore size and pore architecture as well as tailorable functionalities. However, the green and rapid synthesis of COFs with excellent adsorption properties remains a great challenge. Here, we presented a solvent-free and facile mechanochemical approach for the synthesis of COFs. The as-prepared COF TpBD-(SO3Na)2 containing sulfonate ions exhibited good thermal and chemical stability and can serve as an effective adsorbent for selective capture of fluoroquinolone antibiotics (FQs) benefiting from the ionic interface and abundant negatively charged sites. The maximum adsorption capacities of norfloxacin, enoxacin, and ciprofloxacin were 1709.6, 1661.5, and 1362.8 mg g−1, respectively, which outperformed those of other reported adsorbents. The adsorption mechanism was deeply explored through characterizations combined with density functional theory calculations, proving the synergistic adsorption effects of TpBD-(SO3Na)2 and FQs, including π-π* interactions, electrostatic interactions, and hydrogen bonding. Moreover, a fluorescence detection platform for FQs was developed based on the fluorescence signal of sodium disulfonate TpBD-(SO3Na)2. The limit of detection of norfloxacin was 8 nmol/L with a linear range from 0.03 to 6 μmol/L. This research provides a new strategy for the green synthesis of COFs and expands their application in the synchronous detection and removal of FQs in aquatic environments.
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