Tb3+-functionalized covalent organic framework for simultaneous detection and removal of Hg2+

被引：0

作者：

Wang, Tengfei ^{[1
]}

Yan, Zhongni ^{[2
]}

Ran, Fuling ^{[2
]}

Wu, Guang ^{[1
]}

Wang, Liwen ^{[1
]}

Tian, Dating ^{[1
]}

机构：

[1] Hubei Key Laboratory of Biological Resources Protection and Utilization, School of Chemical and Environmental Engineering, Hubei Minzu University, Enshi

[2] Second Geological Brigade of Hubei Geological Bureau, Enshi

来源：

Journal of Molecular Liquids | 2024年 / 414卷

关键词：

Adsorption; Covalent organic framework; Fluorescence sensing; Mercury;

D O I：

10.1016/j.molliq.2024.126125

中图分类号：

学科分类号：

摘要：

Hg2+ is a common heavy metal ion contaminant in the environment, as well as one of the most hazardous metal ions on the earth, posing a serious threat to the ecosystem and human health. As a result, it is vital to develop materials that can detect or remove Hg2+. In this work, we fabricated a Tb3+-functionalized covalent organic framework (Tb@COF) platform capable of both detecting and removing Hg2+ for the fluorescence enhancement of Tb3+ and the presence of thiol groups in COF. Tb@COF exhibited good selectivity and sensitivity during the detection of Hg2+, with a linear range of 0.2–50 μmol/L(R2 = 0.9985) and a limit of detection (LOD) of 0.076 μmol/L. We employed Tb@COF to detect Hg2+ in lake water with excellent results, and we developed a smartphone-assisted Tb@COF-based agar slice detection platform that could identify Hg2+ both visually and quantitatively. We discussed the sensing mechanism of Tb@COF for Hg2+. Furthermore, we found that Tb@COF displayed good removal efficiency of Hg2+. The adsorption of Hg2+ by Tb@COF followed the pseudo-second-order kinetic model and Langmuir adsorption isotherm model. Our research provided a novel method for simultaneously detecting and eliminating Hg2+ from the environment. © 2024 Elsevier B.V.

引用

共 47 条

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