Functionalized magnetic hydrogen-bonded organic framework for preconcentration and rapid detection of lead and copper ions in water

文献类型： 外文期刊

第一作者： Mao, Xuefei

作者： Mao, Xuefei

作者机构：

关键词： Magnetic hydrogen-bonded organic framework; Lead; Copper; X-ray fluorescence spectrometry; Preconcentration; Rapid detection

期刊名称：MICROCHEMICAL JOURNAL （ 影响因子：5.1； 五年影响因子：4.7 ）

ISSN： 0026-265X

年卷期： 2025 年 209 卷

页码：

收录情况： SCI

摘要： Hydrogen-bonded organic framework (HOF) is a novel and ideal material for preconcentration of heavy metal in water by hydrogen bonding considering simple synthesis and low cost. In this work, magnetic HOF material (Fe3O4@HOF) was designed and synthesized under simple and mild conditions for preconcentration and detection of lead (Pb) and copper (Cu) in water. This Fe3O4@HOF exhibits maximum adsorption capacities for 579.81 mg/g Pb2+ and 146.48 mg/g Cu2+, respectively, with an excellent selectivity (>95 % adsorption) for Pb2+ and Cu2+ in presence of other ions; as well, shows a favorable recycling performance (>95 % adsorption) after 10 adsorption-desorption cycles based on external magnetic adsorption. The mechanism results proved that the adsorption of Pb2+ and Cu2+ might be attributed to chemisorption, electrostatic interactions and ion exchange. Based on the glass fiber membrane filtration, Fe3O4@HOF can be utilized as enrichment material coupled with X-ray fluorescence spectrometer (XRF) for detection of Pb2+ and Cu2+ in water; the limits of detection (LODs) for Pb2+ and Cu2+ were 1.5 mu g/L and 1.3 mu g/L (from 100 mL water to 5 mg Fe3O4@HOF), respectively. This work presents a green, economical and eco-friendly novel material that can be easily prepared, separated and reused, demonstrating a promising potential for efficient preconcentration and sensitive detection of heavy metals in water.

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