Amino-enriched Zn-MOFs with self-reduction for energy-free simultaneous removal and electrochemical detection of heavy metal ions in the aquatic environment

IF 5.7 2区 化学 Q1 CHEMISTRY, ANALYTICAL Analytica Chimica Acta Pub Date : 2024-11-06 DOI:10.1016/j.aca.2024.343408
Zhiying Shao, Kezuo Di, Lijun Ding, Fuheng You, Cunhao Fan, Kun Wang
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Abstract

Background

Heavy metal pollution is a global environmental problem. Self-reduction strategy has garnered attention in adsorption and electrochemical detection of heavy metal ions due to their operational simplicity and elimination of the need for external electrodeposition steps. Therefore, it is crucial to integrate self-reduction-based adsorption with electrochemical detection. Metal-Organic Frameworks (MOFs) have demonstrated successful applications in adsorption and electrochemical detection. Moreover, owing to the presence of organic ligands featuring amino and electron-rich aromatic ring moieties, MOFs possess reducing capabilities towards metal ions.

Results

Herein, 2,4,6-triaminopyrimidine, characterized by its abundance of amino and electron-rich aromatic ring constituents, was selected as the organic ligand for the synthesis of Zn-MOFs, showcasing their efficacy in self-reduction-based adsorption and electrochemical detection of heavy metal ions. The Zn-MOFs exhibited swift uptake of heavy metal ions, boasting a remarkable adsorption capacity (4624 mg/g for Cu(II), 4261 mg/g for Hg(II), and 4874 mg/g for Pb(II)), while also exhibiting low detection limits (0.17 μg/L for Cu(II), 0.25 μg/L for Hg(II), and 0.22 μg/L for Pb(II)) in the electrochemical detection of heavy metal ions.

Significance

In this work, amino-rich Zn-MOFs were prepared for self-reducing adsorption and electrochemical detection of heavy metal ions, providing promising material for the detection and removal of heavy metal ions, offering a new method for the effective elimination and rapid detection of heavy metal ions, and pointing out a promising path for the treatment and monitoring of environmental issues.

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具有自我还原功能的富含氨基的 Zn-MOFs 可用于无能量同时去除和电化学检测水生环境中的重金属离子
背景重金属污染是一个全球性的环境问题。自还原策略操作简单,无需外部电沉积步骤,因此在重金属离子的吸附和电化学检测方面备受关注。因此,将基于自还原的吸附与电化学检测相结合至关重要。金属有机框架(MOFs)已成功应用于吸附和电化学检测。结果本文选择了含有大量氨基和电子丰富的芳香环成分的 2,4,6-三氨基嘧啶作为合成 Zn-MOFs 的有机配体,展示了其在重金属离子自还原吸附和电化学检测方面的功效。Zn-MOFs 对重金属离子的吸附速度很快,吸附容量大(铜(II) 4624 mg/g,汞(II) 4261 mg/g,铅(II) 4874 mg/g),同时在重金属离子的电化学检测中表现出较低的检测限(铜(II) 0.17 μg/L,汞(II) 0.25 μg/L,铅(II) 0.22 μg/L)。意义本研究制备了富含氨基的 Zn-MOFs 用于重金属离子的自还原吸附和电化学检测,为重金属离子的检测和去除提供了有前景的材料,为重金属离子的有效消除和快速检测提供了一种新的方法,为环境问题的处理和监测指出了一条有前景的道路。
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来源期刊
Analytica Chimica Acta
Analytica Chimica Acta 化学-分析化学
CiteScore
10.40
自引率
6.50%
发文量
1081
审稿时长
38 days
期刊介绍: Analytica Chimica Acta has an open access mirror journal Analytica Chimica Acta: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Analytica Chimica Acta provides a forum for the rapid publication of original research, and critical, comprehensive reviews dealing with all aspects of fundamental and applied modern analytical chemistry. The journal welcomes the submission of research papers which report studies concerning the development of new and significant analytical methodologies. In determining the suitability of submitted articles for publication, particular scrutiny will be placed on the degree of novelty and impact of the research and the extent to which it adds to the existing body of knowledge in analytical chemistry.
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