The coordination effect of organic ligands in Ce-MOF brings about atomically dispersed Fe in CeO2 for TAC detection in commercial samples

IF 5.6 1区化学 Q1 CHEMISTRY, ANALYTICAL

Talanta Pub Date : 2024-12-16 DOI:10.1016/j.talanta.2024.127405

Lulu Cui , Houshen Li , Weijie Shi , Yingying Jing , Shuhong Sun , Shiyun Ai , Zeyi Guo

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Abstract

Reducing the size of active species is a powerful means to improve the utilization rate of active metals and enhance the properties of bimetallic nanozymes. In this work, Fe was introduced into Ce-MOF through the coordination of Fe³⁺ and organic ligands, and the coordination effect resulted in atomically dispersed Fe in the derived Fe/CeO₂ nanozyme. Due to the atomically dispersed Fe embedded in the lattice of CeO₂, a large number of defect sites were generated, endowing the nanozyme with excellent peroxidase (POD)-like activity. The constructed total antioxidant capacity (TAC) sensor based on the POD-like activity of Fe_1.01/CeO₂ nanozyme displayed a very wide linear concentration range for AA, Cys, Glu and Trolox. More importantly, this TAC sensor can be applied to the TAC detection in vitamin C tablets and beverages. This work provides theoretical guidance for the synthesis of high-performance bimetallic nanozymes for TAC detection.

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Ce-MOF 中有机配体的配位效应使 Fe 原子分散在 CeO2 中，用于检测商业样品中的 TAC。

减小活性种的大小是提高活性金属利用率和增强双金属纳米酶性能的有力手段。本研究通过Fe3+与有机配体的配位将Fe引入到Ce-MOF中，这种配位效应导致Fe在衍生的Fe/CeO2纳米酶中原子分散。由于原子分散的Fe嵌入在CeO2的晶格中，产生了大量的缺陷位点，使纳米酶具有优异的过氧化物酶（POD）样活性。基于Fe1.01/CeO2纳米酶pod样活性构建的总抗氧化能力（TAC）传感器对AA、Cys、Glu和Trolox具有很宽的线性浓度范围。更重要的是，该TAC传感器可用于维生素C片剂和饮料中TAC的检测。本研究为合成用于TAC检测的高性能双金属纳米酶提供了理论指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Talanta 化学-分析化学

CiteScore

12.30

自引率

4.90%

发文量

861

审稿时长

29 days

期刊介绍： Talanta provides a forum for the publication of original research papers, short communications, and critical reviews in all branches of pure and applied analytical chemistry. Papers are evaluated based on established guidelines, including the fundamental nature of the study, scientific novelty, substantial improvement or advantage over existing technology or methods, and demonstrated analytical applicability. Original research papers on fundamental studies, and on novel sensor and instrumentation developments, are encouraged. Novel or improved applications in areas such as clinical and biological chemistry, environmental analysis, geochemistry, materials science and engineering, and analytical platforms for omics development are welcome. Analytical performance of methods should be determined, including interference and matrix effects, and methods should be validated by comparison with a standard method, or analysis of a certified reference material. Simple spiking recoveries may not be sufficient. The developed method should especially comprise information on selectivity, sensitivity, detection limits, accuracy, and reliability. However, applying official validation or robustness studies to a routine method or technique does not necessarily constitute novelty. Proper statistical treatment of the data should be provided. Relevant literature should be cited, including related publications by the authors, and authors should discuss how their proposed methodology compares with previously reported methods.

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