MnO2 nanoparticles enhance the activity of the Zr-MOF matrix electrochemical sensor for efficiently identifying ultra-trace tetracycline residues in food

IF 5.3 2区化学 Q1 CHEMISTRY, ANALYTICAL Microchimica Acta Pub Date : 2024-12-08 DOI:10.1007/s00604-024-06854-8

Siyu Tian, Jiahui Wang, Yu Jie, Zhu Ding, Xiao Wang, Jijiang Wang, Xiangyang Hou

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Abstract

A novel nanobiosensor was constructed by in situ locating nanometer MnO₂ particles with controllable size and morphology in a Zr-MOF substrate to serve as an electrochemical probe. The synergistic effect of the two components, Zr-MOFs with high specific surface area and compatibility as a carrier for MnO₂, resulted in improved electrochemical activity and excellent electrochemical identification performance for the MnO₂@Zr-MOF/GCE biosensor. Under optimized experimental conditions and using CV and DPV technology, the biosensor showed a wide linear detection range (2–200 μM), a low detection limit (2.577 × 10⁻⁸ M), a recovery range (106.26–115.01%), and maximum relative standard deviation (5.155) for tetracycline (TC) identification. The recognition mechanism of the sensor was investigated adopting Laviron adsorption theory. The applicability of the sensor was verified through practical measurements. Overall, the MnO₂ @Zr-MOF/GCE sensor possesses the advantages of fast analysis speed, high sensitivity, high selectivity, and simple operation, making it suitable for detecting trace amounts of TC in food.

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二氧化锰纳米颗粒增强了Zr-MOF基质电化学传感器的活性，可有效识别食品中超痕量四环素残留

通过在Zr-MOF衬底上原位定位尺寸和形貌可控的纳米二氧化锰作为电化学探针，构建了一种新型纳米生物传感器。具有高比表面积和相容性的zr - mof作为MnO2载体的协同作用，提高了MnO2@Zr-MOF/GCE生物传感器的电化学活性和优异的电化学识别性能。在优化的实验条件下，采用CV和DPV技术，该传感器对四环素（TC）的线性检测范围宽（2 ~ 200 μM），检出限低（2.577 × 10−8 M），回收率为106.26 ~ 115.01%，最大相对标准偏差为5.155。采用Laviron吸附理论对传感器的识别机理进行了研究。通过实际测量验证了传感器的适用性。总的来说，MnO2 @Zr-MOF/GCE传感器具有分析速度快、灵敏度高、选择性高、操作简单等优点，适用于食品中微量TC的检测。图形抽象

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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产品信息

阿拉丁

N,N-dimethylformamide

阿拉丁

C2H5OH

阿拉丁

polyvinyl pyrrolidone

阿拉丁

HCl

阿拉丁

KMnO4

阿拉丁

MnO2

阿拉丁

N,N-dimethylformamide

阿拉丁

C2H5OH

阿拉丁

polyvinyl pyrrolidone

阿拉丁

HCl

阿拉丁

KMnO4

阿拉丁

MnO2

来源期刊

Microchimica Acta 化学-分析化学

CiteScore

9.80

自引率

5.30%

发文量

410

审稿时长

2.7 months

期刊介绍： As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.