MXene@Ag-based ratiometric electrochemical sensing strategy for effective detection of carbendazim in vegetable samples

•A novel dual-ratiometric electrochemical sensor was proposed for CBZ detection.•AgNCs serve as both interlayer spacers for MXene and reference electrochemical probe.•The combination of MXene@AgNCs and NH2-MWCNTs displays a favorable synergetic effect.•This sensor achieved high sensitivity and selec...

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Bibliographic Details
Published in:Food chemistry 2021-10, Vol.360, p.130006-130006, Article 130006
Main Authors: Zhong, Wei, Gao, Feng, Zou, Jin, Liu, Shuwu, Li, Mingfang, Gao, Yansha, Yu, Yongfang, Wang, Xiaoqiang, Lu, Limin
Format: Article
Language:English
Subjects:
Ag nanoclusters
Carbendazim
MXene
Ratiometric electrochemical sensor
Synergistic effect
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Summary:•A novel dual-ratiometric electrochemical sensor was proposed for CBZ detection.•AgNCs serve as both interlayer spacers for MXene and reference electrochemical probe.•The combination of MXene@AgNCs and NH2-MWCNTs displays a favorable synergetic effect.•This sensor achieved high sensitivity and selectivity for the detection of CBZ.•The method was successfully employed for CBZ detection in vegetable samples. In this paper, a novel ratiometric electrochemical sensor for carbendazim (CBZ) detection was constructed by a composite of MXene@Ag nanoclusters and amino-functionalized multi-walled carbon nanotubes (MXene@AgNCs/NH2-MWCNTs). The Ag nanoclusters (AgNCs) embedded in the MXene not only could inhibit the aggregation of MXene flakes and enhance the electrocatalytic ability, but also serve as an internal reference probe for the ratiometric electrochemical detection. Moreover, the introduction of NH2-MWCNTs can further improve the electrochemical signals of CBZ and Ag, resulting in the enhanced signal amplification and higher sensitivity. Based on these characteristics of the MXene@AgNCs/NH2-MWCNTs composite, the proposed sensor exhibits a favorable linear relationship between ICBZ/IAgNCs and the concentration of CBZ ranging from 0.3 nM to 10 μM and a low limit of detection of 0.1 nM. Moreover, the proposed ratiometric electrochemical sensing platform also demonstrates high selectivity, good reproducibility, secular stability, and satisfactory applicability in vegetable samples.
ISSN:0308-8146
1873-7072
DOI:10.1016/j.foodchem.2021.130006