基于钴基金属有机骨架构建的电化学传感器检测百草枯

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中图分类号：S48 文献标志码：A 文章编号：1671-4652（2026）01-0138-09

Detection of paraquat based on cobalt metal-organic framework electrochemical sensor

WU Xiangmei¹，HOU Qiaozhi² （1. College of Food Engineering， Shangqiu Polytechnic， Shangqiu 476ooo， China; 2. Puyang Institute of Technology，Henan University， Puyang 457Ooo，China）

ABSTRACT：A novel electrochemical sensor was constructed for the rapid quantitative analysis of paraquat （PQ）.A new type of metal-organic framework composite nanomaterial-aminoated cobalt metal organic framework @ gold nanocomposite material （ ΔNH2-Co-MOF（OAu） was prepared by hydrothermal synthesis method，and it was coating immobilized on the surface of the glassy carbon electrode（GCE） to enhance the sensitivity of the sensor. NH2-Co-MOF@Au was characterized by electrochemical analysis and scanning electron microscopy，and the optimal working conditions of NH2-Co-MOF@ Au/GCE were determined，the anti-interference，stabilityand repeatability of the sensor were also studied.The result showed that NH2 -Co-MOF @ Au had a good enrichment and catalytic effect on PQ，which could improve the sensitivity of NH2-CoMOF@Au/GCE significantly. Under the optimal conditions，the concentration of PQ and the reduction peak current showed a linear relationship in the range of 0. 01～1. 0 and 1.0～15μmol⋅L-1 respectively，with a detection limit of 1.53nmol⋅L-1 .The results of detecting PQ in baby cabbage using NH2-Co-MOF@Au/GCE were consistent with HPLC，and it had good anti-interference and stability. Overall NH2-Co-MOF@Au/GCE was simple，rapid，low-cost， and NH2-Co-MOF@AΩ 1 could be recycled and reused.

KEY WORDs： electrochemical sensor;cobalt based metal-organic framework； paraquat; detection百草枯（paraquat，PQ）学名为N， N′ -二甲基-4， 4′ -联吡啶二氯化物和二硫酸甲酯，是一种广谱性除草剂，较其他常用的草甘麟、敌草快等具有更高的除草效率，曾在农业生产中被广泛应用[1]。（剩余16449字）