A Free-Metal Single Covalent Organic Framework Electrochemical Detective Platform for Sensitive Sensing of Carbendazim

Abstract

Carbendazim abuse in agriculture can lead to the residue in water and food, which may bring about adverse effects to human’s health. In this study, we reported the solvothermal synthesis of free-metal single TT-COF with one-step strategy and the TT-COF-based electrochemical sensor was fabricated for the further sensing of carbendazim. The TT-COF possessed high surface area, excellent conductivity and outstanding electrocatalytic activity. Therefore, the TT-COF/GCE was applied for the determination of carbendazim with CV and DPV techniques. This TT-COF/GCE sensor showed wide linear range of 0.005-5 μM and the low LOD of 2.21 nM towards the detection of carbendazim. More importantly, the projected TT-COF/GCE sensor demonstrated satisfactory recoveries by estimating carbendazim in apple, tomato and juice real samples.

Keywords: Covalent organic framework, Electrochemical detection, Sensor, Carbendazim