Scalable one-step fabrication of integrated electrode arrays for highly sensitive and portable carbendazim detection

Lingbo Liu; Keni Zeng; Fang Chen; Fei Li; Junxing Hao; Kangbing Wu

doi:10.1016/j.foodchem.2025.142906

Scalable one-step fabrication of integrated electrode arrays for highly sensitive and portable carbendazim detection

Food Chem. 2025 Jan 17:472:142906. doi: 10.1016/j.foodchem.2025.142906. Online ahead of print.

Authors

Lingbo Liu¹, Keni Zeng², Fang Chen², Fei Li¹, Junxing Hao³, Kangbing Wu⁴

Affiliations

¹ Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Province Key Laboratory of Biotechnology of Chinese Traditional Medicine, College of Health Science and Engineering, Hubei University, Wuhan 430062, China.
² School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
³ Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Province Key Laboratory of Biotechnology of Chinese Traditional Medicine, College of Health Science and Engineering, Hubei University, Wuhan 430062, China. Electronic address: jxhao@hubu.edu.cn.
⁴ Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Province Key Laboratory of Biotechnology of Chinese Traditional Medicine, College of Health Science and Engineering, Hubei University, Wuhan 430062, China; School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; HuaShan Technology Company Limited, Qianjiang 433136, China. Electronic address: kbwu@hust.edu.cn.

PMID: 39848039
DOI: 10.1016/j.foodchem.2025.142906

Abstract

Highly sensitive and portable pesticide residues detection are indispensable for safeguarding food safety and environmental health. Herein, we introduce a one-step vacuum filtration strategy for the scalable production of cobalt-based conjugated coordination polymers (CoCCPs) electrode arrays, utilizing carboxylated single-walled carbon nanotubes (c-SWNTs) as bonding bridges (CoCCPs@c-SWNTs). Due to their abundant active sites and high conductivity, the CoCCPs@c-SWNTs arrays exhibit superior electrochemical performance (e.g., active area, charge transfer capacity, adsorbed charge, etc.) and enhanced electrocatalytic activity for carbendazim (CBZ). Benefiting from the homogeneous and twining interface, the CoCCPs@c-SWNTs arrays also demonstrate good repeatability, reproducibility, and stability (relative standard deviations <5 %). The CoCCPs@c-SWNTs sensor, with a linear range of 0.01-4.0 μM and a detection limit of 1.9 nM, has been successfully employed in tea and strawberry samples. Overall, this novel sensor holds great potential for application in rapid on-site detection of pesticide residues.

Keywords: Carbendazim residue; Conjugated coordination polymer; Integrated electrode array; Portable detection; Scalable preparation.