Electrochemical determination of benomyl using MWCNTs interspersed graphdiyne as enhanced electrocatalyst.

Autor: Shi M; Jiangxi Provincial Key Laboratory of Drug Design and Evaluation, Engineering Center of Jiangxi University for Fine Chemicals, Flexible Electronics Innovation Institute (FEII), School of Pharmacy, Jiangxi Science and Technology Normal University, Nanchang, 330013, People's Republic of China.; Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, College of Materials and Chemistry, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China., Xue SY; Jiangxi Provincial Key Laboratory of Drug Design and Evaluation, Engineering Center of Jiangxi University for Fine Chemicals, Flexible Electronics Innovation Institute (FEII), School of Pharmacy, Jiangxi Science and Technology Normal University, Nanchang, 330013, People's Republic of China., Peng GW; Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, College of Materials and Chemistry, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China., Xu JK; Jiangxi Provincial Key Laboratory of Drug Design and Evaluation, Engineering Center of Jiangxi University for Fine Chemicals, Flexible Electronics Innovation Institute (FEII), School of Pharmacy, Jiangxi Science and Technology Normal University, Nanchang, 330013, People's Republic of China., Gao YS; Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, College of Materials and Chemistry, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China., Liu SW; Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, College of Materials and Chemistry, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China., Duan XM; Jiangxi Provincial Key Laboratory of Drug Design and Evaluation, Engineering Center of Jiangxi University for Fine Chemicals, Flexible Electronics Innovation Institute (FEII), School of Pharmacy, Jiangxi Science and Technology Normal University, Nanchang, 330013, People's Republic of China. duanxuemin@126.com., Lu LM; Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, College of Materials and Chemistry, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China. lulimin816@hotmail.com.
Jazyk: angličtina
Zdroj: Mikrochimica acta [Mikrochim Acta] 2023 Feb 20; Vol. 190 (3), pp. 98. Date of Electronic Publication: 2023 Feb 20.
DOI: 10.1007/s00604-023-05684-4
Abstrakt: Graphdiyne (GDY) has attracted a lot of interest in electrochemical sensing application with the advantages of a large conjugation system, porous structure, and high structure defects. Herein, to further improve the sensing effect of GDY, conductive MWCNTs were chosen as the signal accelerator. To get a stable composite material, polydopamine (PDA) was employed as connecting bridge between GDY and MWCNTs-NH 2 , where DA was firstly polymerized onto GDY, followed by covalently linking MWCNTs-NH 2 with PDA through Michael-type reaction. The formed GDY@PDA/MWCNTs-NH 2 composite was then explored as an electrochemical sensor for benomyl (Ben) determination. GDY assists the adsorption and accumulation of Ben molecules to the sensing surface, while MWCNTs-NH 2 can enhance the electrical conductivity and electrocatalytic activity, all of which contributing to the significantly improved performance. The proposed sensor displays an obvious oxidation peak at 0.72 V (vs. Hg|Hg 2 Cl 2 ) and reveals a wide linear range from 0.007 to 10.0 µM and a low limit of detection (LOD) of 1.8 nM (S/N = 3) toward Ben detection. In addition, the sensor shows high stability, repeatability, reproducibility, and selectivity. The feasibility of this sensor was demonstrated by detecting Ben in apple and cucumber samples with a recovery of 94-106% and relative standard deviations (RSDs) less than 2.3% (n = 5). A sensitive electrochemical sensing platform was reported for benomyl (Ben) determination based on a highly stable GDY@PDA/MWCNTs-NH 2 composite.
(© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature.)
Databáze: MEDLINE
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