A sensitive electrochemical sensor for nitenpyram detection based on CeO2/MWCNTs nanocomposite

• Published in: Applied physics. A, Materials science & processing Vol. 128; no. 9
• Main Authors: Ai, Jixing, Wang, Xin, Zhang, Yan, Hu, Huali, Zhou, Huanxi, Duan, Yu, Wang, Dexiang, Wang, Hong, Du, Haijun, Yang, Yang
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.09.2022; Springer Nature B.V
• Subjects: Applied physics; Cerium oxides; Characterization and Evaluation of Materials; Chemical sensors; Condensed Matter Physics; Electrochemical oxidation; Insecticides; Machines; Manufacturing; Materials science; Multi wall carbon nanotubes; Nanocomposites; Nanotechnology; Optical and Electronic Materials; Physics; Physics and Astronomy; Processes; Sensors; Stability; Surfaces and Interfaces; Thin Films; Multiwall carbon nanotubes; Electrochemical determination; nanoparticles; Nitenpyram; Neonicotinoid insecticides; CeO
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-022-05952-9

Neonicotinoid insecticides are widely applied to improve the quality and yield of the crop. A sensitive and highly selective electrochemical sensor is required for monitoring their residues. In this paper, nano-structured cerium oxide and multiwall carbon nanotube composite (MWCNTs) were successfully constructed as an electrochemical sensor for nitenpyram (NIT) determination. The developed sensor has a broad linear range from 2 to 180 μM and a low detection limit of 0.72 μM (S/N = 3) for NIT detection under the optimal ratio of 1:1 between CeO 2 and MWCNTs. The electrochemical oxidation process of NIT involves one proton and two electron. Moreover, this developed sensor has excellent reproducibility with a relative standard deviation (RSD) of 3.1% in six replicated measurements, and excellent stability with 92.95% current retention after 15 days. In addition, the modified electrode has a good sensitivity and stability for the measurement of NIT in actual samples, it has the recovery ranges of 90.60–97.78% for the determination of NIT in corn extraction and 90.06–114.4% for that of NIT in river water. The proposed CeO 2 /MWCNTs sensor exhibits a great potential for the quick detection of neonicotinoid insecticides in the agricultural industry.