Supramolecular imprinted sensor for carbofuran detection based on a functionalized multiwalled carbon nanotube-supported Pd-Ir composite and methylene blue as catalyst. (10th January 2016)

• Record Type: Journal Article
• Authors: Li, Shuhuai; Yin, Guihao; Wu, Xuejin; Liu, Chunhua; Luo, Jinhui
• Is Part Of: Electrochimica acta. Volume 188(2016)
• Page Start: 294
• Page End: 300
• Publication Date: 2016-01-10
• Subjects: Supramolecular -- Molecular imprinted -- 4-tert-butylcalix[8]arene -- Nanocomposite -- Carbofuran; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.12.010
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: A novel supramolecular imprinted electrochemical sensor was developed for carbofuran (CBF) determination based on a multiwalled carbon nanotube-supported Pd-Ir nanocomposite catalyst (MWCNT/Pd-Ir) with methylene blue (MB) signal amplification. First, MWCNT/Pd-Ir composite nanoparticles were synthesized and used to modify the surface of a glassy carbon electrode; then, a molecular imprinted polymer for CBF was prepared by electropolymerization, with MB-doped o -phenylenediamine as the functional monomer and a 4-tert-butylcalix[8]arene-CBF (4TB[8]A-CBF) supramolecular complex as the template. The electrical signals were controlled though the elution and re-adsorption of CBF. Due to the double catalysis by the MWCNT/Pd-Ir and MB, the current intensity for CBF was obviously amplified. Additionally, because of the double recognition by the 4TB[8]A and MIP, the sensors showed outstanding CBF identification properties. The method was applied to detect CBF in agricultural products, and the satisfactory results were obtained.