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Supramolecular imprinted sensor for carbofuran detection based on a functionalized multiwalled carbon nanotube-supported Pd-Ir composite and methylene blue as catalyst

文献类型： 外文期刊

作者： Li, Shuhuai 1 ; Yin, Guihao 1 ; Wu, Xuejin 1 ; Liu, Chunhua 1 ; Luo, Jinhui 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Anal & Test Ctr, Haikou 571101, Peoples R China

2.Hainan Prov Key Lab Qual & Safety Trop Fruits & V, Haikou 571101, Peoples R China

关键词： Supramolecular;Molecular imprinted;4-tert-butylcalix[8]arene;Nanocomposite;Carbofuran

期刊名称：ELECTROCHIMICA ACTA （ 影响因子：6.901； 五年影响因子：6.016 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： 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-lr) 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. (C) 2015 Elsevier Ltd. All rights reserved.

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