Composites of multiwalled carbon nanotubes/polyethyleneimine (MWCNTs/PEI) and molecularly imprinted polymers for dinitrotoluene recognition
文献类型： 外文期刊
作者： Nie, Dongxia 1 ; Han, Zheng 1 ; Yu, Yanyan 2 ; Shi, Guoyue 3 ;
作者机构： 1.Shanghai Acad Agr Sci, Inst Agrofood Stand & Testing Technol, Shanghai 201403, Peoples R China
2.Xuzhou Med Coll, Dept Pharmaceut Anal, Xuzhou 221004, Peoples R China
3.E China Normal Univ, Dept Chem, Shanghai 200241, Peoples R China
关键词： Dinitrotoluene;Molecular imprinting;MWCNTs;PEI;Electrochemical sensor
期刊名称：SENSORS AND ACTUATORS B-CHEMICAL （ 影响因子：7.46； 五年影响因子：6.743 ）
ISSN：
年卷期：
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收录情况： SCI
摘要： In this work, a novel strategy for the imprinting of 2,4-dinitrotoluene (DNT) molecule on the surface of functionalized multiwalled carbon nanotubes/polyethyleneimine (Fun-MWCNTs/PEI) was proposed and developed to prepare a highly selective DNT-imprinted electrochemical sensor. The electrochemical characteristics of the fabricated Fun-MWCNTs/PEI-MIPs sensor were investigated by cyclic voltammetry and differential pulse voltammetry in detail. Experimental results demonstrated that the Fun-MWCNTs/PEIMIPs modified electrode exhibited an excellent electrocatalytic activity to DNT and the current responses were found to be in a good linear range from 2.2 x 10(-9) mol/L to 1.0 x 10(-6) mol/L with the detection limit of 1.0 x 10(-9) mol/L (S/N= 3). Additionally, in comparison with other similar nitroaromatic compounds, a satisfactory selectivity toward DNT determination was also obtained due to the appearance of abundant effective imprinted sites at the surface or in the proximity of Fun-MWCNTs/PEI-MIPs films. In short, the surface molecular imprinted strategy presented in the current work developed a new way for the rapid, sensitive and selective measurement of trace DNT, which would exhibit a prospective in the on-line monitoring of nitroaromatic compounds (NACs) in the fields of industry and environmental monitoring. (C) 2015 Elsevier B.V. All rights reserved.
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