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Reference type: Journal
Authors: Zhang M, Zhao HT, Xie TJ, Yang X, Dong AJ, Zhang H, Wang J, Wang ZY
Article Title: Molecularly imprinted polymer on graphene surface for selective and sensitive electrochemical sensing imidacloprid.
Publication date: 2017
Journal: Sensors and Actuators B: Chemical
Volume: 252
Page numbers: 991-1002.
DOI: 10.1016/j.snb.2017.04.159
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0925400517307694

Abstract: A novel and simple imprinting route based on graphene (GN) was proposed to fabricate an electrochemical sensor for sensitive and selective determination of imidacloprid (IDP) residue. In this route, p-vinylbenzoic acid (VBA) was utilized as functional monomer to immobilize onto GN in N,N-dimethylformamide (DMF) solvent via π-π interaction, directing the polymerization of uniform molecularly imprinted polymers (MIP) layers on the surface of GN sheets. Besides, quantitative control of the synthesis of MIP/GN and the preparation of MIP/GN modified glassy carbon electrode (GCE) were carried out, which were rarely found in other papers. Thus, the proposed sensor possesses highly improved stability and specific recognition ability. The adsorption isotherm study indicated that the MIP layer on GN surface is monolayer and the structure is homogeneous. The peak current of IDP on MIP/GN modified GCE is linear with IDP concentration in the range of 0.5-15 μM with a detection limit of 0.10 μM. In addition, the novel method was further applied to detect IDP in brown rice samples with satisfactory results
Template and target information: imidacloprid
Author keywords: Imidacloprid, Molecularly imprinted graphene, Electrochemical sensor, determination


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