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Issue 43, 2016, Issue in Progress
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Molecularly imprinted star polymer-modified superparamagnetic iron oxide nanoparticle for trace level sensing and separation of mancozeb

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Abstract

In this study, we developed a novel and economical electrochemical sensor to detect and remove mancozeb (a pesticide) from soil and vegetable samples using superparamagnetic iron oxide nanoparticles (SPIONs) and molecularly imprinted star polymers (MISP). The imprinted star polymer was coated on the surface of the magnetic core using a surface imprinting approach. For this, first, the SPIONs were synthesized by a hydrothermal method and then coated with vinyl silane, which is used as a platform for synthesis of mancozeb-imprinted polymers (MISPs). The resulting MISPs possess specific recognition ability, high adsorption capacity, and can be easily extracted from complex matrices under an external magnetic field. The MISPs were well characterized by field emissive scanning electron microscopy (FE-SEM), Fourier transform infrared (FT-IR), dynamic light scattering (DLS), X-ray diffraction (XRD) and vibrating sample magnetometry (VSM) studies. Under the carefully optimized experimental conditions, the sensor presented good electrochemical response for mancozeb in the range from 5.96 to 257.0 μg L−1 and its detection limit was calculated as 0.96 μg L−1 (S/N = 3). In addition, the prepared MISPs show very good adsorption capacity for mancozeb. This shows that fabricated MISPs have great potential to become a selective and sensitive approach for trace level detection as well as removal of pesticide or insecticides.

Graphical abstract: Molecularly imprinted star polymer-modified superparamagnetic iron oxide nanoparticle for trace level sensing and separation of mancozeb

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Publication details

The article was received on 03 Feb 2016, accepted on 29 Mar 2016 and first published on 13 Apr 2016


Article type: Paper
DOI: 10.1039/C6RA03204D
RSC Adv., 2016,6, 36751-36760

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    Molecularly imprinted star polymer-modified superparamagnetic iron oxide nanoparticle for trace level sensing and separation of mancozeb

    S. Kumar, P. Karfa, S. Patra, R. Madhuri and P. K. Sharma, RSC Adv., 2016, 6, 36751
    DOI: 10.1039/C6RA03204D

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