Preparation and characterization of surface molecularly imprinted film coated on a magnetic nanocore for the fast and selective recognition of the new neonicotinoid insecticide paichongding (IPP)

In this work, we present a general method to prepare surface molecularly imprinted film on a magnetic nanocore for new neonicotinoid insecticide paichongding (IPP) recognition. First, magnetic Fe 3 O 4 nanoparticles were synthesized by a hydrothermal method and coated with SiO 2 on the surface, then...

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Bibliographic Details
Published in:RSC advances 2016-01, Vol.6 (5), p.3714-3722
Main Authors: Zhang, M, Zhao, H. T, Yang, X, Zhang, W. T, Wang, J, Liu, G. Y, Zhang, H, Dong, A. J
Format: Article
Language:English
Subjects:
Adsorption
Fourier transforms
Infrared spectroscopy
Insecticides
Nanostructure
Polypropylenes
Recognition
Surface chemistry
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Summary:In this work, we present a general method to prepare surface molecularly imprinted film on a magnetic nanocore for new neonicotinoid insecticide paichongding (IPP) recognition. First, magnetic Fe 3 O 4 nanoparticles were synthesized by a hydrothermal method and coated with SiO 2 on the surface, then were vinyl-modified to be Fe 3 O 4 @SiO 2 @C&z.dbd;C which was the magnetic core. After that, magnetic molecularly imprinted nanoparticles (MMIPs) were synthesized by surface-imprinted polymerization in airtight tubes at 60 °C for 24 h, using IPP as the template, methacrylic acid as the functional monomer and ethylene glycol dimethacrylate as cross-linkers. The resulting IPP-MMIPs possess specific recognition ability, fast adsorption kinetics, high adsorption capacity, and can be easily collected under an external magnetic field. The IPP-MMIPs were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), X-ray diffraction (XRD) and vibrating sample magnetometry (VSM). The binding experiments showed a relatively high adsorption capacity (17.30 mg g −1 ) and specific recognition ability over structurally related compounds. Therefore, IPP-MMIPs have the potential to become a sensitive and selective approach for IPP recognition and separation. The selective recognition of IPP-MMIPs and IPP-MNIPs for four kinds of neonicotinoid insecticides, including IPP, imidacloprid, thiamethoxam and thiacloprid.
ISSN:2046-2069
2046-2069
DOI:10.1039/c5ra22138b