Synthesis of Surface Molecular Imprinted Polymer Based on Silica Nanoparticles and Adsorption Properties of Methyl Parathion
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Abstract:
Hybrid organic-inorganic surface imprinted silica nanoparticles for specific recognition of methyl parathion was prepared by molecular imprinting technique, We molecularly imprinted silica nanoparticles in chloroform by using amino modified silica nanoparticles as the supports, acrylamide as the functional monomer, γ-methacryloxypropyl trimethoxy silane as the grafting agent, and methyl parathion as a template. The amino propyl functional monomer could not only selectively polymerize on silicon surface, but also as an assistive monomer to drive the template agent into the formed shell structure to produce effective specific recognition sites. The resultant MIPs-SiO2 nanoparticles display a three-dimensional core-shell structure and a large surface area. The molecularly imprinted polymer shell structure provided recognition sites for methyl parathion, making it have a strong selective adsorption capacity for the template, Traces of methyl parathion were selectively extracted from green vegetable and pear samples using MIPs-SiO2 nanoparticles as the sorbents of solid-phase dispersion extraction with recoveries of 84.7~94.4%.
