Magnetic Molecularly Imprinted Polymers Based on a Green Synthesis Strategy for Magnetic Solid-phase Extraction of Profenofos
Using water as the solvent,profenofos(PFF)as the template molecule,chitosan as the functional monomer,and glutaraldehyde as the cross-linking agent,PFF magnetic molecularly imprinted polymers(PFF-MMIPs)with high sensitivity and selectivity were successfully prepared employing the green chemistry concept.Meanwhile,scanning electron microscopy,Fourier transform infrared spectroscopy,and X-ray diffractometer were used to characterize the polymers.In addition,the adsorption properties and selectivity of PFF-MMIPs were investigated.The results showed that the PFF-MMIPs had strong magnetic properties,good thermal stability,high adsorption capacity(33.6 mg·g-1),rapid adsorption capacity(60 min),and efficient selectivity.Furthermore,the PFF-MMIPs adsorption process on the target molecule PFF was also consistent with the Langmuir isotherm model and the pseudo-second kinetic model,according to mathematical fitting of the adsorption performance data.
Magnetic molecularly imprinted polymersGreen synthesis strategyProfenofosChitosan
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