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Abstract: We present a facile strategy to prepare the molecularly imprinted polymers layer on the surface of Fe3O4 nanoparticles with core-shell structure via sol-gel condensation for recognition and enrichment of triclosan. The Fe3O4 nanoparticles were first synthesized by a solvothermal method. Then, template triclosan was self-assembled with the functional monomer 3-aminopropyltriethoxysilane on the silica-coated Fe3O4 nanoparticles in the presence of ethanol and water. Finally, the molecularly imprinted polymers were formed on the surface of silica-coated Fe3O4 nanoparticles to obtain the product. The morphology, magnetic susceptibility, adsorption, and recognition property of magnetic molecularly imprinted polymers were characterized using transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffractometry, vibrating sample magnetometry, and re-binding experiments. The magnetic molecularly imprinted polymers showed binding sites with good accessibility, fast adsorption rate, and high adsorption capacity (218.34 μg/g) to triclosan. The selectivity of magnetic molecularly imprinted polymers was evaluated by the rebinding capability of triclosan and two other structural analogues (phenol and p-chlorophenol) in a mixed solution and good selectivity with an imprinting factor of 2.46 was obtained. The application of triclosan removal in environmental samples was demonstrated
Template and target information: triclosan
Author keywords: environmental samples, magnetic separation, Molecularly imprinted polymers, Triclosan