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| Preparation of ferromagnetic nanomaterials based on molecular imprinting technology and their performance for selective enrichment of 17β-estradiol (E2) |
| GUAN An-zhe, ZHAO Xu-dong, ZHANG Ting-ting, LI Yi, LI Jian-sheng, LU Rui |
| School of Environment and Biological Engineering, Nanjing University of Science & Technology, Nanjing 210094, China |
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Abstract Ferromagnetic separation and molecular imprinting technology were combined together. Ferromagnetic oxide nanoparticles were used as core, while 17β-estradiol (E2) was used as the template molecule and (3-Aminopropyl) triethoxysilane was used as the functional monomer E2 molecularly imprinted polymer (MIPs) and non-imprinted polymer (NIPs) were prepared by surface polymerization. Then E2MIPs and NIPs were characterized by FT-IR, XRD, XPS, SEM and other methods. The results showed that MIPs have a regular spherical shape, and the particle size is uniform at about 790nm. In the selective adsorption experiment, the saturated adsorption capacity of MIPs and NIPs for E2 is 9.69 and 6.25mg/g, respectively. These results indicated good selectivity of the material. Freundlich linear fitting was performed on the static adsorption data, and the results proved that MIPs have good adsorption capacity. Meanwhile, MIPs showed excellent reusability as the adsorption capacity only lost 3% after 7 adsorption-desorption processes.
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Received: 27 May 2021
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