A highly-controllable core-shell silica-MIPs absorbent by anchoring a MIPs layer to the surface of SiO2 nanoparticles via a
surface molecular imprinting process was prepared. The templates were
covalently modified with functional monomers to form precursor EstSi. The latter
together with coupling reagent KH-570, were grafted onto the surface of SiO2 nanoparticles before polymerization, to ensure the quantity and quality of
imprinted sites on the surface of the covalently attached matrix. The
as-synthesized core-shell nanomaterials (SiO2@MIP2) were then
evaluated for selective adsorption of 17β-estradiol
(E2) with Raman spectra as detection method. The results indicate that SiO2@MIP2
can fast and selectively adsorb E2 from structural analogues, with detection
limit of 0.01 μmol/l.
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