Stable Metal Coordination Assisted Fe-Ni Double Hydroxides Surface
Imprinted Nanorods with High Adsorption Capacity
Abstract
Inspired by the stable interactions between metal ions and proteins,
high external surface iron-nickel double hydroxides (Fe-Ni LDH) derived
from metal-organic framework (MOFs) was selected as carriers to develop
high performance surface bovine serum albumin (BSA) imprinted
iron-nickel double hydroxides nanorods (Fe-Ni LDH@MIP). A hexagonal
hollow structure Fe-Ni LDH was synthesized with nanosheets stacked on
the surface by etching MIL-88A with Ni2+. The etching of Ni2+ increased
the surface roughness of MIL-88A and the rough surface of the carrier
was conducive to improving the anchorage amount of BSA, thus providing
more effective imprinting sites. Controlled coating of the imprinted
polymer layer on the surface of Fe-Ni LDH was obtained by aqueous phase
precipitation polymerization. The protein adsorption amount reached to
329.8 ± 7.8 mg/g in 60 min with an imprinting factor of 2.86. The
experimental showed that Fe-Ni LDH@MIP had good selectivity and
stability, which enriched the protein imprinting materials.