Core–Shell Magnetic Molecularly Imprinted Polymer Prepared for Selectively Removed Indole from Fuel Oil

Abstract

Magnetic molecularly imprinted polymers (MMIPs) were synthesized for selective recognition and rapid enrichment of indole from a model fuel. The MMIPs were synthesized by precipitation polymerization and a surface molecular imprinting technique, using indole as the template molecule, Fe 3 O 4 nanoparticles as magnetically susceptible components, methylacrylic acid as the functional monomer, and ethylene glycol dimethacrylate as a cross-linker. The properties of the MMIPs were characterized by Fourier-transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, vibrating sample magnetometry, and thermogravimetric analysis. The adsorption capacity of indole-molecularly imprinted polymers (MIPs) was 50.25 mg g −1 at 303 K and reached adsorption equilibrium in a short time. Experimental data were modeled with a pseudo-second-order, Langmuir isotherm model. The selective adsorption performance of MIPs was favorable. C 2015 Wiley Periodicals, Inc. Adv Polym Technol 2015, 0, 21596; View this article online at wileyonlinelibrary.com.

Preparation of magnetic molecularly imprinted polymers for selective extraction of xylazine in milk

“…3d–f, which list the corresponding parameters and R 2 obtained by fitting the pseudo‐first‐order and pseudo‐second‐order kinetic models. The results show that the adsorption kinetics of xylazine by MMIPs and MNIPs fit the pseudo‐second‐order kinetic model better, and the R 2 of the adsorption kinetics of xylazine by MMIPs and MNIPs reach 0.9807 and 0.9774, respectively, which is higher than that of the pseudo‐first‐order kinetic model (Yang et al ., 2017). This also indicates that the adsorption of xylazine by MMIPs belongs to chemisorptions (Ji et al ., 2021), and the theoretical equilibrium adsorption capacity of xylazine is 4.4783 mg g −1 , which is also close to the experimental results (4.2017 mg g −1 ).…”

The selective recognition mechanism of a novel highly hydrophobic ion-imprinted polymer towards Cd(ii) and its application in edible vegetable oil

“…The Langmuir adsorption isotherm is a monolayer adsorption model that assumes that the affinity ability of all binding sites is equivalent. 28 Thus, the distribution of binding sites for the IIP@RS binding to Cd(II) was homogenous, with monolayer adsorption. Moreover, the theoretical adsorption capacities of IIP@RS (42.63 mg g À1 ) and NIP@RS (13.62 mg g À1 ) calculated by the Langmuir model were close to their experimental binding capacities.…”

Recent Progress of Imprinted Nanomaterials in Analytical Chemistry

“…In another research by Yang et al, core-shell magnetic MIPs were prepared for selective removal of indole from fuel oil [ 121 ]. In their research, magnetic Fe 3 O 4 nanoparticles were synthesized by using coprecipitation technique.…”