The preparation and removal performance of carbamazepine/oxcarbazepine double template magnetic molecularly imprinted polymers

Core–shell magnetic‐modified molecular imprinted polymer (Fe3O4@SiO2@MIP) for dihydroartemisinin recognition and separation

“…This data confirmed that core–shell magnetic had contributed to particle shape and homogeneity. The same findings had been reported by previous research 30,31 …”

“…However, the adsorption rate was slow down after 90 min because the intermolecular repulsion on the polymer surface increased which induced mass transfer resistance enlargement and saturation of active site. 19,30 The adsorption rate (α) of Elovich model confirmed that Fe 3 O 4 @SiO 2 @MIP has a higher affinity to DHA than Fe 3 O 4 @SiO 2 @NIP. This has explained that the specific vacant surface plays a significant role in adsorption process meanwhile, adsorption by Fe 3 O 4 @SiO 2 @NIP is occurred in random interaction with polymer.…”

“…The surface area of Fe 3 O 4 @SiO 2 @MIP was higher than Fe 3 O 4 @SiO 2 @NIP due to the imprinting effect of DHA onto MIP surface. 19,30,[37][38][39] Based on pore diameter size, the obtained materials owned mesoporous structure. capacity of Fe 3 O 4 @SiO 2 @MIP and Fe 3 O 4 @SiO 2 @NIP decreased as pH increased from 4 to 10.…”

“…The same findings had been reported by previous research. 30 T A B L E 1 Isotherm parameters of DHA sorption onto core-shell magnetic MIP and NIP.…”

“…The imprinted cavities reduce mass transfer resistance so that the adsorption capacity rises. 30,31,43 The intraparticle diffusion constant (k diff ) denotes that the adsorption process is consisted of external mass transfer and intraparticle diffusion. The external mass transfer contributed to a rapid adsorption rate at the first 90 min due to the availability of imprinted cavities and low mass transfer resistance.…”