Reference type: Journal
Authors: Dai JD, Pan JM, Xu LC, Li XX, Zhou ZP, Zhang RX, Yan YS
Article Title: Preparation of molecularly imprinted nanoparticles with superparamagnetic susceptibility through atom transfer radical emulsion polymerization for the selective recognition of tetracycline from aqueous medium.
Publication date: 2012
Journal: Journal of Hazardous Materials
Volume: 205 - 206
Issue: (1)
Page numbers: 179-188.
DOI: 10.1016/j.jhazmat.2011.12.056
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0304389411015615

Abstract: In the work, we reported an effective method for the preparation of molecularly imprinted nanoparticles with superparamagnetic susceptibility through atom transfer radical emulsion polymerization (ATREP), and then as-prepared magnetic molecularly imprinted nanoparticles (MMINs) were evaluated as adsorbents for selective recognition of tetracycline (TC) molecules from aqueous medium. The resulting nanoparticles were characterized by FT-IR, TGA, VSM, SEM and TEM. The results demonstrated MMINs with a narrow diameter distribution were cross-linked with modified Fe3O4 particles, composed of imprinted layer and exhibited good magnetic sensitivity, magnetic and thermal stability. Batch rebinding studies were carried out to determine the specific adsorption equilibrium, kinetics, and selective recognition. The estimated adsorption capacity of MMINs towards TC by the Langmuir isotherm model was 12.10 mg g-1 at 298 K, which was 6.33 times higher than that of magnetic non-molecularly imprinted nanoparticles (MNINs). The kinetic property of MMINs was well-described by the pseudo-second-order rate equation. The results of selective recognition experiments demonstrated outstanding affinity and selectivity towards TC over competitive antibiotics. The reusability of MMINs showed no obviously deterioration at least five repeated cycles in performance. In addition, the MMINs prepared were successfully applied to the extraction of TC from the spiked pork sample
Template and target information: tetracycline, TC
Author keywords: Magnetic molecularly imprinted nanoparticles, Atom transfer radical emulsion polymerization, selective recognition, Aqueous medium, Tetracycline