Selective adsorption of zearalenone by a novel magnetic molecularly imprinted carbon nanomaterial

Abstract

Abstract In this paper, The objective is to immobilise molecularly imprinted polymers (MIPs) onto the surface of Magnetic carbon nanoparticles(Fe3O4@SiO2@C) for adsorption of Zearalenone (ZEN) provides an effective method. Synthesized MIPs by using warfarin as dummy templates of zearalenone, The functional monomer is 3-aminopropyl triethoxysilane (APTES), and the cross-linker is tetraethyl orthosilicate (TEOS). The carrier employed for the synthesis of magnetic molecularly imprinted polymers (MMIPs) was Fe3O4@SiO2@C. The materials were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometer (VSM), Laser particle size analyzer, Scanning electron microscope(SEM), and thermogravimetric analysis (TGA). The results indicate that the particle size of MMIPs is approximately 27.31 µm. In addition, adsorption capacity of MMIPs was compared with MNIPs, The saturated adsorption capacity of MMIPs was 1.56mg/g, and that of MNIP was 0.86mg/g. The Scatchard analysis revealed the presence of two distinct binding sites in MMIPs.The limit of detection (LOD) and limit of quantitation (LOQ) in actual sample testing were 0.3 mg/L and 0.9mg/L respectively. The recovery of corn with standard addition of ZEN was 73.6%- 88.1%, and the relative standard deviation (RSD) was 2.86% − 5.63%. The results demonstrated that MMIPs possess the advantages of straightforward operation, high precision, and cost-effectiveness, rendering them suitable for rapid ZEN detection..