发布时间：2025-10-16

论文名称：Fabrication of tailored imprinted layer and cladded layer on magnetic nanomaterials with enhanced specificity for recognition of PFOS

发表刊物：ANALYTICA CHIMICA ACTA

摘要：Background: Perfluorooctane sulfonate (PFOS) is a persistent organic pollutant with significant risks to ecosystems and human health. Magnetic molecularly imprinted polymers (MIPs) provide a promising solution for selectively extracting PFOS from contaminated water. However, while bifunctional monomer imprinting improves the imprinting effect by introducing diverse functional groups, it can also increase non-specific adsorption. To address this problem, a surface cladding strategy was applied after polymerization, forming an inert cladding layer to reduce non-specific binding and improve specificity. Results: The magnetic MIPs with a cladding layer (Fe3O4@PFOS-cMIPs) exhibited enhanced adsorption performance, achieving a high adsorption capacity of 135.1 mg g- 1, an imprinting factor of 3.19, and a selectivity factor greater than 1.3, surpassing most reported PFOS-MIPs. The interactions between Fe3O4@PFOS-cMIPs and PFOS were confirmed to be a synergistic combination of electrostatic and hydrophobic interactions, as evidenced by FTIR analysis, zeta potential measurements, and pH studies. Additionally, Fe3O4@PFOS-cMIPs demonstrated excellent reusability, with stable performance across six adsorption-desorption cycles using a regeneration solution of acetone and NaCl. Furthermore, when coupled with LC-MS, Fe3O4@PFOS-cMIPs successfully detected trace levels of PFOS in complex environmental water samples. The method demonstrated high precision (RSD, 6.0 %), excellent recoveries (90.9 %-103.3 %), a low limit of detection (LOD, 0.06 ng L-1), and an enrichment factor of 299. Significance: This study presents a practical and efficient strategy for developing magnetic MIPs with enhanced molecular recognition. The enhanced specificity and adsorption capacity highlight the strong potential of these MIPs for the targeted extraction of PFOS from various contaminated water sources, offering significant contributions to environmental analysis and remediation.

合写作者：Hao Yi; Chen Xiaoyi; Wang Kaili; Wang Xingyan; Zhang Long; Jing Haiyan; Gao Ruixia*; Wang Sicen*

卷号：1349

页面范围：343799

是否译文：否

发表时间：2025-03-09