首页> 外文期刊>Journal of Hazardous Materials >Methyl parathion imprinted polymer nanoshell coated on the magnetic nanocore for selective recognition and fast adsorption and separation in soils
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Methyl parathion imprinted polymer nanoshell coated on the magnetic nanocore for selective recognition and fast adsorption and separation in soils

机译:甲基对硫磷印迹聚合物纳米壳,包覆在磁性纳米核上,可选择性识别并在土壤中快速吸附和分离

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摘要

Core-shell magnetic methyl parathion (MP) imprinted polymers (Fe_3O_4@MPIPs) were fabricated by a layer-by-layer self-assembly process. In order to take full advantage of the synergistic effect of hydrogen-binding interactions and π-π accumulation between host and guest for molecular recognition, methacrylic acid and 4-vinyl pyridine were chosen as co-functional monomers and their optimal proportion were investigated. The core-shell and crystalline structure, morphology and magnetic properties of Fe_3O_4@MPIPs were characterized. The MP-imprinted nanoshell was almost uniform and about 100 nm thick. Binding experiments demonstrated that Fe_3O_4@MPIPs possessed excellent binding properties, including high adsorption capacity and specific recognition, as well as fast adsorption kinetics and a fast phase separation rate. The equilibration adsorption capacity reached up to 9.1 mg/g, which was 12 times higher than that of magnetic non-imprinted polymers, while adsorption reached equilibrium within 5 min at a concentration of 0.2 mmol/L. Furthermore, Fe_3O_4@MPIPs successfully provided selective separation and removal of MP in soils with a recovery and detection limit of 81.1 -87.0% and 5.2 ng/g, respectively.
机译:通过逐层自组装工艺制备核壳型甲基对硫磷(MP)印迹聚合物(Fe_3O_4 @ MPIPs)。为了充分利用氢键相互作用和主体与客体之间π-π积累的协同效应进行分子识别,选择甲基丙烯酸和4-乙烯基吡啶作为共官能单体,并研究了它们的最佳比例。表征了Fe_3O_4 @ MPIPs的核壳结构,晶体结构,形貌和磁性。 MP印迹的纳米壳几乎是均匀的,约100 nm厚。结合实验表明,Fe_3O_4 @ MPIPs具有优良的结合性能,包括高吸附能力和特异识别能力,以及快速的吸附动力学和快速的相分离速率。平衡吸附容量达到9.1 mg / g,是磁性非印迹聚合物的12倍,而在0.2 mmol / L的浓度下5分钟内吸附达到平衡。此外,Fe_3O_4 @ MPIPs成功地提供了土壤中MP的选择性分离和去除,回收率和检出限分别为81.1 -87.0%和5.2 ng / g。

著录项

  • 来源
    《Journal of Hazardous Materials》 |2014年第15期|34-41|共8页
  • 作者单位

    School of Chemistry and Environment, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Guangzhou, China;

    School of Chemistry and Environment, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Guangzhou, China;

    School of Chemistry and Environment, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Guangzhou, China;

    School of Chemistry and Environment, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Guangzhou, China;

    The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, College of Environmental Science and Engineering, South China University of Technology, Guangzhou, China;

    School of Chemistry and Environment, Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, South China Normal University, Guangzhou, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Methyl parathion; Molecularly imprinted polymers; Superparamagnetic; Layer-by-layer self-assembly; Soil samples;

    机译:甲基对硫磷;分子印迹聚合物;超顺磁性逐层自组装;土壤样本;
  • 入库时间 2022-08-17 13:22:33

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