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首页> 外文期刊>Materials Chemistry and Physics >Synthesis of Mo-Fe_3O_4@SiO_2@P4VP core-shell-shell structured magnetic microspheres for alkene epoxidation reactions
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Synthesis of Mo-Fe_3O_4@SiO_2@P4VP core-shell-shell structured magnetic microspheres for alkene epoxidation reactions

机译：Mo-Fe_3O_4 @ SiO_2 @ P4VP核-壳-壳结构磁性微球的合成用于烯烃环氧化反应

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摘要

Molybdenum complexes immobilized on core-shell-shell structured Fe_3O_4@SiO_2@poly(4-vinylpyridine) microspheres have been successfully fabricated by grafting [3-(methacryloyloxy)propyl]trimethoxysilane on Fe_3O_4@SiO_2 followed by seeded emulsion polymerization of 4-vinylpyridine monomers. The synthesized samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), field-emission scanning electron microscopy (FESEM), x-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectra (FT-IR) and magnetometer. Their catalytic property was investigated by epoxidation of alkenes, using environmentally friendly H_2O_2 and ethanol as oxidant and solvent, respectively. The results show that Mo-Fe_3O_4@SiO_2@P4VP catalyst possesses high conversion (99.0%) and selectivity (99.0%) in the epoxidation of ris-cyclooctene at 60 ℃ for 24 h, and the catalyst can be recovered using a magnet and still shows high conversion (95.0%) and selectivity (99.0%) after being recycled three times.
机译：通过在Fe_3O_4 @ SiO_2上接枝[3-（甲基丙烯酰氧基）丙基]三甲氧基硅烷，然后进行4-乙烯基吡啶单体的种子乳液聚合，已成功地制备了固定在核-壳-壳结构的Fe_3O_4 @ SiO_2 @聚（4-乙烯基吡啶）微球上的钼配合物。 。合成的样品通过X射线衍射（XRD），透射电子显微镜（TEM），场发射扫描电子显微镜（FESEM），X射线光电子能谱（XPS），傅立叶变换红外光谱（FT-IR）进行表征和磁力计。分别使用环境友好的H_2O_2和乙醇作为氧化剂和溶剂，通过烯烃的环氧化研究了它们的催化性能。结果表明，Mo-Fe_3O_4 @ SiO_2 @ P4VP催化剂在60℃下进行24h的环辛烯环氧化反应具有很高的转化率（99.0％）和选择性（99.0％），可以用磁铁和蒸馏器回收。循环使用三遍后显示出高转化率（95.0％）和选择性（99.0％）。

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  • 来源
    《Materials Chemistry and Physics 》 |2012年第3期| 985-990| 共6页
  • 作者

    Xiubing Huang; Wanchun Guo; Ge Wang; Mu Yang; Qian Wang; Xinxin Zhang; Yanhui Feng; Zhan Shi; Chunguang Li;

  • 作者单位

    School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China;

    School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China;

    School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China;

    School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China;

    School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China;

    School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China;

    School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China;

    State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China;

    State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, People's Republic of 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    magnetic materials; composite materials; multilayers; polymers;

    机译：磁性材料复合材料;多层聚合物;

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