核-壳结构磁性纳米颗粒负载离子液体的合成方法及应用

发布时间：2018-02-05 19:26

本文关键词： 离子液体核-壳结构磁性纳米颗粒催化剂载体分离和回收　出处：《化学通报》2016年12期 　论文类型：期刊论文

【摘要】：离子液体具有良好的溶解能力、稳定性、结构可调性、无明显的蒸汽压等优点,使其可以作为良好的有机反应介质和催化剂,但由于其价格昂贵且不易从反应体系中分离,应用受到限制。以超顺磁性纳米颗粒作为催化剂载体,利用其所提供的磁学特性,可通过外磁场对催化剂进行简单有效的分离。不过,超顺磁性纳米颗粒具有的高比表面能以及粒子间的偶极距作用,使其容易团聚,不能稳定分散于反应体系。若在磁性纳米颗粒表面包裹一层有机物或无机物形成核-壳结构复合材料,就既可以阻止其团聚又可以对其进行表面功能化。因此,将离子液体固载到核-壳结构磁性纳米颗粒表面,制备可回收并循环使用的多相催化剂的工作受到广泛关注。本文综述了近十年来核-壳结构磁性纳米颗粒负载离子液体催化剂的制备方法及其在有机合成方面的应用,并对其未来的应用前景进行了展望。
[Abstract]:Ionic liquids have the advantages of good solubility, stability, adjustable structure, no obvious vapor pressure and so on, so they can be used as a good organic reaction medium and catalyst. However, its application is limited because of its high price and difficult to be separated from the reaction system. The superparamagnetic nanoparticles are used as the catalyst carrier to utilize the magnetic properties provided by the superparamagnetic nanoparticles. The catalyst can be separated simply and effectively by external magnetic field. However, the superparamagnetic nanoparticles have high specific surface energy and dipole interaction between particles, which make them easy to agglomerate. If core-shell composite is formed by encapsulating a layer of organic or inorganic material on the surface of magnetic nanoparticles, it can not only prevent the agglomeration but also functionalize the surface. The ionic liquid was immobilized on the surface of the core-shell structure magnetic nanoparticles. The preparation of recoverable and recycled heterogeneous catalysts has attracted wide attention. In this paper, the preparation methods of core-shell magnetic nanoparticles supported ionic liquid catalysts and their applications in organic synthesis are reviewed. Application. The prospect of its application in the future is also prospected.
【作者单位】：郑州大学化工与能源学院多相催化与工程科学中心;
【基金】：河南省教育厅科学技术研究重点项目(14A530003) 河南省高等学校重点科研项目(15B530004)资助
【分类号】：O645.1;O643.36

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