【作者】 刘悦； 李露； 刘仕伟； 于世涛；

【Author】 Yue Liu;Lu Li;Shiwei Liu;Shitao Yu;College of Chemical Engineering, Qingdao University of Science and Technology;

【机构】 青岛科技大学化工学院；

【摘要】 在水热条件下通过改变葡萄糖的加入量合成了碳层厚度可控的Ru/Fe₃O₄@C磁性催化剂。碳层包覆的Fe₃O₄纳米粒子表面增加了大量的功能性基团,能够很好的吸附与固定贵金属粒子。制备了不同Ru金属负载量的磁性催化剂。合成的碳包覆的核壳磁性催化剂分散性能较好,具有超顺磁特性。Ru/Fe₃O₄@C在催化α-蒎烯加氢制备顺式蒎烷反应时具有较高的催化活性与选择性,当反应结束时,利用外加磁场能够方便快速的实现催化剂的分离与回收,催化剂重复利用5次后,催化活性未见明显降低,具有较好的重复使用性能。更多还原

【Abstract】 The controlled carbon layer of Ru/Fe₃O₄@C was successfully synthesized by changing amounts of glucose under hydrothermal condition. Coating Fe₃O₄ nanoparticles with carbon layer can add functional groups on their surface, noble metal could be easily adsorbed. An efficient magnetic carbon nanospheres supported different loading of Ru nanoparticle catalyst was prepared. The obtained catalysts, consisting of core-shell structured microspheres with high uniformity, show a good superparamagnetic property. Ru/Fe₃O₄@C nanospheres were used as catalyst for hydrogenation of α-pinene to prepare cis-pinane with high selectivity and exhibited a highly catalytic activity. Furthermore, the results showed that the catalyst was completely recoverable with the simple application of an external magnetic field and recycled five times without distinct loss in activity.更多还原