Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (08): 1956-1960.doi: 10.3866/PKU.WHXB20110721

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Preparation, Characterization and Catalytic Properties of Pd/Fe3O4-MCNT Magnetically Recyclable Catalysts

XU Ling1, SHEN Xiao-Xu1, XIAO Qiang1, ZHONG Yi-Jun1, YE Su-Fang2, YE Xiang-Rong3, ZHU Wei-Dong1   

  1. 1. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, Zhejiang Province, P. R. China;
    2. Jinhua College of Vocation and Technology, Jinhua 321007, Zhejiang Province, P. R. China;
    3. Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, USA
  • Received:2011-02-25 Revised:2011-04-19 Published:2011-07-19
  • Contact: XIAO Qiang, ZHONG Yi-Jun E-mail:xiaoq@zjnu.cn. yjzhong@zjnu.cn
  • Supported by:

    The project was supported by the Natural Science Foundation of Zhejiang Province, China (Y4100295), Key Science and Technology Program of Zhejiang Provincial Colleges, China (ZD2007002), and Young Seeding Talent Plan of Zhejiang Province, China (2009R404014).

Abstract:

A magnetic composite of multi-walled carbon nanotubes (MCNT) decorated with mono-dispersed Fe3O4 nanoparticles was prepared by a polyol method. The structure and composition of the resultant composite were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS) techniques. We found that the size of the Fe3O4 nanoparticles supported on the MCNT could be easily controlled by changing the mass ratio of the Fe3O4 precursor to the MCNT. By a subsequent polyol process, 3% (w) Pd was loaded onto a Fe3O4-MCNT composite to form Pd/Fe3O4-MCNT magnetic catalysts. The results from magnetic measurements indicated that the prepared composites before and after Pd loading possess superparamagnetic characteristics at room temperature. The prepared Pd/Fe3O4-MCNT catalysts were evaluated by the selective hydrogenation of cinnamaldehyde as a probe reaction and it showed high activity toward the conversion of cinnamaldehyde to hydrocinnamaldehyde. Under a magnetic field, the catalyst powder was easily separated from the liquid-phase reaction system. The catalyst did not show any significant degradation after four cycles indicating the good recyclability of the prepared composite catalyst.

Key words: Multi-walled carbon nanotubes, Magnetic composite catalyst, Polyol method, Cinnamaldehyde, Selective hydrogenation

MSC2000: 

  • O643.36