Citation: XU Ling, SHEN Xiao-Xu, XIAO Qiang, ZHONG Yi-Jun, YE Su-Fang, YE Xiang-Rong, ZHU Wei-Dong. Preparation, Characterization and Catalytic Properties of Pd/Fe₃O₄-MCNT Magnetically Recyclable Catalysts[J]. Acta Physico-Chimica Sinica, ;2011, 27(08): 1956-1960. doi: 10.3866/PKU.WHXB20110721 shu

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

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 Date: 25 February 2011
Available Online: 26 May 2011
Fund Project: 浙江省自然科学基金 (Y4100295) (Y4100295) 浙江省高校重大科技攻关项目(ZD2007002) (ZD2007002)浙江省新苗人才计划项目(2009R404014) 资助 (2009R404014)

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 od recyclability of the prepared composite catalyst.
- Multi-walled carbon nanotubes,
- Magnetic composite catalyst,
- Polyol method,
- Cinnamaldehyde,
- Selective hydrogenation
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Preparation, Characterization and Catalytic Properties of Pd/Fe₃O₄-MCNT Magnetically Recyclable Catalysts