Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (09): 1060-1064. Previous Articles     Next Articles

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Fe3O4@C/Pt复合纳米粒子的原位合成及其催化性质的研究

郭清华,韩三阳,姚建林*,顾仁敖   

  1. (苏州大学材料与化学化工学部 苏州 215123)
  • 收稿日期:2010-08-18 修回日期:2010-12-07 出版日期:2011-05-14 发布日期:2011-01-14
  • 通讯作者: 姚建林 E-mail:jlyao@suda.edu.cn
  • 基金资助:

    铁氧化物/金属核壳结构的表面增强拉曼光谱研究及其应用

In-situ Fabrication of Fe3O4@C/Pt Nanocomposite and Investigation of Its Catalytic Activity

GUO Qing-Hua, HAN San-Yang, YAO Jian-Lin, GU Ren-Ao   

  1. (College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123)
  • Received:2010-08-18 Revised:2010-12-07 Online:2011-05-14 Published:2011-01-14
  • Contact: Jianlin Yao E-mail:jlyao@suda.edu.cn

Magnetic Fe3O4 and Fe3O4@C core-shell nanostructures were prepared by the hydrothermal method and the Pt nanoparticles was in situ attached on Fe3O4@C to form Fe3O4@C/Pt nanocomposite. The TEM, SEM, FTIR and Raman spectroscopy were employed to characterize the surface morphology and composition. The catalytic activities of pure Pt nanoparticles (2 nm) and Fe3O4@C/Pt on the reaction of the transformation of 4-nitrophenol to 4-aminophenol in the presence of NaBH4 were investigated. The possibility of recycling on the catalyst was explored by applying an external magnetic field. The results revealed that Fe3O4@C/Pt exhibited higher catalytic efficiency than that of pure Pt nanoparticles. It was mainly due to the synergetic effect that occurred at the interface of metals and Fe3O4@C support. The charge transfer from magnetic core to the Pt caused the increase of electron density on Pt and thus improved the reducibility of Fe3O4@C/Pt. The nanocomposite catalyst was recyclable for about 20 times.

Key words: Fe3O4 magnetic nanoparticles, platinum, core-shell structures, catalysis, recycling