Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (05): 569-572.doi: 10.3866/PKU.WHXB20050522

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A New Approach to Synthesize Nickel Nanoparticles

TAO Xiao-Jun; LI Zhi-Wei; CHEN Hong-Jie; ZHANG Ping-Yu; ZHANG Zhi-Jun; WU Zhi-Shen; DANG Hong-Xin   

  1. The Key Laboratory of Special Functional Materials, Henan University, Kaifeng    475001
  • Received:2004-09-29 Revised:2004-12-20 Published:2005-05-15
  • Contact: ZHANG Zhi-Jun

Abstract: Nickel nanoparticles were successfully synthesized by a replacement reaction of nickelous 2-ethylhexanoate with metal sodium in liquid paraffin under ultrasonic irradiation. The morphology, structure and thermal stability of the samples obtained were characterized with TEM, ED, XRD, XPS and TG. The TEM and ED results reveal that the produced nickel nanoparticles have single crystal structure and their size distribution is relatively narrow. XRD and XPS analyses display that the produced nickel nanoparticles possess the same hexagonal crystal structure as bulk nickel materials and there is a very small fraction of Ni(Ⅱ) on the surface of the Ni nanoparticles, respectively. In addition, the result of TG indicates that the as-synthesized samples have high thermostability.

Key words: Replacement reaction, Sodium, Ultrasonic irradiation, Nickel nanoparticles