一种在溶液中合成碳化镍（Ni3C）纳米颗粒的新方法。

A new method to synthesize nickel carbide (Ni3C) nanoparticles in solution.

作者信息

Leng Yonghua, Shao Huaiyu, Wang Yuntao, Suzuki Masaaki, Li Xingguo

机构信息

The State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, PR China.

出版信息

J Nanosci Nanotechnol. 2006 Jan;6(1):221-6.

PMID:16573099

Abstract

Pure nickel carbide (Ni3C) nanoparticles with particle diameters of 40 nm have been prepared by thermal decomposition of nickel formate in the presence of oleic acid and oleyl amine. The coexistence of active nickel and active carbon plays an important role in the formation of metastable Ni3C. Ni3C powder decomposes at 770 K in an N2 atmosphere to yield nickel and carbon. While in an H2 atmosphere, Ni3C powder is converted into Ni at 627 K. In addition, Ni3C nanoparticles exhibit superparamagnetism and are easier to magnetize at room temperature due to their good crystallinity and few defects.

摘要

通过在油酸和油胺存在下热分解甲酸镍制备了粒径为40 nm的纯碳化镍（Ni3C）纳米颗粒。活性镍和活性碳的共存对亚稳Ni3C的形成起着重要作用。Ni3C粉末在N2气氛中于770 K分解生成镍和碳。而在H2气氛中，Ni3C粉末在627 K时转化为镍。此外，Ni3C纳米颗粒表现出超顺磁性，由于其良好的结晶性和较少的缺陷，在室温下更容易被磁化。