A facile preparation of nanocrystalline Mo2C from graphite or carbon nanotubes

✍ Scribed by Zeheng Yang; Peijun Cai; Liang Shi; Yunle Gu; Luyang Chen; Yitai Qian

• Book ID: 104029391
• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 253 KB
• Volume: 179
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1016/j.jssc.2005.09.037

✦ Synopsis

Nanocrystalline Mo 2 C powders were successfully synthesized at 500 1C by reacting molybdenum chloride (MoCl 5 ) with C (graphite or carbon nanotube) in metallic sodium medium. X-ray powder diffractometer (XRD), transmission electron microscope (TEM), X-ray photoelectron spectroscope (XPS) and surface area analyzer (BET method) were used to characterize the samples. Experiments reveal that the carbon source used for the carbide synthesis has a great effect on the particle size and the surface area of the samples. When micro-sized graphite was used as C source the obtained nanocrystalline Mo 2 C powder consists of particles of 30100 nm, with a surface area of 2.311 m 2 /g. When carbon nanotubes were used as C source, the as-synthesized Mo 2 C sample is composed of particles of 2050 nm, with a surface area of 23.458 m 2 /g, which is an order of magnitude larger than that of the carbide prepared from the graphite.