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Synthesis of transition metal carbide nanoparticles through melamine and metal oxides

✍ Scribed by M. Lei; H.Z. Zhao; H. Yang; B. Song; W.H. Tang

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
970 KB
Volume
28
Category
Article
ISSN
0955-2219

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✦ Synopsis

By a facile reaction route, we synthesized five technologically important transition metal carbide nanoparticles including cubic NbC, TaC, VC, hexagonal WC and MoC at relatively low temperatures. Here, in this rapid reaction process, we choose an organic reagent melamine and transition metal oxides as reaction precursors. The experimental results indicate that melamine is a highly efficient carburization reagent, and the metal oxides are completely converted into the corresponding carbides at relatively low temperatures. It is found that NbC, TaC, VC and WC are composed of fine nanoparticles having average size of 7, 13, 5 and 18 nm with a fairly narrow size distribution, respectively. The potential reaction mechanism between melamine and transition metal oxides and some new characteristics involved in this route are presented and discussed.

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✍ Weitang Yao; Philippe Makowski; Cristina Giordano; FrΓ©dΓ©ric Goettmann πŸ“‚ Article πŸ“… 2009 πŸ› John Wiley and Sons 🌐 English βš– 273 KB

## Abstract The use of urea as either a carbon or a nitrogen source enabled the synthesis of various early‐transition‐metal nitride and carbide nanoparticles (TiN, NbN, Mo~2~N, W~2~N, NbC~__x__~N~1βˆ’__x__~, Mo~2~C and WC). The ability of these particles to promote alkylation reactions with alcohols