標題: Syntheses of nano-sized cubic phase early transition metal carbides from metal chlorides and n-butyllithiurn
作者: Chang, YH
Chin, CW
Chen, YC
Wu, CC
Tsai, CP
Wang, JL
Chiu, HT
應用化學系
Department of Applied Chemistry
公開日期: 1-八月-2002
摘要: Nano-sized early transition metal carbides, including TiC, ZrC, HfC, V4C3, NbC and TaC, were synthesized from colloidal precursors generated by reducing the metal chlorides, TiCl4, ZrCl4, HfCl4, VCl3, NbCl5, and TaCl5, respectively, with n-C4H9Li in hexane. The colloids were formed from the reduction of the metal centers, which then nucleated into nano-scaled metal clusters. The major byproducts were LiCl, C4H10, and C4H8, indicating that the butyl groups probably underwent beta-hydrogen elimination and reductive elimination. This suggests that C-C bond activation of the butyl groups was in operation, leaving residual carbon atoms in the metal colloids. The colloids were further heated at 873-1273 K to crystallize into cubic phase TIC, ZrC, HfC, V4C3, NbC and TaC nanoparticles.
URI: http://dx.doi.org/10.1039/b203927c
http://hdl.handle.net/11536/28628
ISSN: 0959-9428
DOI: 10.1039/b203927c
期刊: JOURNAL OF MATERIALS CHEMISTRY
Volume: 12
Issue: 8
起始頁: 2189
結束頁: 2191
顯示於類別:期刊論文


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