CCVD synthesis of carbon nanotubes with W/Co–MgO catalysts

Perine Landois (1) , Alain Peigney (1) , Christophe Laurent (1) , Loic Frin (1) , Lucien Datas (1) , Emmanuel Flahaut (1)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

Carbon nanotubes (CNT) were synthesized from a H2–CH4 mixture with W/Co–MgO catalyst by a catalytic chemical vapour deposition (CCVD) method. Different W/Co ratios were investigated. From transmission electron microscopy observations, we observed that both the number of walls and the diameter of CNT increased with the proportion of tungsten. A promoter effect was observed as long as the proportion of tungsten was kept low and CNT with a number of walls ranging from 2 to 5 were obtained. With a higher proportion of tungsten, multi-walled carbon nanotubes (MWNT) up to 10 walls were synthesised, together with additional undesirable carbon nanofibres.

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Matériaux

Perine Landois, Alain Peigney, Christophe Laurent, Loic Frin, Lucien Datas, et al.. CCVD synthesis of carbon nanotubes with W/Co–MgO catalysts. Carbon, 2008, 47, pp.789-794. ⟨hal-01339348⟩