(Mg,Co)O Solid-Solution Precursors for the Large-Scale Synthesis of Carbon Nanotubes by Catalytic Chemical Vapor Deposition

Revathi Bacsa (1) , Christophe Laurent (1) , Alain Peigney (1) , Thibaud Vaugien (1) , Emmanuel Flahaut (1) , Wolfgang Bacsa (2) , Abel Rousset (1)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
2 Laboratoire Physique des Solides de Toulouse

Single- and double-walled carbon nanotubes were produced in high yield using the selective reduction of solid solutions of Mg1–xCoxO in a methane and hydrogen atmosphere at 1000°C. The solid solutions were prepared using combustion synthesis with urea as the fuel. The BET surface areas ranged from 10 to 65 m2/g depending on the fuel content. A single crystalline phase was obtained only for fuel-rich compositions. Increased fuel content increased the surface area by a factor of 6. However, very high fuel contents (>4 times the stoichiometric amount) caused a demixed solid solution. Surface-area measurements and Raman spectra showed that the quantity of nanotubes formed depended on the surface area and composition of the precursor oxide.

Mots clés: Single and double-walled carbon nanotubes; MgO; CoO; CCVD

Domaines: Matériaux

Revathi Bacsa, Christophe Laurent, Alain Peigney, Thibaud Vaugien, Emmanuel Flahaut, et al.. (Mg,Co)O Solid-Solution Precursors for the Large-Scale Synthesis of Carbon Nanotubes by Catalytic Chemical Vapor Deposition. Journal of the American Ceramic Society, 2002, 85 (11), pp.2666-2669. ⟨10.1111/j.1151-2916.2002.tb00513.x⟩. ⟨hal-03604353⟩