J. Phys. IV France 12 (2002) Pr4-93
DOI: 10.1051/jp4:20020082

Growth of carbon nanotubes by fluidized bed catalytic chemical vapor deposition

D. Venegoni¹, P. Serp¹, R. Feurer², Y. Kihn³, C. Vahlas² and P. Kalck<sup>1

1</sup>  Laboratoire de Catalyse, Chimie Fine et Polymères, École Nationale Supérieure de Chimie de Toulouse, 118 route de Narbonne, 31077 Toulouse cedex, France
²  Centre Interuniversitaire de Recherche et d'Ingénierie des Matériaux, UMR CNRSIINPT/UPS, École Nationale Supérieure de Chimie de Toulouse, 118 route de Narbonne, 31077 Toulouse cedex, France
³  CEMES 8011 du CNRS, 2 rue Jeanne Marvig, 31055 Toulouse, France

Abstract
Multi-walled carbon nanotubes have been produced from H ₂/C ₂H ₄ mixtures on Fe/Si02 catalysts by a fluidized bed catalytic chemical vapor deposition process. Various parameters such as the duration of the experiments, the temperature, the H ₂/C ₂H ₄ ratio or the amount of metal on the silica support have been examined. The influence of these parameters on both the carbon deposited yield and the morphology of the deposit have been examined. MWNT are preferably produced in the 550-750 °C temperature range on a 2%Fe/SiO ₂ (w/w) catalyst in 30 min, with a H ₂/C ₂H ₄ ratio of 3. The multi-walled carbon nanotubes remain attached on the silica support.

© EDP Sciences 2002