Synthesis of carbon nanotubes using Co/CaCO3 as a catalyst

In this study, the catalysts 12% (m/m) Co/Al2O3 and x% (m/m) Co/CaCO3 (x=2.5%, 5%, and 12%) were synthesized by the combustion method and tested in the synthesis of carbon nanotubes (CNTs) by the Catalytic Vapor Decomposition (CVD) method. Methane and acetylene were the carbon sources used, and the reaction temperatures were 700 °C for acetylene and 900 °C for methane. The results of Raman spectroscopy and scanning electron microscopy analyses revealed that the CNTs produced with the cobalt...