The formation of carbon nanotubes (CNTs) occurs typically between 600 and 1000°C. Due to the low-temperature process, chemical vapor deposition (CVD) method is generally better for the production of the multiwall carbon nanotubes (MWCNTs)...
moreThe formation of carbon nanotubes (CNTs) occurs typically between 600 and 1000°C. Due to the low-temperature process, chemical vapor deposition (CVD) method is generally better for the production of the multiwall carbon nanotubes (MWCNTs) as compared to other synthesis methods. The transition metals used for CNT synthesis are Fe, Co, and Ni. The wet impregnation methods are used for binary catalyst preparation and the starting materials are ferric nitrate, cobalt nitrate, and nickel nitrate. The samples are prepared with 1, 3, and 5% catalyst weight percentage with a CaCO 3 substrate. Thermogravimetric and differential temperature analysis (TG-DTA) is
