A continuous synthesis of carbon nanotubes by dc thermal plasma jet

In this contribution we present a dc thermal plasma jet route for the continuous synthesis of single- and multi- walled carbon nanotubes. Our findings show the as produced product to be dependent on the plasma atmosphere and catalyst. Multi walled carbon nanotubes can be synthesized without a catalyst. Single walled carbon nanotubes require the presence of a catalyst (Ni-Ce) and the addition of hydrogen to the buffer gas. Increasing the amount of hydrogen added to the reaction significantly improves the nanotube yield. PACS 81.07.De; 36.40.Gk; 63.50.+x; 68.37.Lp; 68.37.Hk