| 초록 |
CNTs were prepared in a CCVD apparatus using Fe-MCM-41 as a catalyst/nano-template. Yields of the carbonaceous materials formed were measured and characterized using various instruments. With C2H2 as a carbon source, a set of 750℃, 200 sccm of Ar : H2 : C2H2 ( 14 : 5 : 1 ) mixture, and 1 h reaction time was established to be the optimum synthesis condition. Oxidation at 470℃ followed by acid treatment using HF produced high quality MWNTs. Also, it was possible to observe the growth of SWNTs by combination of Fe/Co catalysts : SWNTs were grown only in the case of direct inclusion of Fe to MCM-41 support with post-inclusion of Co. |
