Catalyst for preparing carbon nanotube comprising multi-component support materials containing amorphous silicon particles and the bulk scale preparation of carbon nanotube using the same

A catalyst composition containing amorphous silicon support material for preparing carbon nanotube represented by following formula

• [FeaCObNic]p[MgxAlySiz]q
• wherein
• [Fe, Co, Ni] represents catalytic metal of iron, cobalt, nickel and its oxide or its derivative;
• [Mg, Al, Si] represents inactive support material of magnesium, aluminum, amorphous silicon and its oxide or its derivative;
• p and q represent mole fraction of catalytic metal and inactive support material, respectively;
• p+q=1, 0.03≦p≦0.9, 0.1≦q≦0.97,
• a, b and c represent mole fraction of Fe, Co and Ni, respectively;
• a+b+c=1, 0.1≦a≦1.0, 0≦b≦0.9, 0≦c≦0.9,
• x, y and z represent mole fraction of Mg, Al and amorphous Si, respectively;
• x+y+z=1, 0.05≦x≦0.95, 0.05≦y≦0.95, 0.005≦z≦0.6.