Large-Scale Synthesis of High Purity Carbon Nanotubes by Novel Catalytic Route

Large-scale production of carbon nanotubes is achieved by using metal formates as catalyst precursors by chemical vapor deposition method. The calcium carbonate is used as catalyst support, it is chosen because of its nontoxic and easily soluble nature. The synthesis was carried out at 700 degrees C in quartz reactor for 15min. The obtained yield of carbon nanotubes was about 96times relative to the Ni/Co catalyst. The lengthy process of calcination and reduction for the preparation of catalysts is avoided in this method. This economical synthesis route is more efficient and environmentally friendly.