MASSIVE SYNTHESIS METHOD OF SINGLE-WALLED CARBON NANOTUBES BY VAPOR PHASE GROWTH, WHICH COMPRISES SINTERING CATALYTIC METAL PARTICLES SUPPORTED ON POWDER, AND FLOWING C-SOURCE GAS AND H2 GAS INTO CATALYTIC METAL PARTICLES SUPPORTED ON POWDER

摘要

PURPOSE: Provided is a massive synthesis method of high purity single-walled carbon nanotubes by sintering catalytic metal particles supported on powder, and flowing C-source gas and H2 gas into catalytic metal particles supported on powder. CONSTITUTION: The massive synthesis method of single-walled carbon nanotubes(15-50nm size) by vapor phase growth comprises the steps of: (i) supporting catalytic metal particles comprising Fe, Co, Ni, Mo or alloy thereof on nano-sized pores of powder comprising MgO, Al2O3, zeolite or silica; (ii) sintering catalytic metal-supported powder at 700-900deg.C for 6-12hrs in air atmosphere; (iii) putting catalytic metal-supported powder into a quartz(or graphite) boat in the furnace; (iv) keeping the temperature of the furnace at 700-1100deg.C; (v) flowing Ar, H2 and C-source gas comprising C2H2, CH3, C2H4 and CO into sintered catalytic metal-supported powder. The catalytic metal particles(1-3nm size) are supported on powder by the following steps of: (i) preparing catalytic metal particles-contained solution by dissolving catalytic metals such as Fe(NO3)39H2O, CoSO4xH2O, NiSO46H2O in water; (ii) mixing the solution with support powder, wherein the mole ratio of Fe, Ni or Co : Mo : MgO is 0.7-1 : 0.1-0.3 :10-13 in case that the resultant mixed solution contains Fe, Ni or Co, Mo and MgO, the mole ratio of Fe : Ni : Mo : MgO is 0.7-1 : 0.1-0.3 : 0.1-0.3 : 10-13 in case that the mixed solution contains Fe or Ni, Mo and MgO, and the mole ratio of Fe : Co : Mo : MgO is 0.7-1 : 0.1-0.3 : 0.1-0.3 : 10-13 in case that the mixed solution contains Fe or Co, Mo and MgO; (iii) drying the mixed solution at 150deg.C for 15hrs in a vacuum oven to remove water contained in the mixed solution; and (iv) grinding catalytic metal particles-contained powder.