Catalyst or production of multi-walled carbon nanotubes and method of producing multi-walled carbon nanotubes using the same

1. A method for producing multi-walled carbon nanotubes, comprising:

(a) preparing a catalyst for production of multi-walled carbon nanotubes comprising a support mixture of a first support and a second support mixed with the first support and a transition metal catalyst supported on the support mixture, wherein the second support is magnesium oxide (MgO) and the second support is added in an amount of 5-50 wt % based on 100 wt % of the catalyst for production of multi-walled carbon nanotubes; and

(b) reacting the catalyst for production of multi-walled carbon nanotubes with hydrocarbon gas and hydrogen gas at a temperature of 600 to 900° C. to form multi-walled carbon nanotubes,

wherein step (a) comprises:

preparing a mixture by dissolving a Mg precursor in a solvent, adding a boehmite to the solvent containing the dissolved Mg precursor, and mixing the boehmite with the solvent for 10-30 minutes;

preparing a support mixture by drying the prepared mixture at a temperature of 100 to 150° C. for 1-3 hours, and then heat-treating at a temperature of 450 to 550° C. for 1-5 hours;

dissolving a transition metal catalyst precursor in a solvent; and

mixing the solvent containing the dissolved transition metal catalyst precursor with the support mixture for 10-30 minutes.

2. The method of claim 1 , wherein the hydrocarbon gas and the hydrogen gas are supplied at a flow rate of 50-500 sccm for 5-60 minutes.