Method for mass synthesis of carbon nanotubes and carbon nanotubes synthesized thereby

A method for synthesis of carbon nanotubes (CNT), comprising:

• a first step of supplying a CNT growth material including a carbon precursor;
• a second step of disposing a pair of metal wires in a solution in which a metal salt is mixed, and applying electric power to the metal wires to generate plasma, thereby synthesizing a catalyst while reducing the metal salt into a metal atom;
• and
• a third step of thermally treating the CNT growth material and the catalyst to dissolve the carbon precursor in the catalyst, thereby continuously synthesizing carbon nanotubes while growing the carbon nanotubes,
• wherein the catalyst in the second step comprises an alloy catalyst including an alloy of two or more selected from cobalt (Co), nickel (Ni), and iron (Fe), and
• wherein the metal wires and the metal salt are composed of different metals to form the alloy catalyst through plasma generation, and the alloy included in the alloy catalyst is formed of the different metals composing the metal wires and the metal salt respectively.