Carbon nanotube represent one of the best novel nanostructures which have different individual structures, morphologies and properties, and carbon nanotube was been described as a sheet of graphite rolled into a hollow cylinder and the length and diameter depended on the conditions of synthesis method. The rolling of graphite sheet form two important structure multi-walled carbon nanotube (MWNT) and single-walled carbon nanotube (SWNT) where the two structure have special properties and wide application like chemical, biological, electrical, medical, sensor, physical and other application. A wide variety of synthesis methods have been developed to produce the carbon nanotube in huge quantity, more purities and selective structure.