Mn-MCM-41 was synthesized in various (Si/Mn = 25, 50, 75 and 100) ratios, using manganese acetate as source for manganese by hydrothermal method and was calcined at 550 degrees C for 6 hrs. The physico-chemical characterizations of Mn-MCM-41 showed the formation of hexagonally arranged mesopores with high surface area. The calcined Mn-MCM-41 was used as catalytic templates for the growth of large amount of carbon nanotubes. Acetylene was used as carbon source and nitrogen as carrier gas for the formation of carbon nanotubes by chemical vapor deposition method. The effect of temperature was carried out 750, 800, 850 and 900 degrees C, at a flow rate of 40 ml/min of acetylene precursor. The SEM, TEM and XRD confirmed the formation of large amount of carbon nanotubes.
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