Effect of FeO_x loaded on CoO_x/Al_2O_3 catalyst for the formation of thin-walled carbon nanotubes

摘要

Effects of FeO_x loaded on CoO_x/Al_2O_3 catalyst on the yield and morphology of the produced carbon nanotubes were studied. The findings showed that the addition of a small amount of FeO_x on the CoO_x/Al_2O_3 catalyst provoked the formation of carbon nanotubes with a thin wall structure. The results also revealed that an increase in FeO_x content decreased the yield of carbon nanotubes. An optimized weight ratio of CoO_x to FeO_x was found to be 8:2 (w/w) whereby the catalyst of this composition grew carbon nanotubes with a thin wall structure and not of diminutive carbon yield.