稀土元素Sm修饰催化剂对碳纳米管生长的影响

The effects of samarium-doping catalyst on the growth of carbon nanotubes

稀土催化剂是一种稳定性好、选择性高、很活泼的催化剂,在石油的催化裂解方面得到了广泛的应用.以CVD方法生长碳纳米管经稀土元素Sm修饰过渡金属催化剂,进一步增强了催化剂的活性,有效降低了碳氢气的催化裂解温度,从而使合成温度降低到630℃以下,合成的碳纳米管维度也有所改善,这对于大量工业化生长优质碳纳米管具有一定的应用前景.

The growth of CNTS(carbon nanotubes) by catalytically cracking ethylene in the presence of the supported catalyst doped with rare earth samaria is reported. The addition of rare earth composition noticeably affects the morphology and the yield of CNTS.Comparative results to the CNTS synthesized with and without rare-earthe additions indicate that the addition of rare earth effectively decreases its formation temperature with the same or larger yield of CNTS and improves the morphology of CNTS,which is important for potential commercial applications.