Wang Minwei Li Fengyi (Department of Chemical Engineering, Nanchang University, Nanchang 330029, China Institute of Applied Chemistry, Nanchang University, Nanchang 330047, China)
<正> A series of lanthanum containing Ni-base catalysts were prepared by citric acid complex method. Carbon nanotubes (CNT) were synthesized by catalytic decomposing CH4 over these catalysts and characterized by XRD,TEM and TGA. It is found that the addition of lanthanum can not increase the yield of carbon nanotube, but can make the diameter of carbon nanotube thinner and even. The more the lanthanum addsr, the thinner the diameter of CNTs becomes. With the CNTs prepared on Ni-Mg catalyst, the CNTs prepared on Ni-La-Mg catalyst has better crystallinity and thermal stability.
carbon nanotubes(CNTs); lanthanum; nickel; CH4;rare earths
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