| 摘要 |
A method for producing carbon nanostructures using a chemical vapor deposition process. A carbon source and a mixture catalyst are used wherein the mixture catalyst includes at least one element, from a group A including Fe, Co and Ni, and at least one supporting element, from a group B including lanthanides. The lanthanide elements can be used to lower the melting point of the catalyst by forming alloys so that the carbon nanostructures can be grown at lower temperatures. Further, the lanthanide elements also enhance catalyst activity of Ni, Co or Fe by changing the catalyst surface electronic properties. Also, the lanthanide elements also scavenger excess carbon so that carbon nanostructures can be grown without contamination.
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