| 摘要 |
PURPOSE: Provided are a metal catalyst used for the fabrication of a carbon nano tube or a carbon nano fiber, and a method for fabricating the metal catalyst which is made of nickel, cobalt, iron or copper, or a mixture thereof. CONSTITUTION: The metal catalyst fabrication method comprises (a) adjusting pH of a metal sulfate aqueous solution containing at least one metal selected from a group consisting of nickel, cobalt, iron, and copper using ammonia solution, thereby settling metal hydroxides, and drying the settled metal hydroxides, (b) calcining the metal hydroxides to form metal oxides at a temperature in a range of 800-1000°C, and (c) reducing the metal oxides at hydrogen ambience.
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