METHOD FOR MANUFACTURING CATALYTIC CARBON NANOFIBER BY DECOMPOSITION OF HYDROCARBON AND CATALYST

摘要

PROBLEM TO BE SOLVED: To efficiently produce carbon nanofibers. SOLUTION: Diamond oxide is immersed in an aqueous solution of nickel nitrate, dried by vaporization, then calcined in an air flow to convert nickel salts into nickel oxide and then reduced in a hydrogen gas flow to obtain a diamond catalyst carried by nickel. When a mixed gas of methane at 15 ml/ minute and argon at 20 ml/minute at 600 deg.C is supplied while using the above catalyst, the reaction of (1) CH4 +Ni/Dia→C-Ni+2H2 proceeds to precipitate carbon nanofibers having about 20 nm diameter on the surface of the diamond.