| 초록 |
In CNT synthesis using deep-injection FCCVD (DI-FCCVD), effects of changes in catalyst precursor type and sulfur concentration were investigated. Four catalyst precursors (ferrocene, acetyl-ferrocene, ferrocene-carboxaldehyde, methyl-ferrocene) were selected and their thermal decomposition behavior was analyzed. The position of the first peak in the dTG was increased in the order of methyl-ferrocene, ferrocene, ferrocene-carboxaldehyde and acetyl-ferrocene. Simulation result of the bond dissociation energy (BDE) suggests that stepwise decomposition due to presence of functional groups has a greater effect on phase change at elevated temperature than the high BDE. CNT synthesis using acetyl-ferrocene and ferrocene-carboxaldehyde show less sulfur requirement in production and less sulfur effect in purity and smaller catalyst size than the case of ferrocene and methyl-ferrocene. This study can show the potential for a new research direction to researchers related to carbon nanotube synthesis, and can suggest a new perspective on the mass production of carbon nanotubes with desired properties by controlling the catalyst size. |
