title: Effect of sulfur concentration on the morphology of carbon nanofibers produced from a botanical hydrocarbon.
abstract: Carbon nanofibers (CNF) with diameters of 20-130 nm with different morphologies were obtained from a botanical hydrocarbon: Turpentine oil, using ferrocene as catalyst source and sulfur as a promoter by simple spray pyrolysis method at 1,000 °C. The influence of sulfur concentration on the morphology of the carbon nanofibers was investigated. SEM, TEM, Raman, TGA/DTA, and BET surface area were employed to characterize the as-prepared samples. TEM analysis confirms that as-prepared CNFs have a very sharp tip, bamboo shape, open end, hemispherical cap, pipe like morphology, and metal particle trapped inside the wide hollow core. It is observed that sulfur plays an important role to promote or inhibit the CNF growth. Addition of sulfur to the solution of ferrocene and turpentine oil mixture was found to be very effective in promoting the growth of CNF. Without addition of sulfur, carbonaceous product was very less and mainly soot was formed. At high concentration of sulfur inhibit the growth of CNFs. Hence the yield of CNFs was optimized for a given sulfur concentration.
authors.affiliation: Department of Environmental Technology and Urban Planning, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, 466-8555, Japan. pradipnit@yahoo.co.in.
authors.forename: Pradip
authors.initials: P
authors.lastname: Ghosh
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Soga
authors.forename: Kaushik
authors.initials: K
authors.lastname: Ghosh
authors.forename: Takashi
authors.initials: T
authors.lastname: Jimbo
authors.forename: Ryoji
authors.initials: R
authors.lastname: Katoh
authors.forename: Kenji
authors.initials: K
authors.lastname: Sumiyama
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Ando