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Open Access Nano Express

Effect of Sulfur Concentration on the Morphology of Carbon Nanofibers Produced from a Botanical Hydrocarbon

Pradip Ghosh1*, Tetsuo Soga1, Kaushik Ghosh2, Takashi Jimbo1, Ryoji Katoh3, Kenji Sumiyama3 and Yoshinori Ando2

Author Affiliations

1 Department of Environmental Technology and Urban Planning, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, 466-8555, Japan

2 Department of Material Science and Engineering, Meijo University, Tempaku-ku, Nagoya, 468-8502, Japan

3 Department of Material Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, 466-8555, Japan

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Nanoscale Research Letters 2008, 3:242-248  doi:10.1007/s11671-008-9143-3

Published: 8 July 2008

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.

Keywords:
Carbon nanofiber; Spray pyrolysis method; Botanical hydrocarbon; Scanning electron microscopy; Transmission electron microscopy