Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Effect of Sulfur Concentration on the Morphology of Carbon Nanofibers Produced from a Bot | Nanoscale Res Lett 2008 3 242-248 DOI s11671-008-9143-3 NANO EXPRESS Effect of Sulfur Concentration on the Morphology of Carbon Nanofibers Produced from a Botanical Hydrocarbon Pradip Ghosh Tetsuo Soga Kaushik Ghosh Takashi Jimbo Ryoji Katoh Kenji Sumiyama Yoshinori Ando Received 11 March 2008 Accepted 23 June 2008 Published online 8 July 2008 to the authors 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. P. Ghosh H T. Soga T. Jimbo Department of Environmental Technology and Urban Planning Graduate School of Engineering Nagoya Institute of Technology Gokiso-cho Showa-ku Nagoya 466-8555 Japan e-mail pradipnit@ K. Ghosh Y. Ando Department of Material Science and Engineering Meijo University Tempaku-ku Nagoya 468-8502 Japan R. Katoh K. Sumiyama Department of Material Science and Engineering Graduate School of Engineering Nagoya Institute of Technology Gokiso-cho Showa-ku Nagoya 466-8555 Japan Keywords Carbon nanofiber Spray pyrolysis
