Articles
  • Synthesis and growth of multi-walled carbon nanotubes (MWNTs) by CCVD using Fe-supported zeolite templates
  • Wei Zhaoa, Hyun Sung Kimb, Hyung Tae Kimc, Jianghong Gongd and Ik Jin Kima,*
  • aInstitute for Processing and Application of Inorganic Materials (PAIM), Department of Materials Science and Engineering, Hanseo University, 360 Daegok-ri, Haemi-myun, Seosan city, Chungnam, 356-706 Korea bCenter for Nanomaterials/Korea Center for Artificial Photosynthesis (KCAP), Sogang Bldg., Sogang University, 1-3 Shinsudong, Mapo-gu, Seoul, 121-854, Korea cEngineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology(KICET), Icheon 467-84, Kyoung-gi do, Korea dDepartment of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
Abstract
Multi-walled carbon nanotubes (MWNTs) were synthesized by catalytic chemical vapor deposition (CCVD) using acetylene as the carbon source and Fe-supported zeolite (FAU) templates. The effect of the catalyst content and the reaction time on the synthesis of CNTs were investigated through transmission electron microscopy (TEM), thermogravimetic (TG) analysis, and Raman spectroscopy. A number of MWNTs synthesized for 1 h had inner and outer tube diameters in the range of 3.8-5.0 nm and 6.3-8.8 nm, respectively, which were smaller than those of conventional thick MWNTs. With increasing iron content in the zeolite, the carbon yield showed a monotonic increasing tendency, reaching 63.1% as the iron content was up to 0.12 mol%. With prolonged reaction times such as 30 minutes, 1 h, 2 h, and 3 h, the inner diameter of the CNTs remained constant while the outer diameter became larger and larger, with the carbon yield after the reaction of 3 h reaching 63.1%.

Keywords: Carbon nanotubes, Catalytic chemical vapor deposition, Zeolite, Template, Catalyst

This Article

  • 2011; 12(4): 392-397

    Published on Aug 31, 2011

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