Buang, Nor Aziah and Abd. Majid, Zaiton and Sulaiman, Yusran and M. Sanip, Suhaila and Ismail, Ahmad Fauzi (2005) Effect of addition of Ni metal catalyst onto the Co and Fe supported catalysts for the formation of carbon nanotubes. In: 3rd International Conference on Materials for Advanced Technologies (ICMAT 2005) and 9th International Conference On Advanced Materials (ICAM 2005), 3-8 July 2005, Singapore.
Production of novel porous material is a major target in current material science research due to its wide applications. As carbon nanotube (CNTs) is a one dimensional hollow structure it is also one of the promising materials in applications ranging from electronics to hydrogen storage medium. Catalytic chemical vapor deposition (CCVD) is a method whereby CNTs can be produced in large amount. Thus, in this work, we have synthesized CNTs via pyrolysis of acetylene using various supported transition-metal catalysts in a fixed-bed reactor. Scanning electron microscope (SEM) and transmission electron microscope (TEM) were used to investigate the CNTs structure. The structures of nanotubes formed by acetylene pyrolysis were dependent on the catalysts used. It was found that alumina supported Ni/Fe catalyst inhibited the formation of CNTs growth while alumina supported Ni/Co catalyst gave high density of CNTs. However, nanotubes grown over alumina supported Ni/Fe catalyst were less dense due to the deactivation of the catalyst at the early stage of the pyrolysis process.
|Item Type:||Conference or Workshop Item (Paper)|
|Uncontrolled Keywords:||Carbon nanotubes, supported catalysts, SEM, TEM|
|Subjects:||T Technology > T Technology (General)|
|Divisions:||Chemical and Natural Resources Engineering (Formerly known)|
|Deposited By:||Norhani Jusoh|
|Deposited On:||22 Apr 2008 10:16|
|Last Modified:||01 Jun 2010 15:30|
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