Tee, J.C. and Buang, Nor Aziah and M. Sanip, Suhaila and Ismail, Ahmad Fauzi (2004) Characterization on series of supported metal oxides catalysts for the synthesis of carbon nanotubes (CNTs). In: The XXI Regional Conference and Workshop on Solid State Science & Technology 2004, 12-13 Oktober 2004, Hyatt Regency Kinabalu, Sabah, Malaysia.
Catalytic properties of ferrum, cobalt and mixture of ferrum and cobalt supported on aluminium oxides (Al2O3) and zeolite Y have been investigated in the synthesis of carbon nanotubes (CNTs). The supported catalysts were prepared by impregnation method. The supports were impregnated acetate salt solutions of either Fe or Co or mixture of Fe and Co so as to get certain wt % of the metal on the supports. Acetylene is used as the source of carbon and nitrogen as the carrier gas. The pyrolysis of acetylene was carried out at 700 Â°C with reaction time 30 minutes. The effects of the types of support, quantity and types of catalyst as well as the calcination process have also been studied. The types of Fe/Co metal oxides formed on the supports and the effect of calcination were determined by X-ray diffraction technique (XRD) and energy dispersive X-ray analysis (EDAX). Results obtained showed that Fe / Co with different oxidation states were formed on Al2O3 and zeolite Y. Scanning electron microscope (SEM) and EDAX was used to follow the quality and nature of as-grown CNTs. It was observed that CNTs with different diameters or sizes were produced from various types of supported catalysts.
|Item Type:||Conference or Workshop Item (Paper)|
|Uncontrolled Keywords:||Calcination process, carbon nanotubes, metal oxides catalysts, zeolite|
|Subjects:||T Technology > T Technology (General)|
|Divisions:||Chemical and Natural Resources Engineering (Formerly known)|
|Deposited By:||Norhani Jusoh|
|Deposited On:||26 Aug 2008 10:50|
|Last Modified:||01 Jun 2010 15:38|
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