Universiti Teknologi Malaysia Institutional Repository

Acid purification of carbon nanotubes grown by CCVD for hydrogen storage

Goh, P. S. and Aziz, M. and Ismail, Ahmad Fauzi (2007) Acid purification of carbon nanotubes grown by CCVD for hydrogen storage. In: The 23rd Regional Conference On Solid State Science and Technology 2007, 27-29 November 2007, Hyatt Regency Hotel, Johor Bahru, Malaysia.

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Abstract

Purification of CNT through acid treatmnet is studied in order to obtain an optimal performance of CNT grown by CCVD for hydogen storage. The purification method consists of reflux treatment of HCl and HNO3 is applied in the study. The effect of reflux temperature and duration of reaction are studied and the effectiveness of the purification in the conditions mentioned above is compared. FESEM and BET surface area analysis, both before and after purification, to monitor and observe the changes in morphology and surface area due to purification respectively. Acid treatment is capable in removing the metal catalysts and amorphous carbon, thus resulting in tips opening. The opening tips which in turn results in the increase in CNT specific surface area is one of the essential factors that contribute to the enhancement of hydrogen storage capacities.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Acid purification, acid treatment, carbon nanotubes, hydrogen storage
Subjects:T Technology > T Technology (General)
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:5509
Deposited By: Norhani Jusoh
Deposited On:04 May 2008 04:32
Last Modified:01 Jun 2010 15:31

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