Nitric acid treated multi-walled carbon nanotubes optimized by Taguchi method

Shahidah Arina, Shamsuddin and Mohd Nazree, Derman and Uda, Hashim and Muhammad Fayyaz, Kashif and Tijjani, Adam and Nur Hamidah, Abdul Halim and Muhammad Faheem, Mohd Tahir (2016) Nitric acid treated multi-walled carbon nanotubes optimized by Taguchi method. AIP Conference Proceedings, 1756. pp. 1-7. ISSN 1551-7616

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Abstract

Electron transfer rate (ETR) of CNTs can be enhanced by increasing the amounts of COOH groups to their wall and opened tips. With the aim to achieve the highest production amount of COOH, Taguchi robust design has been used for the first time to optimize the surface modification of MWCNTs by nitric acid oxidation. Three main oxidation parameters which are concentration of acid, treatment temperature and treatment time have been selected as the control factors that will be optimized. The amounts of COOH produced are measured by using FTIR spectroscopy through the absorbance intensity. From the analysis, we found that acid concentration and treatment time had the most important influence on the production of COOH. Meanwhile, the treatment temperature will only give intermediate effect. The optimum amount of COOH can be achieved with the treatment by 8.0 M concentration of nitric acid at 120 °C for 2 hour.

Item Type: Article
Uncontrolled Keywords: Electron transfer rate (ETR), Nitric Acid, carbon nanotubes (CNTs), unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, research, Universiti Malaysia Sarawak
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Academic Faculties, Institutes and Centres > Faculty of Engineering
Depositing User: Ibrahim
Date Deposited: 17 Oct 2016 05:55
Last Modified: 17 Feb 2017 01:32
URI: http://ir.unimas.my/id/eprint/13956

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