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Journal of Nanomaterials
Volume 2013 (2013), Article ID 392126, 9 pages
http://dx.doi.org/10.1155/2013/392126
Research Article

Effects of Increasing Electrodes on CNTs Yield Synthesized by Using Arc-Discharge Technique

1Department of Production Engineering and Printing Technology, Akhbar Elyom Academy, Giza 12566, Egypt
2Department of Mechanical Design and Production Engineering, Cairo University, Giza 12566, Egypt

Received 14 January 2013; Revised 25 April 2013; Accepted 7 May 2013

Academic Editor: Nadya Mason

Copyright © 2013 Samy Yousef et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A new design of fully automatic system was built up to produce multiwalled carbon nanotube (MWCNT) using arc discharge technique in deionized water and extra pure graphite multiple electrodes (99.9% pure). The goal of the experimental research is to determine the yield of CNT in two different cases: (a) single plasma electrodes and (b) multiplasma electrodes, particularly 10 electrodes. The experiments were performed at constant parameters (75 A, 238 V). The obtained CNT was examined by scanning electron microscope (SEM), transmission electron microscope (HRTEM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). The results showed that the produced CNT is of type MWCNT, with a diameter of 5 nm, when using multiplasma electrodes and 13 nm when using single plasma electrodes. The yield of MWCNT was found to be 320% higher in case of comparing multielectrodes to that of single plasma electrodes. Under the experimental test conditions, a yield of 0.6 g/hr soot containing 40% by mass nanotube was obtained in case of single plasma electrodes and above 60% in case of multiplasma electrodes.