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Issue 8, 2014
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Synthesis of carbon nanotubes by microwave heating: Influence of diameter of catalytic Ni nanoparticles on diameter of CNTs

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Abstract

We rapidly synthesized multi walled carbon nanotubes (MWCNTs) by calcination of granulated polystyrene with nickel nanoparticles having different average diameter (DNi = 10, 20, 50 or 90 nm) under nitrogen gas at a certain temperature and time (700 °C, 15 min or 800 °C, 10 min), using a domestic microwave oven in order to systematically investigate the influence of the diameter of nickel nanoparticles on the diameter of MWCNTs. The MWCNTs synthesized here were characterized by a transmission electron microscope, a Raman spectrophotometer and a wide angle X-ray diffractometer. We found that for the calcination condition of (800 °C, 10 min), a relationship between the outer diameter of the resulted carbon nanotubes (DCNT) and the diameter of catalytic nickel nanoparticles (DNi) can be described as a linear function, DCNT = 1.01DNi + 14.79 nm with the correlation coefficient R = 0.99, and that for the calcination condition of 700 °C, 15 min, DCNT = 1.12DNi + 7.80 nm with R = 0.95. Thus, we revealed that when the diameter of the catalytic nickel nanoparticles (DNi) increases by 1 nm, the outer diameter of the obtained MWCNTs (DCNT) increases by about 1 nm.

Graphical abstract: Synthesis of carbon nanotubes by microwave heating: Influence of diameter of catalytic Ni nanoparticles on diameter of CNTs

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Supplementary files

Article information


Submitted
20 Aug 2013
Accepted
08 Nov 2013
First published
16 Jan 2014

J. Mater. Chem. A, 2014,2, 2773-2780
Article type
Paper

Synthesis of carbon nanotubes by microwave heating: Influence of diameter of catalytic Ni nanoparticles on diameter of CNTs

K. Ohta, T. Nishizawa, T. Nishiguchi, R. Shimizu, Y. Hattori, S. Inoue, M. Katayama, K. Mizu-uchi and T. Kono, J. Mater. Chem. A, 2014, 2, 2773
DOI: 10.1039/C3TA13297H

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