Radial growth of vertically aligned carbon nanotube arrays from ethylene on ceramic spheres

Qiang Zhang, Jia Qi Huang, Meng Qiang Zhao, Wei Zhong Qian, Yao Wang, Fei Wei

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

Vertically aligned carbon nanotube (VACNT) arrays grown on ceramic spheres are obtained from ethylene using a floating catalysis process. The exhaust gas mainly contains light gaseous hydrocarbons, which decreases the contamination at the outlet of the reactor. Linear synchronous growth of the VACNT arrays is demonstrated and the morphology evolution of VACNT array grown on spheres is shown. The VACNT arrays on the spheres crack radially into a flower-like structure when the length of CNT is above 400 μm. The VACNT arrays grown on spheres still possess good flowability even when the length of the array reaches 1100 μm after a 2-h growth at 800 °C. The arrays on the spheres show good alignment, high purity and good graphitization. Meanwhile, with a decrease in temperature, the diameter of CNTs in the array correspondingly decreases, the distribution becomes narrower, and the growth rate decreases. The apparent activation energy is 180 ± 8 kJ/mol, indicating that ethylene is a good carbon source for fast and continuous radial growth of millimeter VACNT arrays on ceramic spheres.

Original languageEnglish (US)
Pages (from-to)1152-1158
Number of pages7
JournalCarbon
Volume46
Issue number8
DOIs
StatePublished - Jul 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Materials Science

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