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

doi:10.1016/j.carbon.2008.04.017

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^*

^*Corresponding author for this work

Tsinghua University

Research output: Contribution to journal › Article › peer-review

90 Citations (Scopus)

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 language	English
Pages (from-to)	1152-1158
Number of pages	7
Journal	Carbon
Volume	46
Issue number	8
DOIs	https://doi.org/10.1016/j.carbon.2008.04.017
Publication status	Published - Jul 2008
Externally published	Yes

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title = "Radial growth of vertically aligned carbon nanotube arrays from ethylene on ceramic spheres",

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.",

author = "Qiang Zhang and Huang, {Jia Qi} and Zhao, {Meng Qiang} and Qian, {Wei Zhong} and Yao Wang and Fei Wei",

year = "2008",

month = jul,

doi = "10.1016/j.carbon.2008.04.017",

language = "English",

volume = "46",

pages = "1152--1158",

journal = "Carbon",

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T1 - Radial growth of vertically aligned carbon nanotube arrays from ethylene on ceramic spheres

AU - Zhang, Qiang

AU - Huang, Jia Qi

AU - Zhao, Meng Qiang

AU - Qian, Wei Zhong

AU - Wang, Yao

AU - Wei, Fei

PY - 2008/7

Y1 - 2008/7

N2 - 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.

AB - 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.

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DO - 10.1016/j.carbon.2008.04.017

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VL - 46

SP - 1152

EP - 1158

JO - Carbon

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

Abstract

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