Nano Archive

Influence of hydrogen pretreatment condition on the morphology of Fe/Al2O3 catalyst film and growth of millimeter-long carbon nanotube array

Zhang, Hao and Cao, Gaoping and Wang, Zhiyong and Yang, Yusheng and Shi, Zujin and Gu, Zhennan (2008) Influence of hydrogen pretreatment condition on the morphology of Fe/Al2O3 catalyst film and growth of millimeter-long carbon nanotube array. JOURNAL OF PHYSICAL CHEMISTRY C, 112 (12). pp. 4524-4530.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp710338d

Abstract

We systematically studied the influence of pretreatment condition on the morphology of Fe/Al2O3 catalyst film and growth of millimeter-long carbon nanotube array (CNTA). The experimental results confirm that the morphology and activity of the catalyst films are very sensitive to the pretreatment condition. A uniformly dispersed and densely packed catalyst monolayer with high activity, which can be used to synthesize a 1.2-mm-long CNTA, is prepared by annealing the Fe (1.2 nm)/Al2O3 (30 nm) film at 800 degrees C for 8 min in 50 sccm hydrogen. Enhanced pretreatment with H-2 decreases the catalyst activity and suppresses the CNTA growth. The possible mechanism of catalyst annealing and CNTA growth is proposed and discussed for a better understanding of these phenomena.

Item Type:Article
Subjects:Material Science > Functional and hybrid materials
Physical Science > Nano objects
ID Code:2419
Deposited By:Farnush Anwar
Deposited On:07 Jan 2009 11:50
Last Modified:22 Jan 2009 09:30

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