| Original Articles |
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Mössbauer Study of Catalytically Grown Carbon Nanotube |
| LI Qun-qing;FAN Shou-shan;HAN Wei-qiang;GAO Nai-fei;WANG Xin-rong |
| Department of Physics, Center of Atomic and Molecular Sciences, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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LI Qun-qing, FAN Shou-shan, HAN Wei-qiang et al 1998 Chin. Phys. Lett. 15 68-69 |
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Abstract The valence states of iron in iron catalysts, hydrogen reduced catalysts, and catalytically grown carbon nanotubes are determined by Mössbauer spectra, respectively. The results show that the iron exists as Fe, FeO, and α-Fe2O3 in hydrogen reduced catalysts, whereas it exists as Fe-C alloy, FeO, and α-Fe2O3 in the catalysts encapsulated in carbon nanotube. It is postulated that Fe in hydrogen reduced catalysts plays the main role in the formation of catalytically grown carbon nanotube.
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| Keywords:
76.80.+y
82.80.Ej
82.30.Vy
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Published: 01 January 1998
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| PACS: |
76.80.+y
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(M?ssbauer effect; other γ-ray spectroscopy)
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82.80.Ej
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(X-ray, M?ssbauer, and other γ-ray spectroscopic analysis methods)
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82.30.Vy
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(Homogeneous catalysis in solution, polymers and zeolites)
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