Journal
DIAMOND AND RELATED MATERIALS
Volume 31, Issue -, Pages 50-57Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.diamond.2012.11.001
Keywords
Carbon nanotubes; Ni/MgO; Carbon monoxide; Catalyst structure; Plasma
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Funding
- National Natural Science Foundation of China [20990223]
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Ni/MgO solid solution catalyst was prepared by decomposition of nickel and magnesium nitrate using dielectric barrier discharge (DBD) plasma operated at atmospheric pressure and less than 175 degrees C. Well-defined lattice fringes of the Ni (111) plane are clearly observed in the plasma prepared Ni/MgO catalyst. The plasma prepared catalyst possesses fewer defects, compared to the catalyst prepared by thermal decomposition at elevated temperature. It results in a better balance between the carbon formation and the carbon nanotube (CNT) growth. The crystallinity of the Ni particle from thermal decomposition is more complex. It is difficult to distinguish the Ni planes with the thermal decomposed catalyst. CNTs from CO decomposition over the plasma made catalyst show a narrow diameter distribution with a high aspect ratio. The DBD plasma decomposition is a facile, simple and effective way for the preparation of Ni catalysts to fabricate high quality CNTs. (C) 2012 Elsevier B.V. All rights reserved.
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