Activated carbon catalyzing the formation of carbon nanotubes |
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Authors: | Jinling Song Shouai Feng Jianghong Zhao Zhenping Zhu |
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Affiliation: | a State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, P.O. Box 165, Taiyuan, Shanxi 030001, PR China b School of Rare Earth, Inner Mongolia University of Science and Technology, Inner Mongolia 014010, PR China |
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Abstract: | Activated carbon (AC), a common carbon material, is employed as catalyst to synthesize carbon nanotubes (CNTs) through chemical vapor deposition (CVD) and detonation-assisted CVD methods. The results show AC can effectively catalyze CNT formation. From the microscopic observations on morphologies and structures of the formed intermediates, it is found that carbon-catalyzed CNT formation follows particle-wire-tube stepwise evolution mechanism, in which carbon nanoparticles first assemble into wire-like nanostructures, then evolve into nanotubes via particle-particle coalescence and structural crystallization. |
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Keywords: | A Amorphous materials A Nanostructures B Vapor deposition C Electron microscopy |
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