Effects of the size of nano-copper catalysts and reaction temperature on the morphology of carbon fibers |
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Authors: | Qian Zhang |
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Affiliation: | Key Laboratory of Shandong Province for Nanostructured Materials, Qingdao University of Science & Technology, Qingdao 266042, People's Republic of China |
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Abstract: | In this study, carbon fibers with different morphologies, including coiled carbon nanofibers and straight carbon fibers, were obtained by the chemical vapor deposition using a Cu-catalytic pyrolysis of acetylene at 250 °C. The influences of nano-copper catalyst particle size and the reaction temperature on the morphology of carbon fibers were investigated. Under the same reaction condition, coiled carbon nanofibers generally were synthesized using nano-copper catalyst with smaller particles size, and bigger copper particles are apt to produce straight carbon fibers. With decreasing of reaction temperature to 200 °C, straight carbon fibers were obtained, instead of coiled carbon nanofibers at 250 °C. The product was characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and X-ray powder diffraction (XRD). |
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Keywords: | A Amorphous materials B Vapor deposition C Electron microscopy |
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