Abstract
Bamboo-like carbon nanotube(BCNTs) with open ends,and carbon nanofibers(CNFs) were prepared from a coal-based carbon rod by a DC arc discharge.The coal-based carbon rod was made by carbonizing Chinese Bai-Yang-Shu anthracite with coal tar and pitch as binder.The BCNTs and CNFs were characterized by scanning and transmission electron microscopy,energy dispersive spectroscopy,and X-ray diffraction.It is found that BCNTs and CNFs grow as a deposit on the anode at a low helium pressure of 0.020MPa with the coal-based carbon rod as anode.Most of the BCNTs have an open end and a diameter of 50nm.CNFs with a diameter of 30-50nm form fluffy balls on the surface of the remaining anode.
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