电弧法制备的TiC催化生长碳纤维

Carbon Nanofibers Catalyzed by Titanium Carbide Nanoparticles

利用电弧等离子体法制备了TiC纳米粒子，并以TiC纳米粒子为催化剂，乙炔为碳源，通过化学气相沉积（CVD）在管式炉中生长了纳米碳纤维。利用X射线衍射仪（XRD）、扫描电子显微镜（SEM）、高分辨率透射电子显微镜（HRTEM）等手段对TiC纳米粒子及碳纤维进行了表征。结果表明：得到的Tic晶型为面心立方，粒径在10～40nm之间，颗粒形貌规整、粒径均匀；以此为催化剂得到的碳纤维，既有直线形又有螺旋形，纤维以催化剂为中心对称生长，其直径与催化剂粒径大致相等。

Titanium carbide （TIC） nanoparticles were prepared by arc plasma method. These nanoparticles were used to catalyze the growth of carbon nanofibers （CNFs） in the tubular furnace with acetylene as carbon source. The morphology of titannium car- bide nanoparticles and carbonfibers were characterized by X-ray diffraction（XRD）, scan- ning electron microscope （SEM）, transmission electron microscope （TEM）, and high resolution transmission electron microscope （HRTEM）. The result showed that the TiC nanoparticles were FCC crystal,with a diameter between 10--40 nm, the CNFs were lineary or helical grown symmetry with the catalyst particles as the center, the diameter of the CNFs were roughly similar to the diameter of the TiC particles.