催化燃烧法合成碳纳米线

The Preparation of Carbon Nanofiber by Catalytic Combustion

研究了碳源与催化剂先体对催化燃烧法制备的碳纳米线的影响。采用Cu薄片作为基底,分别采用甲醇、乙醇、丙酮作为碳源,Fe(NO3)3,Ni(NO3)2,Co(NO3)分别作为催化剂先体。将催化剂先体溶解到乙醇中,形成催化剂先体溶液,然后将其涂敷到铜基底上。干燥后,置于火焰中适当的位置,燃烧一定时间,便可制备出黑色絮状沉积物,即碳纳米线。对所制备的产物采用了扫描电子显微镜进行了表征。实验结果表明,使用丙酮、乙醇作为碳源,铁盐、镍盐作催化剂先体时生成的碳纳米线一致性较好。

It is very important to study the effects of carbon sources and catalyst precursors on synthesis of carbon nanofibers for controlled synthesis. The effects of those on carbon nanofibers synthesized by catalytic combustion process were studied. Ethanol, methanol, acetone were used as carbon sources, and iron nitrate, nickel nitrate, cobalt nitrate were employed as catalyst pre- cursors respectively. The catalyst precursor dissolved into the ethanol was dropped onto the substrate and dried in air at room temperature. Then, the substrate was placed into the central core of the flame to make the interaction of carbon sources with the catalysts precursors. The black carbon deposits were produced on the substrate after a desired time. As-grown carbon nanofibers were characterized by scanning electron microscopy （SEM）. The results indicate that the products will have a good uniformity with ethanol or acetone as carbon sources, and iron salt or nickel salt as catalyst precursors.