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中文摘要：
采用乙醇火焰燃烧,通过在镍基板上涂敷催化剂前驱体制备碳纳米管。借助扫描电子显微镜、透射电子显微镜、XRD和拉曼光谱等分析了不同催化剂对碳纳米管形貌及结构的影响。结果表明：在乙醇火焰中,对碳纳米管生成起催化作用的是金属氧化物纳米粒子,其催化活性的顺序为：氧化镍〉氧化铬〉氧化钼〉氧化钴。催化剂不仅影响碳纳米管的生长速率,而且碳纳米管的直径和管壁的石墨结晶状态也随催化剂的不同而不同。
英文摘要：
Effects of catalysts on the processing and morphology of carbon nanotubes （CNTs） prepared by the flame combustion of ethanol were investigated. The respective growth rate of CNTs shows that the performance of catalysts is in the order of NiO〉Cr2O3〉MoO2〉CoO. The average diameter of CNTs follows the sequence of CNTs-Mo≥CNTs-Ni〉CNTs-Cr≥ CNTs-Co. The crystallinity of CNTs is also dependent on the catalyst. The crystallinity of CNTs synthesized from Cr2O3 catalyst is lower than that from other catalysts. The results indicate that the growth rate, the diameter, and the crystallinity of CNTs can be manipulated by the selection of the catalysts.
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