高温自生压法制备碳纳米管和碳纳米胶囊

Carbon nanotubes and carbon nanocapsules prepared by autogenic reactions

以四氢萘和四水合乙酸镍的混合物作为前驱体,采用高温自生压催化热解法在不同温度下制备碳纳米管、碳纳米胶囊。通过SEM、TEM、XRD和VSM对产物进行了表征测试。结果表明,随着反应温度的上升,产物中碳纳米管数量呈递增趋势。从800℃到1 000℃,碳纳米管的平均直径逐渐减小。催化剂的去活化作用导致了碳纳米胶囊结构的形成。

Carbon nanotubes（CNTs） and spherical carbon nanocapsules （CNCs） were prepared by using the method of reactions un- der autogenic pressure at elevated temperatures （RAPET）. A mixture of tetrahydratenaphthalene and nickel acetate was dissociated under the autogenic pressure. The synthetized CNTs and CNCs exhibited good graphitic quality. SEM, TEM, XRD and VSM were performed to characterize the products. The results showed that the yield of CNTs could be enhanced with the increase of temperature. The diameters decreased gradually from 800 ℃ to 1 000 ℃. The CNC structure was induced by the deactivation of catalyst.