甲烷部分氧化气氛制备碳纳米管

碳纳米管是由碳六元环构成的类石墨平面卷曲而成的纳米级中空管,其中每个碳原子通过sp2杂化与周围3个碳原子发生完全键合,管的直径在几个纳米到几十个纳米之间,而轴向长度却可达几十微米甚至更长,故被称为准一维分子纳米材料.由于这种特殊结构,碳纳米管具有许多奇异的物理化学性能,如独特的导电性、极高的机械强度、润滑性和吸附能力等.自发现碳纳米管以来1],人们开展了多种方法进行制备研究,如电弧放电(Arcdischarge)2]、激光烧蚀(Laserablation)3]、碳氢化合物催化分解(Catalyticdecompositionofhydrocarbons)4]和化学气相沉积(Chem…

Carbon Nanotube Prepared in the Atmosphere of Partial Oxidation of Methane

In the present work, Ni Ce catalyst was used for the preparation of carbon nanotubes(CNTs) in the atmosphere of partial oxidation of methane(POM). Mainly growing on quartz wool or wall of reactor, the bulk CNTs were obtained. Probably CNTs were synthesized by two routes due to the typical reaction conditions of POM. One was that CNTs were produced from the decomposition of CH 4 on the Ni particles. After transported out of the catalyst zone by blowing of feedgas, CNTs adhered to quartz wool or the wall of reactor. Predominately, the other way was that firstly syngas was produced from POM reaction and then CNTs grew from disproportionation of CO in presence of hydrogen. A little remaining oxygen in effluent could remove the other morphologic carbon, so CNTs were easily opened and purified at the same time of growth. This research maybe arouse us to assemble the continuous process of POM and preparation of CNTs. CNTs were applied to be negative materials for lithium battery. The reversible electrical capacity of simulative lithium battery can be increased ca. 20% with adding 10%(in mass fraction) carbon nanotubes into natural graphite. WT5HZ]