碳纳米管管径的可控性研究  

Synthesis of carbon nanotubes with controlled cores

作　　者：魏任重[1,2,3] 沈友良[2] 李凤仪[1] 

机构地区：[1]南昌大学化学系,南昌330047 [2]江西科技师范学院材料表面工程研究所江西省材料表面工程重点实验室,南昌330013 [3]浙江大学化学工程与生物工程系,杭州310027

出　　处：《材料科学与工艺》2008年第6期830-834,共5页Materials Science and Technology

基　　金：国家自然科学基金资助项目(20263003)

摘　　要：为了合理有效控制碳纳米管(CNTs)的管径,比较研究了化学气相沉积(CVD)-模板法与CVD-中毒法.通过透射电镜(TEM)观察碳纳米管形貌及其管径尺寸,分析了不同条件下,碳纳米管的形貌差异,讨论了制备阳极氧化铝(AAO)膜的氧化电压对碳纳米管的管径、管的有序度的影响和碳酸钠毒物对碳纳米管的管径、管形、产率的影响,并且分析了两种制备方法的生长机理.结果表明,在CVD-模板法中,在一定范围内,电压升高可以使AAO膜孔增大,从而控制碳纳米管的外径;在CVD-中毒法中,微量的碳酸钠粉末能增大碳纳米管的内径.Carbon nanotubes （CNTs） with controlled cores were prepared respectively, via the template-CVD method and the poison-CVD method successfully. By means of transmission electron microscopy （TEM） techniques, their structures were characterized in different conditions. Both the effects of oxidation voltage in template-CVD method and the effects of content of sodium carbonate power in poison-CVD method ON carbon nanotubes＇ inner diameters were discussed. In addition, two distinguishing growth mechanisms were analyzed based on the TEM image. As a result, the diameter can be controlled by the oxidation voltage in template- CVD method and the addition of sodium carbonate power can increase the inner diameter in poison-CVD method in a certain range.

关 键 词：碳纳米管 碳酸钠 CVD-中毒法 CVD-模板法 

分 类 号：O613.71[理学—无机化学] TB383[理学—化学]