镍催化热解乙炔制备碳纳米纤维  

Synthesis of Platelet-stacked Carbon Nanofibers by Ni-catalyzed Pyrolysis of Acetylene

作　　者：全慧娟[1] 席红安[1] 李勤[1] 王若钉[1] 

机构地区：[1]中国科学院上海硅酸盐研究所,上海200050

出　　处：《无机材料学报》2005年第3期735-739,共5页Journal of Inorganic Materials

摘　　要：在较低温度(450-800℃)下以氧化铝基板负载的镍为催化剂,催化热解乙炔合成碳纳米纤维.扫描电镜和透射电镜观察表明,反应温度决定碳纳米纤维的尺寸和结构,在550℃下制备的碳纳米纤维一般具有类似弹簧状的结构,而在700℃下制备的碳纳米纤维则偏向于片状堆积结构,并介绍了片状堆积结构的生长机理.Carbon nanofibers were synthesized by catalytic pyrolysis of acetylene on Ni-coated alumina flakes at 450-800 degrees C. SEM and TEM observations indicated that the diameters and structure of carbon nanofibers were strongly affected by temperatures, the carbon nanofibers synthesized at 550 degrees C had a coil-like shape, while the products obtained at 700 degrees C contained many platelet-stacked nanofibers. A growth model was proposed to explain the structure of the platelet-stacked nanofibers.

关 键 词：碳纳米纤维 催化热解 NI催化剂 C2H2 

分 类 号：O613[理学—无机化学]