用不同催化剂制备纳米炭纤维的生长机理  

COMPARING OF GROWTH MECHANISM OF CARBON NANOFIBERS PREMRED BY DIFFERENT CATALYSTS

作　　者：苏革[1] 杜金红[1] 范月英[1] 沈祖洪[1] 康宁[1] 成会明[1] 

机构地区：[1]中国科学院金属研究所

出　　处：《材料研究学报》2001年第6期623-628,共6页Chinese Journal of Materials Research

基　　金：国家自然科学基金50025204;八六三计划新材料领域715-004-0080资助项目.

摘　　要：研究了以Ｆｅ或 Ｎｉ为催化剂采用有机物催化热解法制备的纳米炭纤维的形貌和结构，发现在 两种情况下纳米炭纤维的生长机理完全不同：以Ｆｅ为催化剂纳米炭纤维基本符合气－液－固（ＶＬＳ）催 化生长机制（也称溶解扩散机制）；而以Ｎｉ为催化剂纳米炭纤维则符合固相催化生长机制．Vapor grown carbon nanofibers (VGCNFs) were prepared by catalytic decomposition of benzene using Fe as catalysts and Micro-coiled carbon nanofibers (MCCNFs) were prepared by catalytic decomposition of acetylene using Ni as catalyst. The morphology and microstructure of VGCNFs and MCCNFs were studied by SEM and TEM observations, and the growth mechanisms of VGCNFs and MCCNFs were discussed in detail. It is found that the growth process of VGCNFs using Fe as catalyst is completely different from that of MCCNFs using Ni as catalyst, and growth of VGCNFs prepared by Fe catalyst is basically in accordance with the VLS (vapor-liquid-solid) catalytic growth mechanism, but that of MCCNFs prepared by Ni csyslydy golloed the solid phase catalytic growth mechanism.

关 键 词：纳米炭纤维 催化剂 生长机理 有机物 催化热解 铁 镍 

分 类 号：TQ342.742[化学工程—化纤工业] TB383[一般工业技术—材料科学与工程]