金属钴填充碳纳米管的微结构研究  

Micro-structural Features of Co-filled Carbon Nanotubes

作　　者：马希骋[1] 郑国斌[2] 冯景伟[2] 李凤照[3] 温树林[3] 

机构地区：[1]山东大学化学化工学院 [2]中国科学院上海硅酸盐研究所,上海200050 [3]山东大学材料科学与工程学院材料表征分析中心,济南250061

出　　处：《无机材料学报》2003年第6期1273-1279,共7页Journal of Inorganic Materials

摘　　要：以Co/硅胶为催化剂,采用化学催化法制备了金属Co填充的碳纳米管,并用高分辨透射电镜(HRTEM),微区电子衍射(SAED)及纳米束能谱分析(EDS)等现代手段对碳纳米管和填充物的形态和微结构进行了深入研究.结果表明,本实验采用的方法能获得大量的被金属Co填充的碳纳米管,填充物为具有面心立方结构的α-Co,填充的α-Co经常出现孪晶.本文还阐明了整个填充的微观过程并对生长机理进行了初步探讨.Cobalt-filled carbon nanotubes were prepared in situ in the decomposition of benzene over Co/silica-gel catalysts. Transmission electron microscopy (TEM) investigation showed that the products contained abundance of carbon nanotubes (CNTs) and most of them were filled with metallic nanoparticles or nanorods. High-resolution TEM (HRTEM), selected area electron diffraction (SAED) patterns and energy dispersive X-ray spectroscopy (EDS) confirmed the presence of Co inside the nanotubes. The encapsulated Co was further identified as alpha-Co with fcc structure, which frequently consists of twinned boundaries. Based on the experimental results, a possible growth mechanism of the Co-filled nanotubes was proposed.

关 键 词：碳纳米管 催化法 Co/硅胶 微结构 

分 类 号：TQ127[化学工程—无机化工]