无机材料学报

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金属钴填充碳纳米管的微结构研究

马希骋1,2; 郑国斌3; 冯景伟2; 李凤照2; 温树林2   

  1. 1. 山东大学化学化工学院; 2. 山东大学材料科学与工程学院材料表征分析中心, 济南 250061; 3. 中国科学院上海硅酸盐研究所, 上海 200050
  • 收稿日期:2002-10-08 修回日期:2002-01-13 出版日期:2003-11-20 网络出版日期:2003-11-20

Micro-structural Features of Co-filled Carbon Nanotubes

MA Xi-Cheng1,2; ZHENG Guo-Bin3; FENG Jing-Wei3; LI Feng-Zhao2; WEN Shu-Lin2   

  1. 1.School of Chemistry and Chemical Engineering; Shandong University; Jinan 250061; China; 2.School of Material Science and Engineering; Characterization and Analysis Center for Materials; Shandong University; Jinan 250061; China; 3. Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:2002-10-08 Revised:2002-01-13 Published:2003-11-20 Online:2003-11-20

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.

关键词: 碳纳米管, 催化法, Co/硅胶, 微结构

Abstract: 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.

Key words: carbon nanotubes, catalysis, Co/silica-gel, microstructure

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