摘要
采用催化化学气相沉积法将由C包覆的纳米铁颗粒(FeNP)原位沉积于碳纳米管(CNTs)表面并形成不同形貌的碳纳米管/纳米铁颗粒(CNTs/FeNP)杂化结构。使用扫描电子显微镜、透射电子显微镜对制备的杂化结构进行微观形貌分析和结构表征。结果显示,纳米铁颗粒通过石墨片层结构与碳纳米管相连,具有良好的界面结合。当噻吩的添加量较低时,产物中碳纳米管的直径减小,产量增多。当噻吩的添加量超过0.5%时,可以得到CNTs/FeNP杂化结构。使用X射线能谱仪、X射线衍射仪分析了杂化结构的成分及其相对含量,结果显示体系中的Fe主要以α-Fe、γ-Fe和Fe3C的形式存在,并且Fe的含量随噻吩含量的增加不断增加。通过研究纳米铁颗粒的形成及其在碳纳米管表面的沉积,揭示了CNTs/FeNP杂化结构的形成机理。
Through in situ depositing of iron nano particles （FeNP） coating with carbon on the surface of carbon nanotubes （CNTs）, different morphologies of CNTs/FeNP hybrid structures were prepared by catalytic chemi- cal vapor deposition method. The micro morphology and structure of hybrid structures were characterized using scanning electronic microscope and transmission electronic microscope. Results showed that iron nano particles were connected with CNTs through graphite sheet structures, with good interconnections. At low thiophene proportion, the diameter of CNTs decreased, and the amount of CNTs increased. When the thiophene propor- tion was higher than 0.5%, CNTs/FeNP hybrid structures were achieved. The components and relative pro- portions of hybrid structures were analyzed by X-ray energy dispersive spectroscopy and X-ray diffraction, it turns out that iron existed mainly on the form of a-Fe, y-Fe and Fe3C in the system; iron proportion increased with the increasing thiophene proportion. By studying the formation of iron nano particles and its deposition on the CNT surface, the formation mechanism of CNTs/FeNP hybrid structures was illustrated.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2012年第20期2839-2842,2847,共5页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51172184)
西北工业大学博士论文创新基金资助项目(CX200607)
关键词
碳纳米管
纳米铁颗粒
杂化结构
原位沉积
形成机理
carbon nanotubes
iron nano particles
hybrid structures
in situ deposition
formation mechanism
