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首页> 外文期刊>Journal of Crystal Growth >Growth temperature dependence of partially Fe filled MWCNT using chemical vapor deposition
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Growth temperature dependence of partially Fe filled MWCNT using chemical vapor deposition

机译：使用化学气相沉积法对部分铁填充的MWCNT的生长温度依赖性

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摘要

This investigation deals with the effect of growth temperature on the growth behavior of Fe filled multi-walled carbon nanotubes (MWCNTs). Carbon nanotube (CNT) synthesis was carried out in a thermal chemical vapor deposition (CVD) reactor in the temperature range 650-950 ℃ using propane as the carbon source, Fe as the catalyst material, and Si as the catalyst support. Atomic force microscopy (AFM) analysis of the catalyst exhibits that at elevated temperature clusters of catalyst coalesce and form macroscopic islands. Field emission scanning electron microscopy (FESEM) results show that with increased growth temperature the average diameter of the nanotubes increases but their density decreases. High-resolution transmission electron microscopy (HRTEM) studies suggest that the nanotubes have multi-walled structure with partial Fe filling for all growth temperatures. The X-ray diffraction (XRD) pattern of the grown materials indicates that they are graphitic in nature. The characterization of nanotubes by Raman spectroscopy reveals that the optimized growth temperature for Fe filled CNTs is 850 ℃, in terms of quality. A simple model for the growth of Fe filled carbon nanotubes is proposed.
机译：这项研究涉及生长温度对Fe填充的多壁碳纳米管（MWCNTs）的生长行为的影响。碳纳米管（CNT）的合成是在热化学气相沉积（CVD）反应器中，温度范围为650-950℃，使用丙烷作为碳源，Fe作为催化剂材料，Si作为催化剂载体。催化剂的原子力显微镜（AFM）分析显示，在高温下，催化剂簇聚结并形成宏观岛。场发射扫描电子显微镜（FESEM）结果表明，随着生长温度的升高，纳米管的平均直径增加，但密度降低。高分辨率透射电子显微镜（HRTEM）研究表明，纳米管具有多壁结构，在所有生长温度下均具有部分Fe填充。生长材料的X射线衍射（XRD）图谱表明它们本质上是石墨的。通过拉曼光谱法对纳米管进行表征表明，就质量而言，Fe填充的CNT的最佳生长温度为850℃。提出了填充Fe的碳纳米管生长的简单模型。

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