Fe-Mo/Al<sub>2</sub>O<sub>3</sub>催化剂催化分解甲烷制备碳纳米管：温度对碳管结构的影响

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Fe-Mo/Al₂O₃催化剂催化分解甲烷制备碳纳米管：温度对碳管结构的影响

基金项目: 国家自然科学基金(20673135, 50534100)和中国科学院“百人计划”项目.

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China|
2.
Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Funds: National Natural Science Foundation of China (20673135, 50534100) and Chinese Academy of Sciences following the "100 Grant" Program.

摘要: 利用化学气相沉积法,以Fe-Mo/Al₂O₃为催化剂,催化分解甲烷气体制备碳纳米管（CNTs）。研究了温度，反应时间和气体流速对碳纳米管结构的影响。结果显示:温度是影响碳纳米管壁厚的关键参数。低温导致壁厚为2 nm~7 nm的多壁碳纳米管（MWCNTs）的生成。相对地，高温有利于双壁碳纳米管（DWCNTs）的生长，而更高的温度促使单壁碳纳米管（SWCNTs）的产生。进一步升高温度，得到了壁厚为3 nm~15 nm的MWCNTs和大的炭颗粒。
- 碳纳米管 /
- 纳米结构 /
- 气相沉积
Abstract: The effects of temperature, reaction time, and flow rate on the structure of carbon nanotubes (CNTs) were studied using catalytic chemical vapor deposition of methane over an Fe-Mo/Al₂O₃ catalyst. Results show that the temperature is a key parameter to control the wall thickness of the CNTs. Low temperature leads to the formation of multiwalled carbon nanotubes (MWCNTs) with wall thickness of 2–7 nm. Relatively high temperature is in favor of the growth of double-walled carbon nanotubes (DWCNTs), whereas high temperature promotes the generation of single-walled carbon nanotubes (SWCNTs). A further increase of temperature results in the generation of MWCNTs with a wall thickness of 3–15 nm and large carbon particles.
- Carbon nanotubes /
- Nanostructure /
- Vapor deposition

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