改进浮动催化化学气相沉积法制备直径可控的多壁碳纳米管

李亚娟; 马昌; 康建立; 史景利; 石强; 伍大恒

doi:10.1016/S1872-5805(17)60120-3

改进浮动催化化学气相沉积法制备直径可控的多壁碳纳米管

doi: 10.1016/S1872-5805(17)60120-3

1.
天津工业大学材料科学与工程学院, 天津 300387;
2.
四川创越炭材料有限公司, 四川阆中 637400

基金项目: 天津市应用基础与前沿技术研究计划（4JCYBJC20900）；天津市自然科学基金（16JCQNJC06300）；国家自然科学基金（51502201）.

详细信息

作者简介:
李亚娟,硕士研究生.E-mail:liyajuan57@126.com

通讯作者:
史景利,教授.E-mail:shijingli1963@163.com

中图分类号: TQ127.1⁺1
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出版历程
- 录用日期: 2017-06-28
- 刊出日期: 2017-06-28

Preparation of diameter-controlled multi-wall carbon nanotubes by an improved floating-catalyst chemical vapor deposition method

1.
School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China;
2.
Sichuan Innovation and Surpassing Carbon Materials Co., LTD, Langzhong 637400, China

Funds: Tianjin Research Program of Application Foundation and Advanced Technology (4JCYBJC20900);Natural Science Foundation of Tianjin Province (16JCQNJC06300);National Natural Science Foundation of China (51502201).

摘要

摘要: 采用改进的浮动催化化学气相沉法（FCCVD）制了直径可控的多壁碳纳米管（MWCNTs）。改进的FCCVD方法关键在于甲苯以气体的形式进入反应体系避免液体甲苯在高温下瞬间气化造成CNTs直径不可控。考察了二茂铁升华温度、载气中氢气含量，载气流量等因素对MWCNTs的直径影响。结果表明：改变二茂铁的升华温度可以控制CNTs的直径分布，当二茂铁升华温度从348 K升高到378 K时，MWCNTs的直径分布从30~130 nm降到60~90 nm；氢气的存在使得CNTs的直径大幅度的减小，当氢气含量为30 vol%时，碳纳米管的直径降至为20~40 nm；提高载气流速也使得CNTs直径随着载气流量的增加而逐渐减小。
- 改良的浮动催化化学气相沉积法 /
- 多壁碳纳米管 /
- 甲苯 /
- 二茂铁
Abstract: Multi-wall carbon nanotubes (MWCNTs) with controlled diameters were synthesized by an improved-floating catalyst chemical vapor deposition method,using toluene and ferrocene as a carbon source and catalyst precursor,respectively.Ferrocene was sublimed in a heater and carried as a gas mixed with toluene vapor into a reactor where MWCNTs were formed.The effects of the sublimation temperature,hydrogen content in the gas mixture and gas flow rate on the diameter and diameter distribution of the CNTs formed were investigated.Results indicated that the CNT diameter distributions could be controlled by changing the sublimation temperature.The higher the sublimation temperature,the narrower the distribution of CNT diameters.The average CNT diameter decreased and levelled off with increasing hydrogen content in the gas mixture from 0 to 40 vol%.The CNT diameter decreased with increasing gas flow rate.
- Improved floating catalytic chemical vapor deposition /
- Multi-walled carbon nanotubes /
- Toluene /
- Ferrocene

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