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（英文）

发布时间：2018-02-03 17:18

本文关键词： 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　出处：《新型炭材料》2017年03期 　论文类型：期刊论文

【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。
[Abstract]:MWCNTs with controllable diameter were prepared by modified floating catalytic chemical vapor precipitation (FCCVD) method. The key of the improved FCCVD method is that toluene enters the reaction system in the form of gas to avoid the CNTs diameter being uncontrollable caused by the instantaneous gasification of liquid toluene at high temperature. The sublimation temperature of ferrocene was investigated. The results show that the diameter distribution of MWCNTs can be controlled by changing the sublimation temperature of ferrocene. When ferrocene sublimation temperature increased from 348 K to 378 K, the diameter distribution of MWCNTs decreased from 30 ~ 130 nm to 60 ~ 90 nm. The diameter of CNTs decreases greatly with the presence of hydrogen, and the diameter of carbon nanotubes decreases to 20 ~ 40 nm when the hydrogen content is 30 volr%. With the increase of carrier flow velocity, the diameter of CNTs decreases with the increase of carrier gas flow rate.
【作者单位】：天津工业大学材料科学与工程学院;四川创越炭材料有限公司;
【基金】：Tianjin Research Program of Application Foundation and Advanced Technology(4JCYBJC20900) Natural Science Foundation of Tianjin Province(16JCQNJC06300) National Natural Science Foundation of China(51502201)~~
【分类号】：O613.71;TB383.1
【正文快照】： 2.四川创越炭材料有限公司,四川阆中637400)Preparation of diameter-controlled multi-wall carbon nanotubes byan improved floating-catalyst chemical vapor deposition methodLI Ya-juan1,MA Chang1,KANG Jian-li1,SHI Jing-li1,SHI Qiang2,WU Da-heng1(1.School of Mat

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