Tailoring the diameters of vapor-grown carbon nanofibers

Tailoring the diameters of vapor-grown carbon nanofibers
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DOI:
10.1016/s0008-6223(99)00207-9
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发表时间:
2000-01-01
期刊:
影响因子:
10.9
通讯作者:
Shen, ZH
Shen, ZH
中科院分区:
材料科学2区
文献类型:
--
作者:
Fan, YY;Cheng, HM;Shen, ZH

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气相生长碳纳米纤维 (VGCNF) 的直径在 40-300 nm 范围内,可以在硫存在的情况下,在 1373-1473 K 的温度下,使用咆哮催化剂方法的合成参数进行定制。发现获得的 VGCNF 非常纯净且笔直,并且在某些参数下每批次内具有均匀的直径。 C/H 摩尔比较低。适当的S/C摩尔比以及适当较高的氢气和苯混合物的流量有利于较小直径的碳纳米纤维的生长。如果仔细控制合成参数,我们的结果表明,也可以获得直径为 5-40 nm 的 VGCNF。 (C) 2000 Elsevier Science Ltd. 保留所有权利。
Diameters in the range 40-300 nm for vapor-grown carbon nanofibers (VGCNFs) can be tailored using synthesis parameters with a Roaring catalyst method at temperatures of 1373-1473 K in the presence of sulfur. The VGCNFs obtained are found to be very pure and straight, and have uniform diameter within each batch for certain parameters. A lower molar ratio of C/H. appropriate molar ratio of S/C, and suitably higher flow-rate of the mixture of hydrogen and benzene help the growth of carbon nanofibers with smaller diameters. If the synthesis parameters are carefully controlled, our results show that VGCNFs with diameters of 5-40 nm can also be obtained. (C) 2000 Elsevier Science Ltd. All rights reserved.