Characterization of single-wall carbon nanotubes by N2 adsorption

被引：113

作者：

Li, FX ^{[1
]}

Wang, Y ^{[1
]}

Wang, DZ ^{[1
]}

Wei, F ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem Engn, Beijing 100084, Peoples R China

来源：

CARBON | 2004年 / 42卷 / 12-13期

基金：

中国国家自然科学基金;

关键词：

carbon nanotubes; adsorption; BET surface area; microporosity;

D O I：

10.1016/j.carbon.2004.02.025

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

N-2 adsorption isotherms at 77 K of single-wall carbon nanotubes (SWNTs), multi-wall carbon nanotubes (MWNTs), and mixtures of these carbon nanotubes (CNTs) were analyzed for differences in their pore size distributions (PSDs). The PSDs, calculated in the microporous region by the Horvath-Kawazoc method and in the mesoporous region by the BJH method, are in agreement with the structures of both types of CNTs deduced from high-resolution transmission electron microscopy. A characteristic peak in the microporous region in the PSD of SWNTs is not present in the PSDs of MWNTs and impurities such as amorphous carbon, metal residues of catalysts, etc. The evaluation of this peak is proposed as a convenient toot for the quantitative characterization of SWNT purity in carbon nanotube-containing samples. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：2375 / 2383

页数：9

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