Dispersion of carbon nanotubes in low pH aqueous solutions by means of alumina-coated silica nanoparticles

被引：27

作者：

Tsai, Yu-Chen ^{[1
]}

Chiu, Chian-Cheng ^{[1
]}

Tsai, Ming-Chieh ^{[1
]}

Wu, Jeng-Yue ^{[1
]}

Tseng, Tzu-Fan ^{[1
]}

Wu, Tzong-Ming ^{[2
]}

Hsu, Sung-Fu ^{[2
]}

机构：

[1] Natl Chung Hsing Univ, Dept Chem Engn, Taichung 402, Taiwan

[2] Natl Chung Hsing Univ, Dept Mat Sci & Engn, Taichung 402, Taiwan

来源：

CARBON | 2007年 / 45卷 / 14期

关键词：

D O I：

10.1016/j.carbon.2007.08.034

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：

A novel noncovalent and inorganic method was used to disperse multiwalled carbon nanotubes (MWCNTs) in aqueous solutions through alumina-coated silica (ACS) nanoparticle halos. MWCNTs were directly dispersed into a highly charged ACS nanoparticle aqueous solution without functionalization of their surfaces. The dispersed MWCNTs were characterized by transmission electron microscopy and atomic force microscopy. Raman spectroscopy of MWCNTs prepared from dispersion in the ACS solution revealed reduced bundling compared to the corresponding untreated MWCNTs. The characteristic Raman peak at about 1570 cm(-1), corresponding to the G band, shifted to a higher wavenumber with a narrower peak. It was possible to disperse up to 20 mg/mL of MWCNTs in a 1 wt% ACS nanoparticle aqueous solution at pH 2. This homogeneous MWCNT-ACS aqueous solution was stable for weeks after ultrasonication. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：2823 / 2827

页数：5

共 23 条

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