A simple route to coat mesoporous SiO2 layer on carbon nanotubes

被引：87

作者：

Ding, Kunlun ^{[1
]}

Hu, Baoji ^{[1
]}

Xie, Yun ^{[1
]}

An, Guimin ^{[1
]}

Tao, Ranting ^{[1
]}

Zhang, Hongye ^{[1
]}

Liu, Zhimin ^{[1
]}

机构：

[1] Chinese Acad Sci, BNLMS, Inst Chem, Beijing 100080, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2009年 / 19卷 / 22期

关键词：

SURFACTANT ADSORPTION; SINGLE; SILICA; DISPERSION; FUNCTIONALIZATION; MOLECULES; CHEMISTRY; SHELL; CORE;

D O I：

10.1039/b821386k

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：

Herein we present a simple method to coat a porous SiO2 layer on carbon nanotubes (CNTs) with the aid of the cationic surfactant cetyltrimethyl ammonium bromide (CTAB). The coating process was studied systematically, and a possible coating mechanism was proposed. Temperature and the ratio of CTAB/CNTs/H2O were found to play key role in the coating process. This method can be applied to both multiwalled carbon nanotubes (MWNTs) and single walled carbon nanotubes (SWNTs). The individualized nature of the CNTs (both MWNTs and SWNTs) was maintained during the coating process. Furthermore, Raman spectroscopy showed that this method is nondestructive to the electronic structure of CNTs. The CNT/porous SiO2 core/shell structure will serve as a platform for further surface functionalization of CNTs.

引用

页码：3725 / 3731

页数：7

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