Nano Archive

Kinetically controlled side-wall functionalization of carbon nanotubes by nitric acid oxidation

Yu, Hao and Jin, Yuguang and Peng, Feng and Wang, Hongjuan and Yang, Jian (2008) Kinetically controlled side-wall functionalization of carbon nanotubes by nitric acid oxidation. JOURNAL OF PHYSICAL CHEMISTRY C, 112 (17). pp. 6758-6763.

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Official URL: http://dx.doi.org/10.1021/jp711975a

Abstract

The nitric acid oxidation followed by sodium hydroxide washing was applied for functionalization of single-walled carbon nanotubes (SWCNTs), few-walled CNTs (FWCNTs), and multiwalled CNTs (MWCNTs). The surface functionalization of CNTs via acidic oxidation was studied by transmission electron microscopy, Raman scattering spectroscopy, thermogravimetric analysis, and X-ray photoelectron spectroscopy. The oxidation of CNTs involves the exfoliation of functionalized carbon layers into smaller carbonaceous fragments (CF), which might influence the performance of composite materials based on modified CNTs. Optimizing oxidation time increased the selectivity to thermodynamically unstable functionalized CNTs. Thicker CNTs, including FWCNTs and MWCNTs., are better for high-density surface functionalization, due to higher structure stability. It was proposed that a rational selection of the oxidation process and type of CNTs is important for the applications involving CNT-related composite materials.

Item Type:Article
Subjects:Material Science > Functional and hybrid materials
Physical Science > Nano objects
Material Science > Nanochemistry
ID Code:1358
Deposited By:Anuj Seth
Deposited On:09 Dec 2008 13:04
Last Modified:20 Jan 2009 09:42

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