Chemical oxidation of multiwalled carbon nanotubes

被引：2469

作者：

Datsyuk, V. ^{[1
]}

Kalyva, M. ^{[1
]}

Papagelis, K. ^{[2
]}

Parthenios, J. ^{[1
]}

Tasis, D. ^{[2
]}

Siokou, A. ^{[1
]}

Kallitsis, I. ^{[1
,3
]}

Galiotis, C. ^{[1
,2
]}

机构：

[1] Inst Chem Engn & High Temp Chem Proc, Fdn Res & Technol Hellas, GR-26504 Patras, Greece

[2] Univ Patras, Dept Mat Sci, GR-26504 Patras, Greece

[3] Univ Patras, Dept Chem, GR-26500 Patras, Greece

来源：

CARBON | 2008年 / 46卷 / 06期

关键词：

D O I：

10.1016/j.carbon.2008.02.012

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：

The effect of oxidation on the structural integrity of multiwalled carbon nanotubes through acidic (nitric acid and a mixture of sulfuric acid and hydrogen peroxide) and basic (ammonium hydroxide/hydrogen peroxide) agents has been studied. In order to purify the as-received material, a non-oxidative treatment (with hydrochloric acid) was also applied. Electron microscopy and thermogravimetric analysis clearly revealed that the nitric acid-treated material under reflux conditions suffered the highest degree of degradation, such as, nanotube shortening and additional defect generation in the graphitic network. Basic oxidative treatment led to the complete removal of amorphous carbon and metal oxide impurities but the structural integrity was found to be intact. X-ray photoelectron spectroscopy was employed to confirm the different functionalities produced for each oxidation agent, whereas titration measurements determined the relative concentration of carboxylic functions onto the graphitic surface. Moreover, a general relationship between the chemical treatment and the amount of non-graphitic carbon was established by means of Raman spectroscopy measurements. The possibility of controlling the required amount of functionality, carboxylic and hydroxyl, via these oxidation procedures is discussed. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：833 / 840

页数：8

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