Discriminating the carboxylic groups from the total acidic sites in oxidized multi-wall carbon nanotubes by means of acid-base titration

Ana Belén González-Guerrero, Ernest Mendoza, Eva Pellicer, Francesc Alsina, César Fernández-Sánchez, Laura M. Lechuga

Research output: Contribution to journalArticleResearchpeer-review

47 Citations (Scopus)

Abstract

This work reports on the quantitative determination of the carboxylic groups created upon HNO3 treatment at multi-wall carbon nanotube (MWCNT) surface. To this purpose, MWCNTs have been oxidized by refluxing in acid for different periods of time (from 1 h to 12 h). The main goal of the present study comprises the development of a simple analytical methodology based on Boehm's titration that enables the rapid estimation of the total carboxylic groups and their discrimination from the total oxidized sites created at MWCNT surface as a result of the acid treatment. The trends observed are correlated with Raman spectroscopy analyses. © 2008 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)256-259
JournalChemical Physics Letters
Volume462
DOIs
Publication statusPublished - 10 Sep 2008

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