A facile and novel approach towards carboxylic acid functionalization of multiwalled carbon nanotubes and efficient water dispersion

Ata Ur Rehman; Syed Mustansar Abbas; Hafiz Muhammad Ammad; Amin Badshah; Zulfiqar Ali; Dalaver Hussain Anjum

doi:10.1016/j.matlet.2013.07.009

A facile and novel approach towards carboxylic acid functionalization of multiwalled carbon nanotubes and efficient water dispersion

Ata Ur Rehman, Syed Mustansar Abbas, Hafiz Muhammad Ammad, Amin Badshah, Zulfiqar Ali, Dalaver Hussain Anjum

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

A convenient, cheap and mild covalent functionalization route for multiwalled carbon nanotubes (MWCNTs) have been developed for the first time. The MWCNTs were treated with wet chemical oxidants (NaNO₂/HCl, HNO₃/H₂O₂) in order to modify MWCNTs with carboxyl groups. Surface functionality groups and morphology of MWCNTs were analyzed by FTIR, TGA, SEM and TEM. The results consistently confirmed the formation of carboxyl functionalities on MWCNTs, while the structure of MWCNTs has remained relatively intact. Functionalized MWCNTs showed good dispersion in aqueous media than untreated MWCNTs. Results show that NaNO₂/HCl treatment is best suited for the chemical functionalization, giving optimum surface carboxyl groups and minimum length shortening of MWCNTs.

Original language	English
Pages (from-to)	253-256
Number of pages	4
Journal	Materials Letters
Volume	108
DOIs	https://doi.org/10.1016/j.matlet.2013.07.009
Publication status	Published - 05 Aug 2013

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10.1016/j.matlet.2013.07.009

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title = "A facile and novel approach towards carboxylic acid functionalization of multiwalled carbon nanotubes and efficient water dispersion",

abstract = "A convenient, cheap and mild covalent functionalization route for multiwalled carbon nanotubes (MWCNTs) have been developed for the first time. The MWCNTs were treated with wet chemical oxidants (NaNO2/HCl, HNO3/H2O2) in order to modify MWCNTs with carboxyl groups. Surface functionality groups and morphology of MWCNTs were analyzed by FTIR, TGA, SEM and TEM. The results consistently confirmed the formation of carboxyl functionalities on MWCNTs, while the structure of MWCNTs has remained relatively intact. Functionalized MWCNTs showed good dispersion in aqueous media than untreated MWCNTs. Results show that NaNO2/HCl treatment is best suited for the chemical functionalization, giving optimum surface carboxyl groups and minimum length shortening of MWCNTs.",

keywords = "Carbon nanotubes, Defects, FTIR, Oxidation, Surfaces",

author = "Rehman, {Ata Ur} and Abbas, {Syed Mustansar} and Ammad, {Hafiz Muhammad} and Amin Badshah and Zulfiqar Ali and Anjum, {Dalaver Hussain}",

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T1 - A facile and novel approach towards carboxylic acid functionalization of multiwalled carbon nanotubes and efficient water dispersion

AU - Rehman, Ata Ur

AU - Abbas, Syed Mustansar

AU - Ammad, Hafiz Muhammad

AU - Badshah, Amin

AU - Ali, Zulfiqar

AU - Anjum, Dalaver Hussain

PY - 2013/8/5

Y1 - 2013/8/5

N2 - A convenient, cheap and mild covalent functionalization route for multiwalled carbon nanotubes (MWCNTs) have been developed for the first time. The MWCNTs were treated with wet chemical oxidants (NaNO2/HCl, HNO3/H2O2) in order to modify MWCNTs with carboxyl groups. Surface functionality groups and morphology of MWCNTs were analyzed by FTIR, TGA, SEM and TEM. The results consistently confirmed the formation of carboxyl functionalities on MWCNTs, while the structure of MWCNTs has remained relatively intact. Functionalized MWCNTs showed good dispersion in aqueous media than untreated MWCNTs. Results show that NaNO2/HCl treatment is best suited for the chemical functionalization, giving optimum surface carboxyl groups and minimum length shortening of MWCNTs.

AB - A convenient, cheap and mild covalent functionalization route for multiwalled carbon nanotubes (MWCNTs) have been developed for the first time. The MWCNTs were treated with wet chemical oxidants (NaNO2/HCl, HNO3/H2O2) in order to modify MWCNTs with carboxyl groups. Surface functionality groups and morphology of MWCNTs were analyzed by FTIR, TGA, SEM and TEM. The results consistently confirmed the formation of carboxyl functionalities on MWCNTs, while the structure of MWCNTs has remained relatively intact. Functionalized MWCNTs showed good dispersion in aqueous media than untreated MWCNTs. Results show that NaNO2/HCl treatment is best suited for the chemical functionalization, giving optimum surface carboxyl groups and minimum length shortening of MWCNTs.

KW - Carbon nanotubes

KW - Defects

KW - FTIR

KW - Oxidation

KW - Surfaces

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A facile and novel approach towards carboxylic acid functionalization of multiwalled carbon nanotubes and efficient water dispersion

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