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 journalArticlepeer-review

    25 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 languageEnglish
    Pages (from-to)253-256
    Number of pages4
    JournalMaterials Letters
    Volume108
    DOIs
    Publication statusPublished - 05 Aug 2013

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