Polyacrylonitrile/polyaniline core/shell nanofiber mat for removal of hexavalent chromium from aqueous solution: mechanism and applications

Polyacrylonitrile/polyaniline core/shell nanofibers were prepared viaelectrospinning followed by in situpolymerization of aniline. Nanofibers with different morphology were obtained by changing the polymerization temperature. When used as absorbent for Cr(vi) ions, the core/shell nanofiber mats exhi...

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Published inRSC advances Vol. 3; no. 23; pp. 8978 - 8987
Main Authors Wang, Jianqiang, Pan, Kai, Giannelis, Emmanuel P., Cao, Bing
Format Journal Article
LanguageEnglish
Published 01.01.2013
Subjects
Adsorption
Mats
Nanocomposites
Nanomaterials
Nanostructure
Polyacrylonitriles
Polyanilines
Shells
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Summary:Polyacrylonitrile/polyaniline core/shell nanofibers were prepared viaelectrospinning followed by in situpolymerization of aniline. Nanofibers with different morphology were obtained by changing the polymerization temperature. When used as absorbent for Cr(vi) ions, the core/shell nanofiber mats exhibit excellent adsorption capability. The equilibrium capacity is 24.96, 37.24, and 52.00 mg g super(-1) for 105, 156, and 207 mg L super(-1) initial Cr(vi) solution, respectively, and the adsorption capacity increases with temperature. The adsorption follows a pseudo second order kinetics model and is best fit using the Langmuir isotherm model. The mats show excellent selectivity towards Cr(vi) ions in the presence of competing ions albeit a small decrease in adsorption is observed. The mats can be regenerated and reused after treatment with NaOH making them promising candidates as practical adsorbents for Cr(vi) removal.
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ISSN:2046-2069
2046-2069
DOI:10.1039/c3ra40616d