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

Type
Article

Authors
Wang, Jianqiang
Pan, Kai
Giannelis, Emmanuel P.
Cao, Bing

KAUST Grant Number
KUS-C1-018-02

Date
2013

Abstract
Polyacrylonitrile/polyaniline core/shell nanofibers were prepared via electrospinning followed by in situ polymerization 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-1 for 105, 156, and 207 mg L-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. © The Royal Society of Chemistry 2013.

Citation
Wang J, Pan K, Giannelis EP, Cao B (2013) Polyacrylonitrile/polyaniline core/shell nanofiber mat for removal of hexavalent chromium from aqueous solution: mechanism and applications. RSC Adv 3: 8978. Available: http://dx.doi.org/10.1039/c3ra40616d.

Acknowledgements
This work is supported by the National Natural Science Foundation of China (5114304), the Central University of basic scientific research project of BUCT (ZZ1112) and the award by King Abdullah University of Science and Technology (KAUST) (KUS-C1-018-02).

Publisher
Royal Society of Chemistry (RSC)

Journal
RSC Advances

DOI
10.1039/c3ra40616d

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