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Capsular polypyrrole hollow nanofibers: an efficient recyclable adsorbent for hexavalent chromium removal

Zhao, Jian, Li, Zhenyu, Wang, Jinfeng, Li, Quanxiang and Wang, Xungai 2015, Capsular polypyrrole hollow nanofibers: an efficient recyclable adsorbent for hexavalent chromium removal, Journal of materials chemistry A, vol. 3, no. 29, pp. 15124-15132, doi: 10.1039/c5ta02525g.

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Title Capsular polypyrrole hollow nanofibers: an efficient recyclable adsorbent for hexavalent chromium removal
Author(s) Zhao, Jian
Li, Zhenyu
Wang, Jinfeng
Li, Quanxiang
Wang, Xungai
Journal name Journal of materials chemistry A
Volume number 3
Issue number 29
Start page 15124
End page 15132
Total pages 9
Publisher Royal Society of Chemistry
Place of publication London, Eng.
Publication date 2015-08-07
ISSN 2050-7488
2050-7496
Summary Capsular polypyrrole hollow nanofibers (PPy-HNFs) were fabricated via in situ polymerization of pyrrole on an organic-inorganic template, followed by acid etching. Their application in removing hexavalent chromium (Cr(vi)) from aqueous solution was then investigated. The morphologies of the capsular PPy-HNFs were studied by both scanning electron microscopy (SEM) and transmission electron microscopy (TEM), which showed that the PPy-HNFs had a capsular structure in the walls of hollow nanofibers. Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS) data confirmed the adsorption of Cr on capsular PPy-HNFs. The adsorption capacity increased with reduced pH of the initial solution and the adsorption process can be described using the pseudo-second-order model. These capsular PPy-HNFs showed a high Cr(vi) adsorption capacity up to 839.3 mg g-1. This adsorption capacity was largely retained even after five adsorption/desorption cycles. Electrostatic attraction between Cr and PPy-HNFs was studied using a proposed adsorption mechanism. The capsular PPy-HNFs formed a flexible membrane, which allowed easy handling during application. This study has demonstrated the possibilities of using this capsular PPy-HNF membrane for heavy metal removal from aqueous solution.
Language eng
DOI 10.1039/c5ta02525g
Field of Research 030306 Synthesis of Materials
050205 Environmental Management
Socio Economic Objective 960912 Urban and Industrial Water Management
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, RSC
Persistent URL http://hdl.handle.net/10536/DRO/DU:30080926

Document type: Journal Article
Collection: Institute for Frontier Materials
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