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Removal of copper ions from aqueous solution by adsorption onto novel polyelectrolyte film-coated nanofibrous silk fibroin non-wovens

Zhou, Weitao, Huang, Haitao, Du, Shan, Huo, Yingdong, He, Jianxin and Cui, Shizhong 2015, Removal of copper ions from aqueous solution by adsorption onto novel polyelectrolyte film-coated nanofibrous silk fibroin non-wovens, Applied surface science, vol. 345, pp. 169-174, doi: 10.1016/j.apsusc.2015.03.036.

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Title Removal of copper ions from aqueous solution by adsorption onto novel polyelectrolyte film-coated nanofibrous silk fibroin non-wovens
Author(s) Zhou, Weitao
Huang, Haitao
Du, Shan
Huo, Yingdong
He, Jianxin
Cui, Shizhong
Journal name Applied surface science
Volume number 345
Start page 169
End page 174
Total pages 6
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2015-08-01
ISSN 0169-4332
Keyword(s) Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Materials Science, Coatings & Films
Physics, Applied
Physics, Condensed Matter
Chemistry
Materials Science
Physics
Silk fibroin
Polyethylenimine
Coating
Adsorption
Filtering media
COATINGS
MATS
Summary In this approach, polyelectrolyte film-coated nanofibrous silk fibroin (SF) nonwovens were prepared from the alternate deposition of positively charged polyethylenimine (PEI) and negatively charged SF using electrostatic layer-by-layer (LBL) self-assembled technology. The composite membranes were characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectrometer. The SF-PEI multilayer-assembled nanofibers (less than five layers) were fine and uniform with the fiber diameter from 400 nm to 600 nm, and had very large surface area and high porosity (more than 70%). The amino groups of PEI were proved to be deposited onto SF nonwovens, which granted the coated nonwovens with potential applicability for copper ions adsorption. The PEI films coated SF substrate showed much higher copper ions adsorption capacity than that of ethanol treated SF nanofibers. Adding the number of PEI coated could enhance the Cu2+ adsorption capacity significantly. The maximum milligrams per gram of copper ions adsorbed reached 59.7 mg/g when the SF substrate was coated with 5 bilayers of SF-PEI. However, the copper ions adsorption capacity had no obvious change as the number of PEI continued to increase. These results suggest potential for PEL film-coated nanofibrous nonwovens as a new adsorbent for metal ions.
Language eng
DOI 10.1016/j.apsusc.2015.03.036
Field of Research 090404 Membrane and Separation Technologies
MD Multidisciplinary
Socio Economic Objective 969999 Environment not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30084772

Document type: Journal Article
Collection: Institute for Frontier Materials
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