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      “Nanotraps” in porous electrospun fibers for effective removal of lead(II) in water

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      Author
      Senthamizhan A.
      Balusamy, B.
      Celebioglu A.
      Uyar, Tamer
      Date
      2016-02
      Source Title
      Journal of Materials Chemistry A
      Print ISSN
      2050-7488
      Publisher
      Royal Society of Chemistry
      Volume
      4
      Issue
      7
      Pages
      2484 - 2493
      Language
      English
      Type
      Article
      Item Usage Stats
      135
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      130
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      Abstract
      Here, we have put in conscientious effort to demonstrate the careful design of binding sites in fibers and their stability for enhanced adsorption of metal ions, which has proven to be a challenging task until now. Dithiothreitol capped gold nanoclusters (AuNCs) are successfully encapsulated into a cavity in the form of pores in electrospun porous cellulose acetate fibers (pCAFs) and their assembly creates a "nanotrap" for effective capture of Pb2+. The enhanced immobilization capacity of AuNCs into the interiors of the fibers and their non-aggregated nature offer enhanced adsorption sites, thus reaching maximum extraction capacity up to 1587 mg g-1 for Pb2+. The remarkable finding from this approach has shown that the diffusion of Pb2+ into the interiors of the AuNC encapsulated porous cellulose acetate fiber (pCAF/AuNC) is in line with the penetration depth of AuNCs. The effectiveness of the pCAF/AuNC has been compared with that of the AuNC decorated non-porous cellulose acetate fibers (nCAF/AuNC). The findings have shown a remarkable improvement in the adsorption efficiency by increasing the availability and stability of adsorption sites in the pCAF/AuNC. We strongly believe that the proposed approach might provide a new insight into developing nanotraps to eliminate the usual limitations including denaturation of adsorbents on supported matrices. © The Royal Society of Chemistry 2016.
      Keywords
      Adsorption
      Binding sites
      Cellulose
      Electrospinning
      Fibers
      Lead
      Metal ions
      Metals
      Nanoclusters
      Adsorption efficiency
      Cellulose acetate fibers
      Effective removals
      Electrospun fibers
      Enhanced adsorptions
      Enhanced immobilizations
      Extraction capacity
      Gold nanocluster
      Lead removal (water treatment)
      Cellulose Acetate
      Fibers
      Lead
      Porous Materials
      Water Treatment
      Permalink
      http://hdl.handle.net/11693/36685
      Published Version (Please cite this version)
      https://doi.org/10.1039/c5ta09166g
      Collections
      • Institute of Materials Science and Nanotechnology (UNAM) 1904
      • Nanotechnology Research Center (NANOTAM) 1055
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