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    Influence of graphene oxide lateral size on the properties and performances of forward osmosis membrane

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    GO_size-manuscript final version submitted.pdf
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    Format:
    PDF
    Description:
    Accepted Manuscript
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    Type
    Article
    Authors
    Akther, Nawshad
    Yuan, Ziwen
    Chen, Yuan
    Lim, Sungil
    Phuntsho, Sherub
    Ghaffour, NorEddine cc
    Matsuyama, Hideto
    Shon, Hokyong
    KAUST Department
    Environmental Science and Engineering Program
    Biological and Environmental Sciences and Engineering (BESE) Division
    Water Desalination and Reuse Research Center (WDRC)
    KAUST Grant Number
    CRG2017
    URF/1/3404-01
    Date
    2020-03-20
    Online Publication Date
    2020-03-20
    Print Publication Date
    2020-06
    Embargo End Date
    2022-03-20
    Submitted Date
    2020-01-20
    Permanent link to this record
    http://hdl.handle.net/10754/662247
    
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    Abstract
    Graphene oxide (GO) has been widely explored for the improvement of thin-film composite (TFC) membrane performance. However, the influences of GO flake lateral size on the polyamide (PA) TFC membrane properties and performances have not been investigated. In this study, GO suspensions with an average flake size ranging from 0.01 to 1.06 μm2 were prepared by varying the sonication duration between 0 and 8 h. The different sized GO flakes were embedded in the PA layer to examine the effect of their size on the morphology and performances of TFC forward osmosis (FO) membranes. The specific reverse solute flux and water flux of the GO-modified thin-film nanocomposite (TFN) membranes improved by over 60% and 50%, respectively, when the average GO flake size was reduced from 1.06 to 0.01 μm2 due to the formation of a thinner and more uniform PA layer. Large GO flakes deteriorated membrane performance by creating impervious regions that obstructed the reaction between monomers during the interfacial polymerization process resulting in defective PA layer formation. Whereas, smaller GO flakes distributed more uniformly in the PA layer creating fewer defects, and demonstrated better desalination performance and antifouling property than the TFN membranes modified with larger GO flakes. These results deliver strategies for future improvements in GO or 2D nanomaterial-based TFN membranes, where smaller flake size can be beneficial for minimizing PA layer defects.
    Citation
    Akther, N., Yuan, Z., Chen, Y., Lim, S., Phuntsho, S., Ghaffour, N., … Shon, H. (2020). Influence of graphene oxide lateral size on the properties and performances of forward osmosis membrane. Desalination, 484, 114421. doi:10.1016/j.desal.2020.114421
    Sponsors
    The research reported in this paper was supported by King Abdullah University of Science and Technology (KAUST), Saudi Arabia through the Competitive Research Grant Program – CRG2017 (CRG6), Grant # URF/1/3404-01. H.K.S. and Y.C. acknowledge the support provided by the Australian Research Council under the Future Fellowships scheme (FT140101208 & FT160100107), ARC Industry Hub (IH170100009), Discovery Project (DP180102210) and Bhutan Trust Fund for Environmental Conservation (Grant No. MB0167Y16).
    Publisher
    Elsevier BV
    Journal
    Desalination
    DOI
    10.1016/j.desal.2020.114421
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S001191642030134X
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.desal.2020.114421
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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