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    Synthesis of Sub-10 nm Two-Dimensional Covalent Organic Thin Film with Sharp Molecular Sieving Nanofiltration

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    am-2017-19450v.R2.pdf
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    Type
    Article
    Authors
    Gadwal, Ikhlas
    Sheng, Guan cc
    Thankamony, Roshni
    Liu, Yang
    Li, Huifang
    Lai, Zhiping cc
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Chemical Engineering Program
    KAUST Solar Center (KSC)
    Physical Science and Engineering (PSE) Division
    KAUST Grant Number
    FCC/1/1972-19-01
    Date
    2018-04-05
    Online Publication Date
    2018-04-05
    Print Publication Date
    2018-04-18
    Permanent link to this record
    http://hdl.handle.net/10754/627417
    
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    Abstract
    We demonstrated here a novel and facile synthesis of two-dimensional (2D) covalent organic thin film with pore size around 1.5 nm using a planar, amphiphilic and substituted heptacyclic truxene based triamine and a simple dialdehyde as building blocks by dynamic imine bond formation at the air/water interface using Langmuir–Blodgett (LB) method. Optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM), all unanimously showed the formation of large, molecularly thin and free-standing membrane that can be easily transferred on different substrate surfaces. The 2D membrane supported on a porous polysulfone showed a rejection rate of 64 and 71% for NaCl and MgSO4, respectively, and a clear molecular sieving at molecular size around 1.3 nm, which demonstrated a great potential in the application of pretreatment of seawater desalination and separation of organic molecules.
    Citation
    Gadwal I, Sheng G, Thankamony RL, Liu Y, Li H, et al. (2018) Synthesis of Sub-10 nm Two-Dimensional Covalent Organic Thin Film with Sharp Molecular Sieving Nanofiltration. ACS Applied Materials & Interfaces. Available: http://dx.doi.org/10.1021/acsami.7b19450.
    Sponsors
    We acknowledge the support from the KAUST center competitive fund FCC/1/1972-19-01.
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Applied Materials & Interfaces
    DOI
    10.1021/acsami.7b19450
    PubMed ID
    29620857
    Additional Links
    https://pubs.acs.org/doi/10.1021/acsami.7b19450
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsami.7b19450
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division; Chemical Engineering Program; KAUST Solar Center (KSC)

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