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    Carbon quantum dots enabled tuning of the microphase structures of poly (ether-b-amide) membrane for CO2 separation

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    Name:
    Carbon quantum_acs.iecr.0c03432.pdf
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    1.169Mb
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    PDF
    Description:
    Accepted manuscript
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    Type
    Article
    Authors
    Shi, Fei
    Tian, Qianqian
    Wang, Jingtao
    Wang, Qi
    Shi, Feng
    Li, Yifan
    Nunes, Suzana Pereira cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Nanostructured Polymeric Membrane Lab
    Date
    2020-07-23
    Online Publication Date
    2020-07-23
    Print Publication Date
    2020-08-19
    Embargo End Date
    2021-07-23
    Permanent link to this record
    http://hdl.handle.net/10754/664489
    
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    Abstract
    In this study, molecular-level of mixed matrix membranes are prepared by incorporating two types of carbon quantum dots (QDs), polymer-like QDs (PQD) and graphene oxide QDs (GQD) into Pebax, a poly (ether-b-amide) copolymer. PQD is shown to destroy part of the intrinsic crystalline structure of Pebax as typical fillers do. By comparison, GQD has fewer functional groups and causes an interesting enhancement of the microphase separation of Pebax. The polyether domains become more segregated and more available for the selective CO2 permeation. As a result, the gas separation performance of the membranes is evidently enhanced. GQD outperforms PQD as filler and the encouraging enhancement occurs at lower loading. The membrane with 0.05 wt% GQD loading shows the optimal gas separation property while it is 1 wt% for PQD-doped membranes. A possible mechanism is tentatively proposed based on the findings of this study.
    Citation
    Shi, F., Tian, Q., Wang, J., Wang, Q., Shi, F., Li, Y., & Nunes, S. P. (2020). Carbon quantum dots enabled tuning of the microphase structures of poly (ether-b-amide) membrane for CO2 separation. Industrial & Engineering Chemistry Research. doi:10.1021/acs.iecr.0c03432
    Sponsors
    The study was financially supported by National Natural Science Foundation of China (21878277), Natural Science Foundation of Henan province (182300410268), and China Postdoctoral Science Foundation (2017T100538). We also gratefully acknowledge the financial supports from China Scholarship Council and King Abdullah University of Science and Technology, as well as the instrument support from Center of Advanced Analysis & Computational Science, Zhengzhou University.
    Publisher
    American Chemical Society (ACS)
    Journal
    Industrial & Engineering Chemistry Research
    DOI
    10.1021/acs.iecr.0c03432
    Additional Links
    https://pubs.acs.org/doi/10.1021/acs.iecr.0c03432
    ae974a485f413a2113503eed53cd6c53
    10.1021/acs.iecr.0c03432
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Environmental Science and Engineering Program

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