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    Rational design of a bi-layered reduced graphene oxide film on polystyrene foam for solar-driven interfacial water evaporation

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    Type
    Article
    Authors
    Shi, Le cc
    Wang, Yuchao
    Zhang, Lianbin cc
    Wang, Peng cc
    KAUST Department
    Biological and Environmental Sciences and Engineering (BESE) Division
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    KAUST Grant Number
    OCRF-2014-CRG3-62140400
    Date
    2017
    Permanent link to this record
    http://hdl.handle.net/10754/623430
    
    Metadata
    Show full item record
    Abstract
    Solar-driven water evaporation has been emerging as a highly efficient way for utilizing solar energy for clean water production and wastewater treatment. Here we rationally designed and fabricated a bi-layered photothermal membrane with a porous film of reduced graphene oxide (rGO) on the top and polystyrene (PS) foam at the bottom. The top porous rGO layer acts as a light absorber to harvest and convert light efficiently to thermal energy and the bottom PS layer, which purposefully disintegrates water transport channels, acts as an excellent thermal barrier to minimize heat transfer to the nonevaporative bulk water. The optimized bi-layered membrane was able to produce water evaporation rate as high as 1.31 kg m−2 h−1 with light to evaporation conversion efficiency as high as 83%, which makes it a promising photothermal material in the literature. Furthermore, the experiments and theoretical simulation were both conducted to examine the relationship between the overall energy efficiency and the depth of the photothermal material underwater and the experimental and simulations results coincided with each other. Therefore, this work provides systematic evidence in support of the concept of the interfacial heating and shines important light on practical applications of solar-driven processes for clean water production.
    Citation
    Shi L, Wang Y, Zhang L, Wang P (2017) Rational design of a bi-layered reduced graphene oxide film on polystyrene foam for solar-driven interfacial water evaporation. J Mater Chem A. Available: http://dx.doi.org/10.1039/c6ta09810j.
    Sponsors
    This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. OCRF-2014-CRG3-62140400 and is also supported by KAUST CCF fund awarded to Water Desalination and Reuse Center (WDRC). The authors are grateful to the other members of the KAUST Environmental Nanotechnology group for the helpful discussions. Le Shi would like to thank Xiaolei Wang and Buyi Yan for their kind help for the simulation.
    Publisher
    Royal Society of Chemistry (RSC)
    Journal
    J. Mater. Chem. A
    DOI
    10.1039/c6ta09810j
    Additional Links
    http://pubs.rsc.org/en/Content/ArticleLanding/2017/TA/C6TA09810J#!divAbstract
    ae974a485f413a2113503eed53cd6c53
    10.1039/c6ta09810j
    Scopus Count
    Collections
    Articles; Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program; Water Desalination and Reuse Research Center (WDRC)

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