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Issue 5, 2018
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Solution-processable, durable, scalable, fluorine-grafted graphene-based superhydrophobic coating for highly efficient oil/water separation under harsh environment

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Abstract

A simple, low-cost, efficient, and easily scaled-up process for fabricating materials with special wettability for efficient oil/water separation under harsh conditions remains a great challenge. Herein, a fluorine-grafted graphene-based coating was fabricated by a facile solution-processable dip-coating method. The coating, composed of fluorine-grafted graphene (f-rGO) and γ-oxo-1-pyrenebutyric acid (OPBA) as molecular glue, can densely adhere on the surface of commercial materials (e.g., polypropylene membrane, cotton fabric, and polyurethane foam) and can tolerate harsh practical environments such as boiling water, high acid, high base, and saturated salty solutions. Importantly, the coated membrane exhibits efficient separation of surfactant-stabilized water-in-oil emulsions under these harsh conditions with high recyclability and extreme flux as high as 1395 L m−2 h−1 only under gravity. The coated foam can uptake oils from an oil/water mixture with high absorption capacity and recyclability. The outstanding performances (including durability, recyclability, scalability, and resistance to harsh environments) of the coating highlights its practical applications for separation of emulsions and cleanup oil-spills.

Graphical abstract: Solution-processable, durable, scalable, fluorine-grafted graphene-based superhydrophobic coating for highly efficient oil/water separation under harsh environment

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Publication details

The article was received on 30 Dec 2017, accepted on 01 Feb 2018 and first published on 02 Feb 2018


Article type: Paper
DOI: 10.1039/C7NJ05182D
Citation: New J. Chem., 2018,42, 3819-3827
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    Solution-processable, durable, scalable, fluorine-grafted graphene-based superhydrophobic coating for highly efficient oil/water separation under harsh environment

    G. Guo, L. Liu, Q. Zhang, C. Pan and Q. Zou, New J. Chem., 2018, 42, 3819
    DOI: 10.1039/C7NJ05182D

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