Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 4, Pages 4482-4493Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b18664
Keywords
graphene oxide; biomimetic mineralization; interface assembly; nacre-inspired design; oil-water separation
Funding
- National Natural Science Foundation of China [21822807, 21676127, 21776110]
- China Scholarship Council [201503170336]
- Natural Science Foundation of Jiangsu Province [BK20170532]
- China Postdoctoral Science Foundation [2017M620194]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1701023A]
- Natural Science Foundation of the Higher Education Institutions of Jiangsu Province, China [17KJB430011]
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Inspired by the mastoid structure of the lotus leaf and the robust layered structure of the nacre, a novel nacrelike graphene oxide-calcium carbonate (GO-CaCO3) hybrid mesh with superhydrophilic and underwater superoleophobic property was prepared for the first time, via a facile, economical, and environmentally friendly layer-by-layer (LBL) self-assembly method using commercially available stainless steel mesh (SSM) as a ready-made mask. Interestingly, GO nanosheets played a threefold role, regulating the growth of CaCO3 nanocrystals between the GO interlamination for constructing a brick-and-mortar structure, improving the interface stability via coordination assembly onto SSM, and creating strong hydration derived from rich oxygen-containing functional groups. The surface hydrophilicity and hierarchically micro/nanoscale structure of GO-CaCO3 artificial pearls imbed on the SSM, contributing to outstanding superhydrophilicity and underwater superoleophobicity. The biomimetic hybrid mesh exhibited a strong mechanical property with a Young's modulus of 25.4 +/- 2.6 GPa. The optimized hybrid mesh showed a high separation efficiency of more than 99% toward a series of oil/water mixtures with high flux. The low oil-adhesion force, high fatigue-resistance, chemical stability (acid/alkali/salt resistance), and excellent recycling performance enlighten the great prospects of GO-based nacrelike material for application in oily wastewater treatment.
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