Journal
NANOSCALE
Volume 12, Issue 34, Pages 17812-17820Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nr04892e
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Funding
- National Science Foundation of China [51420105003, 11327901]
- National Science Fund for Distinguished Young Scholars [11525415]
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Materials for emulsion separation with low pressure, high flux and high stability are of great interest in the treatment of oily wastewater. Herein, we report a facile strategy for the fabrication of PDMS and graphene coated melamine sponge (PG-MS), which can efficiently separate oil-in-water emulsions. In PG-MS, melamine sponge (MS) provides a three-dimensional porous structure, graphene constructs hydrophobic microcavities, and PDMS enhances the hydrophobic property of the material, forming a superhydrophobic material. The PG-MS shows high flux (experimentally 10 000 L m(-2)h(-1), and the effective flux increases with the thickness of the filter layer), high separation efficiency (oil content of the filtered water similar to 4.7 mg L(-1)can be discharged directly, with oil separation efficiency >99%), low pressure (applied to overcome water's gravity), and high stability (no obvious change in 20 cycles). Our study indicates that PG-MS has a wide range of applications in oil-in-water emulsion separation in industry and environmental sciences.
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