TY - JOUR
T1 - Superhydrophobic graphene-coated sponge with microcavities for high efficiency oil-in-water emulsion separation
AU - Han, Longxiang
AU - Bi, Hengchang
AU - Xie, Xiao
AU - Su, Shi
AU - Mao, Peng
AU - Sun, Litao
N1 - Publisher Copyright:
© The Royal Society of Chemistry.
PY - 2020/9/14
Y1 - 2020/9/14
N2 - 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 ∼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.
AB - 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 ∼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.
UR - https://www.scopus.com/pages/publications/85090491880
U2 - 10.1039/d0nr04892e
DO - 10.1039/d0nr04892e
M3 - 文章
C2 - 32830837
AN - SCOPUS:85090491880
SN - 2040-3364
VL - 12
SP - 17812
EP - 17820
JO - Nanoscale
JF - Nanoscale
IS - 34
ER -