TY - JOUR
T1 - Superhydrophilic fish-scale-like CuC2O4 nanosheets wrapped copper mesh with underwater super oil-repellent properties for effective separation of oil-in-water emulsions
AU - He, Huaqiang
AU - Zhang, Tian C.
AU - Li, Zhikai
AU - Liang, Ying
AU - Yuan, Shaojun
N1 - Funding Information:
The authors are grateful for the grants of the International (Regional) Joint Research Program of Sichuan Province ( 2021YFH0045 ) and the National Natural Science Foundation of China ( 21978182 ), the measurement of XRD pattern and EDS mapping spectra by the Institute of New Energy and Low Carbon Technology of Sichuan University, the SEM imaging DLS and ICP-OES measurements by the Engineering Teaching Center, School of Chemical Engineering, Sichuan University, and the XPS analysis by Zhang San from Shiyanjia Lab (www.shiyanjia.com).
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/10/20
Y1 - 2021/10/20
N2 - The development of efficient, facile and stable approach to separate water from oilfield emulsified oily wastewater is highly desired. In our work, inspired by oil-repellent property of fish scales with a thin layer of mucus and hierarchical structures, pioneering fish-scale-like CuC2O4 nanosheets wrapped (i.e., CuC2O4 NSW) on copper mesh surfaces were fabricated by a facile in-situ chemical etching. The unique vertically grown crisscross CuC2O4 nanosheet layer delivered a strong water capture ability to form a firm water film for achieving rapid and super oil repellence functionality. The 300-mesh CuC2O4 NSW copper mesh exhibited superior underwater superoleophobicity and was proven to treat emulsified oily wastewater effectively (with a water permeation flux being circa 2200 L·m−2·h−1 and COD value in filtrate at circa 54 mg·L−1). Furthermore, the 500-mesh CuC2O4 NSW copper mesh was demonstrated to effectively separate surfactant-stabilized oil-in-water emulsions (with a water permeation flux of 1000–2000 L·m−2·h−1 and COD value in filtrate < 55 mg·L−1). The good chemical, mechanical and thermal stability of the as-prepared mesh was further ascertained by different stability tests. With the efficient separation capability, good underwater super oil-repellent and self-cleaning abilities, the novel membrane prepared by the easily scaled-up method shows great potential for industrial applications.
AB - The development of efficient, facile and stable approach to separate water from oilfield emulsified oily wastewater is highly desired. In our work, inspired by oil-repellent property of fish scales with a thin layer of mucus and hierarchical structures, pioneering fish-scale-like CuC2O4 nanosheets wrapped (i.e., CuC2O4 NSW) on copper mesh surfaces were fabricated by a facile in-situ chemical etching. The unique vertically grown crisscross CuC2O4 nanosheet layer delivered a strong water capture ability to form a firm water film for achieving rapid and super oil repellence functionality. The 300-mesh CuC2O4 NSW copper mesh exhibited superior underwater superoleophobicity and was proven to treat emulsified oily wastewater effectively (with a water permeation flux being circa 2200 L·m−2·h−1 and COD value in filtrate at circa 54 mg·L−1). Furthermore, the 500-mesh CuC2O4 NSW copper mesh was demonstrated to effectively separate surfactant-stabilized oil-in-water emulsions (with a water permeation flux of 1000–2000 L·m−2·h−1 and COD value in filtrate < 55 mg·L−1). The good chemical, mechanical and thermal stability of the as-prepared mesh was further ascertained by different stability tests. With the efficient separation capability, good underwater super oil-repellent and self-cleaning abilities, the novel membrane prepared by the easily scaled-up method shows great potential for industrial applications.
KW - Anti-oil pollution
KW - Copper mesh
KW - CuCO nanosheets
KW - Surfactant-stabilized oil-in-water emulsions
KW - Underwater superoleophobicity
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U2 - 10.1016/j.colsurfa.2021.127133
DO - 10.1016/j.colsurfa.2021.127133
M3 - Article
AN - SCOPUS:85109537483
SN - 0927-7757
VL - 627
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
M1 - 127133
ER -