TY - JOUR
T1 - Superhydrophobic palmitic acid modified Cu(OH)2/CuS nanocomposite-coated copper foam for efficient separation of oily wastewater
AU - Li, Ji
AU - Gao, Ruixi
AU - Wang, Yuan
AU - Zhang, Tian C.
AU - Yuan, Shaojun
N1 - Funding Information:
The authors acknowledge the research funds supported by the International (Regional) Joint Research Program of Department of Science and Technology of Sichuan Province (2021YFH0045), the National Natural Science Foundation of China (21978182) and the Open Fund of Key Laboratory of Icing and Anti/De-icing (Grant No. IADL20190305). The authors also thank Dr. Yingming Zhu for the measurement of XRD pattern, SEM and EDS mapping spectra by the Institute of New Energy and Low Carbon Technology of Sichuan University, Dr. Xiang Lin, Mr Yuanlong Wang and Dr. Pan Wu for the FTIR, Electrochemical and DLS measurements by the Engineering Teaching Center, School of Chemical Engineering, Sichuan University, and Miss Panpan Li from Shiyanjia Lab (www.shiyanjia.com) for the XPS characterization.
Funding Information:
The authors acknowledge the research funds supported by the International (Regional) Joint Research Program of Department of Science and Technology of Sichuan Province ( 2021YFH0045 ), the National Natural Science Foundation of China ( 21978182 ) and the Open Fund of Key Laboratory of Icing and Anti/De-icing (Grant No. IADL20190305 ). The authors also thank Dr. Yingming Zhu for the measurement of XRD pattern, SEM and EDS mapping spectra by the Institute of New Energy and Low Carbon Technology of Sichuan University, Dr. Xiang Lin, Mr Yuanlong Wang and Dr. Pan Wu for the FTIR, Electrochemical and DLS measurements by the Engineering Teaching Center, School of Chemical Engineering, Sichuan University, and Miss Panpan Li from Shiyanjia Lab ( www.shiyanjia.com ) for the XPS characterization.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/3/20
Y1 - 2022/3/20
N2 - Developing an efficient, simple, and low-cost oil-water separation technologies is critical to address the challenges of oily wastewater treatment. In this work, a nanoflower-like CuS embedded into Cu(OH)2 nanowire arrays (Cu(OH)2/CuS) were grown on the surfaces of copper foam (CF) by combination of chemical etching and ion exchange methods, and subsequent modification with palmitic acid (PA) was performed to achieve superhydrophobic CF/Cu(OH)2/CuS-PA oil-adsorption materials. The reaction conditions of ion exchange such as the Na2S concentration and immersion time were demonstrated to be key factors to form hierarchical Cu(OH)2/CuS nanowire arrays, and thus further significantly influenced the hydrophobicity of the copper foam. Such superhydrophobic CF/Cu(OH)2/CuS-PA with a static water contact angle of 153.4° delivered a high separation efficiency of oil-water mixtures at 98.8%, and the separation efficiency was always up to 97.6% for various water-in-oil emulsions. After operating successive 30 cycles of oil-water separation, the high separation efficiency remained unchanged. The CF/Cu(OH)2/CuS-PA also presented high stability, good anti-corrosion and mechanical properties in harsh environments. Thus, this superhydrophobic copper foam offers a potentially promising three-dimensional adsorbent for practical application of spill oil recovery and oil/water separation.
AB - Developing an efficient, simple, and low-cost oil-water separation technologies is critical to address the challenges of oily wastewater treatment. In this work, a nanoflower-like CuS embedded into Cu(OH)2 nanowire arrays (Cu(OH)2/CuS) were grown on the surfaces of copper foam (CF) by combination of chemical etching and ion exchange methods, and subsequent modification with palmitic acid (PA) was performed to achieve superhydrophobic CF/Cu(OH)2/CuS-PA oil-adsorption materials. The reaction conditions of ion exchange such as the Na2S concentration and immersion time were demonstrated to be key factors to form hierarchical Cu(OH)2/CuS nanowire arrays, and thus further significantly influenced the hydrophobicity of the copper foam. Such superhydrophobic CF/Cu(OH)2/CuS-PA with a static water contact angle of 153.4° delivered a high separation efficiency of oil-water mixtures at 98.8%, and the separation efficiency was always up to 97.6% for various water-in-oil emulsions. After operating successive 30 cycles of oil-water separation, the high separation efficiency remained unchanged. The CF/Cu(OH)2/CuS-PA also presented high stability, good anti-corrosion and mechanical properties in harsh environments. Thus, this superhydrophobic copper foam offers a potentially promising three-dimensional adsorbent for practical application of spill oil recovery and oil/water separation.
KW - Copper foam
KW - CuS nanoflower
KW - Emulsion
KW - Oil/water separation
KW - Superhydrophobic
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U2 - 10.1016/j.colsurfa.2022.128249
DO - 10.1016/j.colsurfa.2022.128249
M3 - Article
AN - SCOPUS:85122229744
VL - 637
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
SN - 0927-7757
M1 - 128249
ER -