TY - JOUR
T1 - Photocatalytically Driven Self-Cleaning and Underwater Superoleophobic Copper Mesh Modified with Hierarchical Bi2WO6@CuO Nanowires for Oil/Water Separation
AU - Li, Zhikai
AU - He, Huaqiang
AU - Liang, Ying
AU - Ouyang, Like
AU - Zhang, Tian C.
AU - Yuan, Shaojun
N1 - Funding Information:
The authors appreciate the financial support of the National Natural Science Foundation of China (21676169, 21978182), the measurement of SEM and XRD spectra by the Institute of New Energy and Low Carbon Technology of Sichuan University, and XPS measurement by Ceshigo Research Service (http//: www.ceshigo.com ).
Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/9/16
Y1 - 2020/9/16
N2 - Oily wastewater derived from oil spill accidents and illegal discharge of oil-related industries has brought an enormous challenge to the ecosystems and economic development. Herein, hierarchical Bi2WO6@CuO nanowire arrays (NWA) were grown on the surfaces of copper meshes by a combined process of chemical oxidation and hydrothermal deposition to introduce superwetting and self-cleaning functionality for highly efficient separation of oil/water mixtures. The resultant Bi2WO6@CuO NWA-coated copper meshes exhibited superior underwater superoleophobicity and separation ability with a water flux of around 60 kL·m-2·h-1 and oil residue in the filtrate water less than 15 ppm. Under visible-light illumination, the as-fabricated copper mesh was demonstrated to possess excellent photocatalytic oxidation ability to decompose oily contaminants to achieve self-cleaning for repeated usage. Various stability tests such as thermal resistance, salt and acid/alkali corrosion, and abrasion tests were conducted to ascertain the thermal, physiochemical, and mechanical durability and stability in practical applications. Thus, the Bi2WO6@CuO NWA-coated inorganic metal mesh is a potentially promising candidate for oily wastewater treatment owing to its high separation efficiency, visible-light-driven self-cleaning ability, and high environmental stability.
AB - Oily wastewater derived from oil spill accidents and illegal discharge of oil-related industries has brought an enormous challenge to the ecosystems and economic development. Herein, hierarchical Bi2WO6@CuO nanowire arrays (NWA) were grown on the surfaces of copper meshes by a combined process of chemical oxidation and hydrothermal deposition to introduce superwetting and self-cleaning functionality for highly efficient separation of oil/water mixtures. The resultant Bi2WO6@CuO NWA-coated copper meshes exhibited superior underwater superoleophobicity and separation ability with a water flux of around 60 kL·m-2·h-1 and oil residue in the filtrate water less than 15 ppm. Under visible-light illumination, the as-fabricated copper mesh was demonstrated to possess excellent photocatalytic oxidation ability to decompose oily contaminants to achieve self-cleaning for repeated usage. Various stability tests such as thermal resistance, salt and acid/alkali corrosion, and abrasion tests were conducted to ascertain the thermal, physiochemical, and mechanical durability and stability in practical applications. Thus, the Bi2WO6@CuO NWA-coated inorganic metal mesh is a potentially promising candidate for oily wastewater treatment owing to its high separation efficiency, visible-light-driven self-cleaning ability, and high environmental stability.
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U2 - 10.1021/acs.iecr.0c03101
DO - 10.1021/acs.iecr.0c03101
M3 - Article
AN - SCOPUS:85092313336
SN - 0888-5885
VL - 59
SP - 16450
EP - 16461
JO - Industrial and Engineering Chemistry Research
JF - Industrial and Engineering Chemistry Research
IS - 37
ER -