TY - JOUR
T1 - Superwetting and photocatalytic Ag2O/TiO2@CuC2O4 nanocomposite-coated mesh membranes for oil/water separation and soluble dye removal
AU - He, Huaqiang
AU - Zhang, Tian C.
AU - Ouyang, Like
AU - Yuan, Shaojun
N1 - Funding Information:
The authors acknowledged the financial support from the International (Regional) Joint Research Program of Department of Science and Technology of Sichuan Province (2021YFH0045) and the National Natural Science Foundation of China (21978182). The authors also thank Dr. Yingming Zhu for the measurement of XRD pattern 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 SEM imaging and DLS measurements by the Engineering Teaching Center, School of Chemical Engineering, Sichuan University, and Miss Panpan Li for the XPS analysis from Shiyanjia Lab (www.shiyanjia.com).
Funding Information:
The authors acknowledged the financial support from the International (Regional) Joint Research Program of Department of Science and Technology of Sichuan Province ( 2021YFH0045 ) and the National Natural Science Foundation of China ( 21978182 ). The authors also thank Dr. Yingming Zhu for the measurement of XRD pattern 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 SEM imaging and DLS measurements by the Engineering Teaching Center, School of Chemical Engineering, Sichuan University, and Miss Panpan Li for the XPS analysis from Shiyanjia Lab ( www.shiyanjia.com ).
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2022/3
Y1 - 2022/3
N2 - A novel oily wastewater treatment strategy of simultaneously removing insoluble oily compounds and soluble organic pollutants is highly desirable. Herein, a hierarchical Ag2O/TiO2 heterojunction-loaded CuC2O4 nanosheet-decorated copper mesh (Ag2O/TiO2@CuC2O4 CM) was rationally designed by a combination of chemical etching and solvothermal deposition methods to implement the strategy. The Ag2O/TiO2@CuC2O4 CM with hierarchical nanostructures derived from hydrophilic CuC2O4 nanosheets and belt-like Ag2O/TiO2 heterojunction was proven to exhibit superior superhydrophilicity, underwater superoleophobicity, and photocatalytic ability, which greatly improved the antipollution ability of the substrate mesh. The as-fabricated mesh with a reasonable mesh number can efficiently separate oil/water mixtures with an ultra-high flux (∼70 kL m−2 h−1) and surfactant-stabilized oil-in-water emulsions with an ultra-low residue oil content in filtrate (<60 mg L−1). More importantly, the loaded heterojunction on the CM showed a high photodegradation efficiency of about 94.1% toward soluble methylene blue and self-cleaning ability to regenerate oil-contaminated mesh within 60 min under visible light irradiation by photo-Fenton-like reaction. Besides, the favorable salt resistance, acid and alkali resistance, and stability of the CM for long-term use were also observed. Thus, this study provides a new way for the treatment of complex oily wastewater.
AB - A novel oily wastewater treatment strategy of simultaneously removing insoluble oily compounds and soluble organic pollutants is highly desirable. Herein, a hierarchical Ag2O/TiO2 heterojunction-loaded CuC2O4 nanosheet-decorated copper mesh (Ag2O/TiO2@CuC2O4 CM) was rationally designed by a combination of chemical etching and solvothermal deposition methods to implement the strategy. The Ag2O/TiO2@CuC2O4 CM with hierarchical nanostructures derived from hydrophilic CuC2O4 nanosheets and belt-like Ag2O/TiO2 heterojunction was proven to exhibit superior superhydrophilicity, underwater superoleophobicity, and photocatalytic ability, which greatly improved the antipollution ability of the substrate mesh. The as-fabricated mesh with a reasonable mesh number can efficiently separate oil/water mixtures with an ultra-high flux (∼70 kL m−2 h−1) and surfactant-stabilized oil-in-water emulsions with an ultra-low residue oil content in filtrate (<60 mg L−1). More importantly, the loaded heterojunction on the CM showed a high photodegradation efficiency of about 94.1% toward soluble methylene blue and self-cleaning ability to regenerate oil-contaminated mesh within 60 min under visible light irradiation by photo-Fenton-like reaction. Besides, the favorable salt resistance, acid and alkali resistance, and stability of the CM for long-term use were also observed. Thus, this study provides a new way for the treatment of complex oily wastewater.
KW - AgO/TiO heterojunction
KW - CuCO nanosheets
KW - Oil-in-water emulsion separation
KW - Photo-Fenton-like reaction
KW - Photodegradation
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U2 - 10.1016/j.mtchem.2021.100717
DO - 10.1016/j.mtchem.2021.100717
M3 - Article
AN - SCOPUS:85121631327
SN - 2468-5194
VL - 23
JO - Materials Today Chemistry
JF - Materials Today Chemistry
M1 - 100717
ER -