Abstract
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.
Original language | English (US) |
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Article number | 100717 |
Journal | Materials Today Chemistry |
Volume | 23 |
DOIs | |
State | Published - Mar 2022 |
Keywords
- AgO/TiO heterojunction
- CuCO nanosheets
- Oil-in-water emulsion separation
- Photo-Fenton-like reaction
- Photodegradation
ASJC Scopus subject areas
- Catalysis
- Electronic, Optical and Magnetic Materials
- Biomaterials
- Polymers and Plastics
- Colloid and Surface Chemistry
- Materials Chemistry