期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 608, 期 -, 页码 1960-1972出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.10.162
关键词
Underwater superoleophobic; Porous; Photo-Fenton; Self-cleaning; Anti-fouling; Oil/water separation
资金
- Fonds de recherche du Quebec - Nature et technologies (FRQNT)
- Natural Sciences and Engi-neering Research Council (NSERC) of Canada
In this study, a PVP-coated porous PKCN membrane was fabricated for the first time by vacuum filtration, demonstrating enhanced hydrophilicity and underwater superoleophobicity. The membrane's permeability increased significantly after sonication treatment, while the PKCN membrane exhibited fast and excellent flux recovery after the photo-Fenton cleaning process. This work sheds light on the development of self-cleaning membranes with superior anti-fouling ability for effective oil/water separation.
Due to the great fouling resistance property, (super)hydrophilic/underwater superoleophobic membranes are prevalent candidates for oil-polluted wastewater treatment. Even so, membrane fouling inevitably occurs during long-term operation. Therefore, it is of great significance to construct anti-fouling membranes with robust flux recovery. Herein, a polyvinyl pyrrolidone (PVP) coated porous potassium-doped g-C3N4 (PKCN) membrane was fabricated for the first time by vacuum filtration. The as-prepared membrane displays enhanced hydrophilicity and underwater superoleophobicity. The permeability of the membrane increased significantly after sonication treatment, which is attributed to the increased pore volume and small nanosheets size that shorten the transport pathway of water molecules. Importantly, owing to the high photo-Fenton activity, the PKCN membrane exhibits fast (within 15 min) and excellent flux recovery (96.5%) after the photo-Fenton cleaning process. Furthermore, after 10 repeated usages, the PKCN membrane still keeps stable permeability and excellent purification efficiency. This work opens a door for developing self-cleaning membranes with the superior anti-fouling ability for effective oil/water separation. (C) 2021 Elsevier Inc. All rights reserved.
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