期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 584, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2019.124000
关键词
Oil/water separation; Robust membrane; Superhydrophilicity/underwater ultralow adhesive superoleophobicity; Copper hydroxyphosphate nanosheets; Visible light photodegradation
资金
- National Natural Science Foundation of China [21978328]
- Fundamental Research Funds for the Central Universities of Central South University [2019zzts446]
With the rapid increase of oil pollution accidents, the purification of oily water has become a serious global problem to be solved. Herein, the Cu-2(OH)PO4 nanosheets-covered robust mesh membranes are fabricated by a facile green wet-chemical method at different pH conditions. By the combination of the superwetting ability with photocatalytic performance of Cu-2(OH)PO4, the nanosheets-covered mesh membrane fabricated at pH 9.7 exhibits a superhydrophilicity and underwater ultralow oil adhesive superoleophobicity for efficient removal of various oils from water with an oil sliding angle about 1.4 degrees. Simultaneously, the membrane presents a high photocatalytic activity for methylene blue under visible light irradiation. After 15 cycles of separation, the test demonstrates a superior separation stability of the membrane with high permeating flux of similar to 94,801 Lm(-2) h(-1) and separation efficiency above 99.5%. In consideration of the excellent mechanical property, chemical stability, thermal resistance and high separation capacity, the as-prepared mesh membrane is promisingly applied in purifying oily wastewater.
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