期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 751, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2020.141660
关键词
LDH; Oil-in-water emulsion separation; Underwater superoleophobicity; Photocatalytic degradation; Antibiotic
资金
- National Natural Science Foundation of China [21808019, 41772240]
- Natural Science Foundation of Jiangsu [BK20180958, BK20181048]
The NiAlFe LDH/PDA/PVDF membrane with superior wettability and hierarchical rough structure effectively separates oil-in-water emulsions and serves as a photocatalysis paper for antibiotic residue treatment with excellent photocatalytic activity and stability.
A new NiAlFe layered double hydroxide/polydopamine/polyvinylidene fluoride (NiAlFe LDH/PDA/PVDF) membrane was fabricated by in-situ growth of LDH on the PDA modified PVDF membrane. The as-prepared membrane possesses a nano/microscale rough structural surface and displays the superior wettability of superhydrophilicity in air and underwater superoleophobicity. Combining the favourable features of superwettability and hierarchical rough structure, the NiAlFe LDH/PDA/PVDF membrane could effectively separate a series of oil-in-water emulsions with high efficiency (>99%) and high permeation flux (925-1913 L m(-2)h(-1) bar(-1)). Besides, owing to the light harvest ability of NiAlFe LDH, the relevant membrane also can be applied as a photocatalysis paper for the light-driven treatment of antibiotic residue in aqueous solution. Inwhich, NiAlFe LDH/PDA/PVDF membrane can effectively degrade typical antibiotic tetracycline within 20 min under UV light irradiation, exhibiting excellent photocatalytic activity. In addition, cyclic experiments demonstrate that NiAlFe LDH/PDA/PVDF membrane has excellent stability and reusability both in oil-in-water emulsion separation and photocatalytic reaction. In general, the findings of this research demonstrate that photo-response LDH modified membranes have potential multiple applications in wastewater treatment. (C) 2020 Elsevier B.V. All rights reserved.
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