期刊
APPLIED SURFACE SCIENCE
卷 476, 期 -, 页码 61-69出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2019.01.064
关键词
Metal-organic frameworks; Electrospun; Superhydrophilicity; Antifouling; Oil-water separation
类别
资金
- Open Project Program of State Key Laboratory of Petroleum Pollution Control [PPC2017007]
- CNPC Research Institute of Safety and Environmental Technology
- Key Research and Development Program of Shandong Province [2018GGX102012]
- Graduate Innovation Fund of China University of Petroleum [YCX2018072]
A nanofibrous polyacrylonitrile membrane decorated with metal-organic frameworks (MOFs) of UiO-66-NH2 is prepared via a simple and flexible self-assemble method. It is found that the membrane shows high-efficiency separation performance of oil-water emulsions, due to the hydrophilic carboxyl and amino groups of UiO-66-NH2 and the gaps between neighboring UiO-66-NH2. Remarkably, solely driven by gravity (similar to 0.01 bar), the obtained membrane can effectively separate oil-water emulsions with an excellent separation efficiency ( > 99%, TOC < 10 mg/L) and a high flux (2107 Lm(-2) h(-1)). It is demonstrated that the hydrophilic carboxyl and amino groups of UiO-66-NH2 enhance the superhydrophilicity and underwater superoleophobicity of the membrane so as to greatly improve the antifouling properties of the membrane. Besides, because the size of gaps between neighboring UiO-66-NH2 is mostly much smaller than that of oil drops and the UiO-66-NH2 are underwater oleophobic, the oil drops hardly enter the gaps between neighboring UiO-66-NH2 so that the gaps provide much more water flow tunnels, which obviously enhance the flux of the membrane. In this study, we present a new avenue of building MOFs loaded nanofibrous membrane with excellent oil-water separation performance.
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