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Frequent oil spills during oil transportation have become a critical global environmental and economic problem. Traditional oil-water separation technologies, including centrifugation, filtration, dissolved air flotation, oil skimmers and adsorption, have low efficiency and consume large amounts of energy during complex separation processes.
Membrane separation is a promising and economical approach to tackle energy and environmental challenges. Inspired by the anti-wetting behavior of an oil droplet on fish scales in water, researchers have developed underwater superoleophobic materials in recent years. However, some organic polymer membranes lose oil-water separation capacity at high temperature or exposure to organic solvents. Additionally, producing most inorganic membranes entails complex preparation processes.
Order - Problems - Xue - Co-workers - Jilin
In order to solve these problems, Ming Xue and co-workers from Jilin University, China, have introduced a micro/nanostructure into a MOF membrane to improve the water/oil separation efficiency. Their results are published in Science China Materials.
"We successfully constructed a ZIF-8-coated mesh membrane with excellent oil-water separation performance by simply immersing the mesh in a precursor solution at room temperature and atmospheric pressure," said Prof. Xue. "The membrane shows underwater superoleophobic properties, which is attributed to the micro and nanostructure on the surface of the...
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