Abstract
Three-dimensional (3D) CuO coated foam with superhydrophobic and superoleophilic property has been successfully fabricated via a simple solution-immersion process. Based on a design of box, the 3D superhydrophobic Cu foam can separate all kinds of oils regardless of the heavy oil or light oil in the mixture with the separation efficiency up to 97%, the advantage of which the other 2D superhydrophobic oil filtration material did not possess. In addition, the box manufactured superhydrophobic and superoleophilic CuO coated foam could continuously capture and remove the oil from water surfaces under a continuous vacuum regime. When vacuum degree was 30 kPa, the separation velocity can be 5mLs−1, showing a high-speed separation process.
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