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3D‐printed hierarchical porous and superhydrophobic structure for oil absorption. a) Schematic representation of the non‐P, nano‐P, macro‐P, and macro–nano‐P cube. b) Mass‐based oil absorption capacity of the four different types of cubes toward different organic solvents. c) Photographs showing the fast absorption of soybean oil (top) and dichloromethane (bottom) by the hierarchical macro–nano‐P cube.
