A Highly Efficient Absorbent for Various Organic Solvents Using Hydrophobic Graphene-Sponge Composite
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Updated: Jan 25, 2026

Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions
Published on: July 3, 2025
Sungwoo Chun1, Kyu-Beom Kim1, Sangmin Lee1
1Department of Electronics and Computer Engineering, Hanyang University, Seoul 04763, Korea.
Abstract:
We propose a hydrophobic graphene-sponge composite produced by embedding graphene flakes within polyurethane sponge as a selective absorbent for hydrophobic liquids from a contaminated water mixture. The self-aggregation nature of graphene flakes effectively allows higher graphene content to be added inside the polyurethane sponge with repeated dip-coating. High hydrophobicity due to the intrinsic nature graphene surface allows the selective absorption of liquid contaminants from a water mixture. Given the porous structure of the composite, absorption capability of 134-233 times its own weight towards various hydrophobic liquids is possible.
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