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Few-layer graphene based sponge as a highly efficient, recyclable and selective sorbent for organic solvents and oils†
Er-Chieh Cho,Yu-Sheng Hsiao,Kuen-Chan Lee,Jen-Hsien Huang
RSC Advances Pub Date : 06/10/2015 00:00:00 , DOI:10.1039/C5RA06737E
Abstract

In this work, we illustrate a facile and economical strategy for the bulk production of aqueous few layer graphene (FLG) dispersions via a simple grinding method. The as-prepared FLG suspensions can be cast on various substrates through facile dip coating. The environmentally friendly one-step procedure can produce graphene-based surfaces easily without additional reduction reaction. Here, we also prepare the FLG-based sponges with both superhydrophobic and superoleophilic properties. The FLG-sponges have been demonstrated as efficient absorbents for a broad range of oils and organic chemicals with high selectivity and excellent recyclability. The FLG-sponges deliver an absorption capacity as high as 153 g g−1 for the chloroform. The results indicate that the FLG sponges may potentially be useful as next-generation oil adsorbent materials.

Graphical abstract: Few-layer graphene based sponge as a highly efficient, recyclable and selective sorbent for organic solvents and oils
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