Journal
APPLIED SURFACE SCIENCE
Volume 362, Issue -, Pages 56-62Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.11.215
Keywords
Graphene sponge; Adsorption; Oil; Organic solvent; Water treatment; Nanotechnology
Categories
Funding
- Science and Technology Department of Sichuan Province [2013FZ0060]
- China Natural Science Foundation [201307101]
- Innovation Scientific Research Program for Graduates in Southwest University for Nationalities [CX2016SZ024]
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Graphene sponge (GS) has found applications in oil removal due to the hydrophobic nature of graphene sheets. Current hydrothermal preparations of GS use toxic reducing reagents, which might cause environmental pollution. In this study, we reported that graphene oxide (GO) could be hydrothermally reduced by glucose to form GS for the adsorption of oils and various organic solvents. Graphene sheets were reduced by glucose during the hydrothermal treatment and formed 3D porous structure. GS efficiently adsorbed organic solvents and oils with competitive adsorption capacities. GS was able to treat pollutants in pure liquid form and also in the simulated seawater. GS could be easily regenerated by evaporating or burning. After 10 cycles, the adsorption capacity still retained 77% by evaporating and 87% by burning. The implication to the applications of GS in water remediation is discussed. (C) 2015 Elsevier B.V. All rights reserved.
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