One-pot hydrothermal preparation of graphene sponge for the removal of oils and organic solvents

•Graphene sponge is prepared for hydrothermal reduction of graphene oxide with glucose.•Graphene sponge has high adsorption capacity for oils and organic solvents.•Graphene sponge could float on simulated seawater to adsorb oils.•Graphene sponge could be regenerated by evaporating or burning. Graphe...

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Bibliographic Details
Published in:Applied surface science 2016-01, Vol.362, p.56-62
Main Authors: Wu, Ruihan, Yu, Baowei, Liu, Xiaoyang, Li, Hongliang, Wang, Weixuan, Chen, Lingyun, Bai, Yitong, Ming, Zhu, Yang, Sheng-Tao
Format: Article
Language:English
Subjects:
Adsorption
Combustion
Evaporation
Glucose
Graphene
Graphene sponge
Nanotechnology
Oil
Organic solvent
Solvents
Sponges
Surface chemistry
Water treatment
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Summary:•Graphene sponge is prepared for hydrothermal reduction of graphene oxide with glucose.•Graphene sponge has high adsorption capacity for oils and organic solvents.•Graphene sponge could float on simulated seawater to adsorb oils.•Graphene sponge could be regenerated by evaporating or burning. 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.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2015.11.215