Abstract
The present work describes the fabrication of superhydrophobic and superoleophilic reduced graphene oxide coated melamine formaldehyde (rGO@MF) based sponge for efficient removal of oils and organic solvents from oil–water mixture. The rGO@MF sponge was synthesized using commercially available melamine sponge, GO solution, and hydrazine hydrate by hydrothermal treatment. Phase and microstructural analysis show that as-synthesized rGO@MF possesses ultrathin coating of rGO sheets onto porous MF sponge. Moreover, as-prepared rGO@MF sponge exhibited contact angle (CA) ~ 162° and 0° on a sessile water and oil droplet, respectively. Oil water separation test shows that rGO@MF sponge can remove ~ 90–120 times oils by its weight. Moreover, repeated sorption—mechanical squeezing test of oil–water mixture sheds light that rGO@MF sponge is fully reusable and ~ 40–50% oil can be recovered after 10 cycles.
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Authors gratefully acknowledge the partial financial support from Department of Science and Technology, Science and Engineering Research Board (DST-SERB) (Grant Number ECR/2016/000959).
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Saha, P., Dashairya, L. Reduced graphene oxide modified melamine formaldehyde (rGO@MF) superhydrophobic sponge for efficient oil–water separation. J Porous Mater 25, 1475–1488 (2018). https://doi.org/10.1007/s10934-018-0560-0
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DOI: https://doi.org/10.1007/s10934-018-0560-0