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Graphene based porous magnetic aerogel powder for removal of
methylene blue from waste water

Journal of Environment & Biotechnology Research, Vol. 6, No. 1, Pages 146-150, January 2017

Rahul Sharma, R.K. Kotnala, Parveen Saini

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ABSTRACT

Graphene based porous magnetic aerogel powder (MAP) has been prepared by facile and scalable route involving
hydrothermal treatment of graphene oxide (GO) dispersion containing magnetite (Fe3O4) nanoparticles followed by
freeze drying. The formed MAP is demonstrated as an efficient adsorbent material for methylene blue (MB) dyes
present in water as a deliberately added impurity. The presence of Fe3O4 phase checks the agglomerating
tendency of in-situ reduced GO (RGO) layers, simultaneously imparting magnetic character. The high porosity of
MAP allowed rapid adsorption of MB molecules from water whereas coupled magnetic character enabled easy
magnetic separation of dye sorbed MAP particles from purified water. The system was found to rapidly (in 30 s)
decolorize the MB containing water with instantaneous adsorption capacity of 130 mg/g. The adsorption
mechanism involves ultrafast electrostatic interactions between cationic dye molecules and electron density rich
oxygen functional groups present on MAP surfaces.
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Journal of Environment and Biotechnology Research
Volume 6, Number 1, 2017, pp. 146-150
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