MIL-101(Cr)/graphene hybrid aerogel used as a highly effective adsorbent for wastewater purification


MIL-101(Cr)/graphene aerogel (MIL-101(Cr)/GA) was synthesized using a two-step synthesis and used as a high efficient adsorbent for wastewater purification. The as-prepared MIL-101(Cr)/GA was characterized using XRD, FTIR and Raman spectroscopy, XPS and FESEM to investigate its structure, composition and morphology. MIL-101(Cr)/GA exhibited a 3D interconnected macroporous framework comprised of graphene sheets, on which MIL-101(Cr) particles were dispersed uniformly. Dyes, organic solvents and oils were used to evaluate the adsorption performance of MIL-101(Cr)/GA, which exhibited an excellent adsorption capacity for both anionic methyl orange (331.5 mg g−1) and cationic rhodamine B (345.7 mg g−1) as well as 51–101 times its own weight of various solvents/oils. In addition, the MIL-101(Cr)/GA showed superior recycling stability for dyes and a rapid adsorption rate for solvents/oils. The excellent adsorption performance was attributed to a synergistic effect between MIL-101 and the graphene aerogel. The kinetic behavior for adsorption observed for MIL-101(Cr)/GA was well-fitted by a pseudo-second-order kinetic model. It is envisaged that MIL-101(Cr)/GA will be a promising adsorbent for the removal of pollutants and wastewater purification.

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This work was supported by the Nation Natural Science Foundation of China (NSFC, Grant No. 21501012), the Scientific Research Project of Beijing Educational Committee (No. KM201710017007), and the Institute of nano-photoelectronics and high energy physics.

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Correspondence to Guangjian Xing.

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Hou, P., Xing, G., Han, D. et al. MIL-101(Cr)/graphene hybrid aerogel used as a highly effective adsorbent for wastewater purification. J Porous Mater 26, 1607–1618 (2019).

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  • Graphene
  • Hybrid
  • Aerogel
  • Adsorption