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MIL-101(Cr)/graphene hybrid aerogel used as a highly effective adsorbent for wastewater purification
Journal of Porous Materials ( IF 2.5 ) Pub Date : 2019-05-18 , DOI: 10.1007/s10934-019-00761-7
Pengchao Hou , Guangjian Xing , Dan Han , Yan Zhao , Gang Zhang , Hao Wang , Chang Zhao , Chunna Yu

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.



中文翻译:

MIL-101(Cr)/石墨烯混合气凝胶,用作废水净化的高效吸附剂

MIL-101(Cr)/石墨烯气凝胶(MIL-101(Cr)/ GA)使用两步合成法合成,并用作废水净化的高效吸附剂。使用XRD,FTIR和拉曼光谱,XPS和FESEM对制得的MIL-101(Cr)/ GA进行表征,以研究其结构,组成和形态。MIL-101(Cr)/ GA展示了由石墨烯片组成的3D互连大孔骨架,MIL-101(Cr)颗粒均匀地分散在该骨架上。染料,有机溶剂和油被用来评估MIL-101(Cr)的/ GA,其表现出优异的吸附能力两者阴离子甲基橙(331.5毫克克的吸附性能-1)和阳离子罗丹明B(345.7毫克克- 1个)以及各种溶剂/油自身重量的51-101倍。此外,MIL-101(Cr)/ GA表现出优异的染料回收稳定性和对溶剂/油的快速吸附速率。优异的吸附性能归因于MIL-101和石墨烯气凝胶之间的协同作用。拟二级动力学模型很好地拟合了MIL-101(Cr)/ GA的吸附动力学行为。可以预期,MIL-101(Cr)/ GA将成为一种有前途的吸附剂,用于去除污染物和净化废水。

更新日期:2019-05-18
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