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Research Article

Weakly hydrophobic nanoconfinement by graphene aerogels greatly enhances the reactivity and ambient stability of reactivity of MIL-101-Fe in Fenton-like reaction

Yuwei Zhang1Fei Liu1Zhichao Yang2Jieshu Qian1,3( )Bingcai Pan2,3
Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China
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Abstract

In the pursuit of heterogeneous catalysts with high reactivity, metal organic framework (MOF) nanomaterials have received tremendous attentions. However, many MOF catalysts especially Fe-based MOFs need to be utilized immediately after synthesis or being activated using high temperature, because of the easy loss of reactivity in humid environments resulting from the occupation of active Fe sites by water molecules. Here, we describe an inspiring strategy of growing MIL-101-Fe nanoparticles inside the three-dimensional confined space of graphene aerogel (GA), generating shapeable GA/MIL-101-Fe nanocomposite convenient for practical use. Compared to MIL-101-Fe, GA/MIL-101-Fe as catalyst demonstrates much higher reactivity in Fenton-like reaction, attributing to smaller MIL-101-Fe particle size, presence of active Fe(II) sites, and abundant defects in GA. Strikingly, the weakly hydrophobic nature of the composite greatly inhibits the loss of catalytic reactivity after being stored in humid air and accelerates the recovery of reactivity in mild temperature, by resisting the entrance of water molecules and helping to exclude water molecules. This work demonstrates that a delicate design of nanocomposite structure could not only improve the reactivity of the catalytic component, but also overcome its intrinsic drawback by taking advantage of the properties of host. We hope this functional nanoconfinement strategy could be extended to more scenarios in other fields.

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Nano Research
Pages 2383-2389
Cite this article:
Zhang Y, Liu F, Yang Z, et al. Weakly hydrophobic nanoconfinement by graphene aerogels greatly enhances the reactivity and ambient stability of reactivity of MIL-101-Fe in Fenton-like reaction. Nano Research, 2021, 14(7): 2383-2389. https://doi.org/10.1007/s12274-020-3239-1
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Received: 25 August 2020
Revised: 11 November 2020
Accepted: 13 November 2020
Published: 05 July 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020
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