Preparation of nanoporous graphene oxide by nanocrystal-masked etching

Toward a nacremimetic metal–organic framework molecular sieving membrane

Yaoxin Hu, Yueqin Wu, Citsabehsan Devendran, Jing Wei, Yan Liang, Masahiko Matsukata, Wei Shen, Adrian Neild, Han Huang, Huanting Wang

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Ultrathin and robust metal–organic framework (MOF) molecular sieving membranes with high-flux and high-selectivity have shown great potential for low-energy gas separation. Here we report a controllable MOF nanocrystal-masked plasma etching method for forming evenly distributed mesopores on graphene oxide (GO) nanosheets. The resulting mesoporous GO/MOF nanosheets are used to synthesize an ultrathin polycrystalline MOF membrane with well-aligned mesoporous GO (MGO) nanosheets via a nacre-mimetic “assembly-and-intergrowth” approach. This is achieved by assembling the twodimensional (2D) porous materials (e.g. hybrid MOF/MGO nanosheets) into a laminate scaffold matrix, followed by the intergrowth of MOF crystals into this matrix. Such an approach enables the realization of homogeneous dispersion and alignment, strong interfacial binding, and interpenetration of porous GO nanosheets within the ultrathin MOF polycrystalline layer. In particular, this layered MOF/MGO membrane displays the improvement of the homogeneity in mechanical deformation and fracture resistance as compared to the polycrystalline MOF membrane, as shown by nanoindentation tests. In addition, the obtained MOF membrane with an ultrathin thickness of 430 nm shows excellent hydrogen separation performance (H2/C3H8 selectivity as high as 2409 with H2 permeances of 1.17 106 mol m-2 s-1 Pa-1). Such a simple etching and bioinspired growth strategy could be potentially employed to produce other nanoporous 2D materials and nacre-mimetic polycrystalline films with unique properties for a range of advanced separation applications.
Original languageEnglish
Pages (from-to)16255-16262
Number of pages8
JournalJournal of Materials Chemistry A
Volume5
Issue number31
DOIs
Publication statusPublished - 2017

Cite this

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title = "Preparation of nanoporous graphene oxide by nanocrystal-masked etching: Toward a nacremimetic metal–organic framework molecular sieving membrane",
abstract = "Ultrathin and robust metal–organic framework (MOF) molecular sieving membranes with high-flux and high-selectivity have shown great potential for low-energy gas separation. Here we report a controllable MOF nanocrystal-masked plasma etching method for forming evenly distributed mesopores on graphene oxide (GO) nanosheets. The resulting mesoporous GO/MOF nanosheets are used to synthesize an ultrathin polycrystalline MOF membrane with well-aligned mesoporous GO (MGO) nanosheets via a nacre-mimetic “assembly-and-intergrowth” approach. This is achieved by assembling the twodimensional (2D) porous materials (e.g. hybrid MOF/MGO nanosheets) into a laminate scaffold matrix, followed by the intergrowth of MOF crystals into this matrix. Such an approach enables the realization of homogeneous dispersion and alignment, strong interfacial binding, and interpenetration of porous GO nanosheets within the ultrathin MOF polycrystalline layer. In particular, this layered MOF/MGO membrane displays the improvement of the homogeneity in mechanical deformation and fracture resistance as compared to the polycrystalline MOF membrane, as shown by nanoindentation tests. In addition, the obtained MOF membrane with an ultrathin thickness of 430 nm shows excellent hydrogen separation performance (H2/C3H8 selectivity as high as 2409 with H2 permeances of 1.17 106 mol m-2 s-1 Pa-1). Such a simple etching and bioinspired growth strategy could be potentially employed to produce other nanoporous 2D materials and nacre-mimetic polycrystalline films with unique properties for a range of advanced separation applications.",
author = "Yaoxin Hu and Yueqin Wu and Citsabehsan Devendran and Jing Wei and Yan Liang and Masahiko Matsukata and Wei Shen and Adrian Neild and Han Huang and Huanting Wang",
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language = "English",
volume = "5",
pages = "16255--16262",
journal = "Journal of Materials Chemistry A",
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publisher = "The Royal Society of Chemistry",
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Preparation of nanoporous graphene oxide by nanocrystal-masked etching : Toward a nacremimetic metal–organic framework molecular sieving membrane. / Hu, Yaoxin; Wu, Yueqin; Devendran, Citsabehsan; Wei, Jing; Liang, Yan; Matsukata, Masahiko; Shen, Wei; Neild, Adrian; Huang, Han; Wang, Huanting.

In: Journal of Materials Chemistry A, Vol. 5, No. 31, 2017, p. 16255-16262.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Preparation of nanoporous graphene oxide by nanocrystal-masked etching

T2 - Toward a nacremimetic metal–organic framework molecular sieving membrane

AU - Hu, Yaoxin

AU - Wu, Yueqin

AU - Devendran, Citsabehsan

AU - Wei, Jing

AU - Liang, Yan

AU - Matsukata, Masahiko

AU - Shen, Wei

AU - Neild, Adrian

AU - Huang, Han

AU - Wang, Huanting

PY - 2017

Y1 - 2017

N2 - Ultrathin and robust metal–organic framework (MOF) molecular sieving membranes with high-flux and high-selectivity have shown great potential for low-energy gas separation. Here we report a controllable MOF nanocrystal-masked plasma etching method for forming evenly distributed mesopores on graphene oxide (GO) nanosheets. The resulting mesoporous GO/MOF nanosheets are used to synthesize an ultrathin polycrystalline MOF membrane with well-aligned mesoporous GO (MGO) nanosheets via a nacre-mimetic “assembly-and-intergrowth” approach. This is achieved by assembling the twodimensional (2D) porous materials (e.g. hybrid MOF/MGO nanosheets) into a laminate scaffold matrix, followed by the intergrowth of MOF crystals into this matrix. Such an approach enables the realization of homogeneous dispersion and alignment, strong interfacial binding, and interpenetration of porous GO nanosheets within the ultrathin MOF polycrystalline layer. In particular, this layered MOF/MGO membrane displays the improvement of the homogeneity in mechanical deformation and fracture resistance as compared to the polycrystalline MOF membrane, as shown by nanoindentation tests. In addition, the obtained MOF membrane with an ultrathin thickness of 430 nm shows excellent hydrogen separation performance (H2/C3H8 selectivity as high as 2409 with H2 permeances of 1.17 106 mol m-2 s-1 Pa-1). Such a simple etching and bioinspired growth strategy could be potentially employed to produce other nanoporous 2D materials and nacre-mimetic polycrystalline films with unique properties for a range of advanced separation applications.

AB - Ultrathin and robust metal–organic framework (MOF) molecular sieving membranes with high-flux and high-selectivity have shown great potential for low-energy gas separation. Here we report a controllable MOF nanocrystal-masked plasma etching method for forming evenly distributed mesopores on graphene oxide (GO) nanosheets. The resulting mesoporous GO/MOF nanosheets are used to synthesize an ultrathin polycrystalline MOF membrane with well-aligned mesoporous GO (MGO) nanosheets via a nacre-mimetic “assembly-and-intergrowth” approach. This is achieved by assembling the twodimensional (2D) porous materials (e.g. hybrid MOF/MGO nanosheets) into a laminate scaffold matrix, followed by the intergrowth of MOF crystals into this matrix. Such an approach enables the realization of homogeneous dispersion and alignment, strong interfacial binding, and interpenetration of porous GO nanosheets within the ultrathin MOF polycrystalline layer. In particular, this layered MOF/MGO membrane displays the improvement of the homogeneity in mechanical deformation and fracture resistance as compared to the polycrystalline MOF membrane, as shown by nanoindentation tests. In addition, the obtained MOF membrane with an ultrathin thickness of 430 nm shows excellent hydrogen separation performance (H2/C3H8 selectivity as high as 2409 with H2 permeances of 1.17 106 mol m-2 s-1 Pa-1). Such a simple etching and bioinspired growth strategy could be potentially employed to produce other nanoporous 2D materials and nacre-mimetic polycrystalline films with unique properties for a range of advanced separation applications.

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U2 - 10.1039/c7ta00927e

DO - 10.1039/c7ta00927e

M3 - Article

VL - 5

SP - 16255

EP - 16262

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

SN - 2050-7488

IS - 31

ER -