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SCIENCE CHINA Materials, Volume 64 , Issue 7 : 1742-1750(2021) https://doi.org/10.1007/s40843-020-1575-2

Highly structured metal-organic framework nanofibers for methane storage

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  • ReceivedAug 12, 2020
  • AcceptedNov 25, 2020
  • PublishedFeb 10, 2021

Abstract


Funded by

Grande Solution Project “HiGradeGas”(48279)

and Innovation Fund Denmark

exploring NFs based adsorbents for biogas upgrading and storage. We also thank the Danish Research Council to provide funding to support fundamental research on electrospinning(8022-00237B)

for investigating NFs structures for enzyme immobilization(6111-00232B)


Acknowledgment

This work was supported by the Grande Solution Project “HiGradeGas” (48279), and Innovation Fund Denmark, exploring NFs-based adsorbents for biogas upgrading and storage. We also thank the Danish Research Council to provide funding to support fundamental research on electrospinning (8022-00237B) and for investigating NFs structures for enzyme immobilization (6111-00232B).


Interest statement

The authors declare that they have no conflict of interest.


Contributions statement

Dou Y, Zhang W, and Kaiser A conceived the idea and prepared the manuscript; Dou Y worked on the synthesis and characterization of MOF NFs; Grande C took part in the CH4 adsorption measurement. This article was discussed with contributions from all authors.


Author information

Yibo Dou obtained his BSc and PhD degrees from Beijing University of Chemical Technology in 2009 and 2015, under the supervision of Prof. Xue Duan. Currently, he is a Researcher at the Technical University of Denmark. His main research topic is electrospinning of porous material-based functional nanofibers for energy and environmental applications.


Andreas Kaiser received his PhD degree in chemistry/materials science in 1994 at the University of Würzburg/Fraunhofer Institute for Silicate Chemistry. He is currently an Associate Professor at the Technical University of Denmark. His research interests are on the development of advanced porous materials for energy and environmental applications, including membranes, gas adsorption devices, electrocatalysis and fuel cells/electrolyzers.


Wenjing Zhang received her Master and PhD degrees at the Hong Kong University of Science and Technology. She is currently an Associate Professor and group leader at the Technical University of Denmark, focusing on advanced material design for water treatment, catalysis, fuel cells, water splitting and CO2 reduction. She is also an Honorary Distinguished Professor at Qingdao University of Science and Technology in China.


Supplement

Supplementary information

Supporting data are available in the online version of the paper.


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  • Figure 1

    Illustration of different synthesis routes for structuring HKUST-1 into MOF NFs. Method 1: DE-HKUST-1 NFs fabricated by directly electrospinning a slurry of HKUST-1 and PAN; Method 2: IG-HKUST-1 NFs fabricated by in-situ growth of HKUST-1 on the surface of NFs; Method 3: PC-HKUST-1 NFs fabricated by our new method where HKUST-1 layer is combined with the NFs.

  • Figure 2

    SEM images for (a) DE-HKUST-1 NFs, (b) IG-HKUST-1 NFs, (c) pure PAN NFs, (d) PAN/Cu(OH)2 NFs and (e) PC-HKUST-1 NFs with (f) corresponding EDX mapping.

  • Figure 3

    (a) Powder XRD patterns of PAN/Cu(OH)2 and PC-HKUST-1 NFs, respectively. (b) FTIR spectra of PAN, HKUST-1 and PC-HKUST-1 NFs, respectively.

  • Figure 4

    XPS spectra of (a) N 1s of PAN NFs and PC-HKUST-1 NFs, (b) Cu 2p of HKUST-1 powder and PC-HKUST-1 NFs, respectively.

  • Figure 5

    (a) N2 adsorption/desorption curves and (b) CH4 isothermal adsorption curves at 298 K for different NF mats: DE-HKUST-1 NFs, IG-HKUST-1 NFs and PC-HKUST-1 NFs, respectively.

  • Figure 6

    CH4 isothermal adsorption and multi-site Langmuir fitting curves for the different MOF NF composites: (a) DE-HKUST-1 NFs, (b) IG-HKUST-1 NFs, and (c) PC-HKUST-1 NFs at 298 and 313 K, respectively. (d) The comparison of CH4 uptake capacity for various NFs: DE-HKUST-1 NFs, IG-HKUST-1 NFs, PC-HKUST-1 NFs, as well as HKUST-1 powder at 3500 kPa and 298 K.

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