Engineering hierarchical heterostructure material based on metal-organic frameworks and cotton fiber for high-efficient microwave absorber

Guo, Yan, Liu, Hu, Wang, Dedong, El-Bahy, Zeinhom M., Althakafy, Jalal T., Abo-Dief, Hala M., Guo, Zhanhu, Xu, Bin, Liu, Chuntai and Shen, Changyu (2022) Engineering hierarchical heterostructure material based on metal-organic frameworks and cotton fiber for high-efficient microwave absorber. Nano Research. ISSN 1998-0124 (In Press)

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Official URL: https://doi.org/10.1007/s12274-022-4533-x

Abstract

Rational construction of hierarchical multi-component materials with abundant heterostructure is evolving as a promising strategy to achieve excellent metal-organic frameworks (MOFs) based electromagnetic wave (EMW) absorbers. Herein, hierarchical heterostructure WS2/CoS2@carbonized cotton fiber (CCF) was fabricated using the ZIF-67 MOFs nanosheets anchored cotton fiber (ZIF-67@CF) as a precursor through the tungsten etching, sulfurization, and carbonization process. Apart from the synergetic effect of dielectric-magnetic dual-loss mechanism, the hierarchical heterostructure and multicomponent of WS2/CoS2@CCF also display improved impedance matching. Furthermore, numerous W-S-Co bands and heterojunction interfaces of heterogeneous WS2/CoS2 are beneficial to promoting additional interfacial/dipole polarization loss and conductive loss, thereby enhancing the EMW attenuation performance. Based on the percolation theory, a good balance between impedance matching and EMW absorption capacity was achieved for the WS2/CoS2@CCF/paraffin composite with 20 wt.% filler loading, exhibiting strong EMW absorption capability with a minimum reflection loss (RLmin) value of −51.26 dB at 17.36 GHz with 2 mm thickness and a maximum effective absorption bandwidth (EABmax) as wide as 6.72 GHz. Our research will provide new guidance for designing high-efficient MOFs derived EMW absorbers.

Item Type: Article
Additional Information: Funding information: This work was supported by the National Natural Science Foundation of China (Nos. 51803191 and 12072325), the National Key R&D Program of China (No. 2019YFA0706802), the 111 project (No. D18023), Key Scientific and Technological Project of Henan Province (No. 202102210038), and the Deanship of Scientific Research at Umm Al-Qura University (No. 22UQU4331100DSR01).
Uncontrolled Keywords: hierarchical, heterostructure, sulfurization, metal-organic framework, microwave absorber
Subjects: F200 Materials Science
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: John Coen
Date Deposited: 10 Jun 2022 11:38
Last Modified: 10 Jun 2022 11:45
URI: http://nrl.northumbria.ac.uk/id/eprint/49291

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