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Effect of nanoporosity on the electromagnetic wave absorption performance in a biomass-templated Fe3O4/C composite: a small-angle neutron scattering study

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Abstract

A hierarchically porous Fe3O4/C composite was synthesized with a biomass-templated carbothermal strategy and tested as an electromagnetic (EM) wave absorber. The hollow fibrous structure of the cotton template was well retained in the product. The sample synthesized at 600 °C exhibited a wide effective absorption bandwidth of 4.4 GHz at a small thickness of 2.0 mm. Nitrogen sorption and small-angle neutron scattering revealed the evolution of a nanoporous structure as the synthesis temperature increased, based on which a correlation between nanoporosity and EM wave absorption performance was established. This study illustrated that porosity should be kept at a moderate level for highly efficient EM wave absorption.

Graphical abstract: Effect of nanoporosity on the electromagnetic wave absorption performance in a biomass-templated Fe3O4/C composite: a small-angle neutron scattering study

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Publication details

The article was received on 18 Aug 2019, accepted on 16 Nov 2019 and first published on 18 Nov 2019


Article type: Paper
DOI: 10.1039/C9TC04569D
J. Mater. Chem. C, 2020, Advance Article

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    Effect of nanoporosity on the electromagnetic wave absorption performance in a biomass-templated Fe3O4/C composite: a small-angle neutron scattering study

    Y. Fang, W. Xue, R. Zhao, S. Bao, W. Wang, L. Sun, L. Chen, G. Sun and B. Chen, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/C9TC04569D

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