Issue 8, 2023

Salt-assisted pyrolysis of carbon nanosheet and carbon nanoparticle hybrids for efficient microwave absorption

Abstract

Metal–organic framework MOF-derived carbon materials are considered high potential candidates for electromagnetic wave absorbers. However, the rational design of MOF-derived microwave absorbing (MA) materials with stable structures and ultra-wide effective absorption bandwidth (EAB) is still challenging. Herein, a strategy for salt-assisted pyrolysis of MOFs is proposed to construct a 3D hybrid nanostructure comprising carbon nanoparticles and carbon nanosheets. The three-dimensional structure was adjusted by varying the type and proportion of salt, where NC-KCl exhibited the best microwave absorption performance, with an RLmin value of −40.58 dB and an EAB value of 6.24 GHz at a lower fill rate (7%). Numerical simulation results demonstrate that 3D hybrid nanostructures of nanoparticles and nanosheets outperform isolated nanoparticle structures in terms of interfacial polarization and conductivity loss. This work proposes a new strategy to provide a practical guide for optimizing the absorption properties of MOF-derived carbon MA materials.

Graphical abstract: Salt-assisted pyrolysis of carbon nanosheet and carbon nanoparticle hybrids for efficient microwave absorption

Supplementary files

Article information

Article type
Paper
Submitted
28 Sep 2022
Accepted
12 Jan 2023
First published
18 Jan 2023

J. Mater. Chem. C, 2023,11, 2941-2948

Salt-assisted pyrolysis of carbon nanosheet and carbon nanoparticle hybrids for efficient microwave absorption

W. Wang, W. Ye, X. Hou, K. Ran, Y. Huang, Z. Zhang, Y. Fang, S. Wang, R. Zhao and W. Xue, J. Mater. Chem. C, 2023, 11, 2941 DOI: 10.1039/D2TC04097B

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