Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Hierarchical CoxAly layered double hydroxide@carbon composites derived from metal–organic frameworks with efficient broadband electromagnetic wave absorption

Author affiliations

Abstract

Porous carbon-based composites have attracted extensive attention because of their good performance. However, designing and synthesizing porous carbon-based composites with excellent electromagnetic wave attenuation capabilities is still a great challenge. Herein, metal–organic frameworks act as good precursors, which can be used to prepare the hierarchical layered double hydroxide@carbon (LDH@C) composites using a facile three-step method. In this work, through the synergetic effects between the layered structure of the double hydroxide (LDH) and porous carbon, the hierarchical LDH@C composites achieved substantially strong electromagnetic wave absorption properties and a broad bandwidth. Furthermore, the hierarchical LDH@C composites with internal void space obtained by adjusting the Co/Al ratio can promote the multiple reflections of electromagnetic waves. As a result, the hierarchical LDH@C composites exhibit highly efficient electromagnetic wave absorption capabilities by adjusting their loading to 20 wt%. Specifically, the maximum reflection loss (RL) of the hierarchical LDH@C composites at 11.36 GHz is −64.8 dB, and the effective absorption bandwidth (RL ≤ −10 dB) of 9.0 GHz can be achieved. The results imply that the microwave absorption properties of the hierarchical LDH@C composites show a broad bandwidth and strong absorption.

Graphical abstract: Hierarchical CoxAly layered double hydroxide@carbon composites derived from metal–organic frameworks with efficient broadband electromagnetic wave absorption

Back to tab navigation

Supplementary files

Article information


Submitted
06 Feb 2020
Accepted
24 Apr 2020
First published
06 May 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Hierarchical CoxAly layered double hydroxide@carbon composites derived from metal–organic frameworks with efficient broadband electromagnetic wave absorption

B. Wen, H. Yang, L. Wang and Y. Qiu, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/D0TC00622J

Social activity

Search articles by author

Spotlight

Advertisements