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Electromagnetic Wave Absorption Performance of Co3Fe7/Melamine Sponge Carbon Composites
Xueqin Sun1, Ningjing Zhai1, Heshan Wang1
1School of Environmental and Material Engineering, Yantai University, No. 30 Qingquan Road, Yantai 264005, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|July 3, 2025
Summary
Researchers developed lightweight, highly efficient electromagnetic wave absorbers using Co3Fe7 nanoparticles on carbonized melamine sponge. The material achieved excellent absorption (-17.03 dB) and a wide effective bandwidth (3.28 GHz), showing promise for advanced applications.
Area of Science:
- Materials Science
- Nanotechnology
- Electromagnetism
Background:
- Developing lightweight, high-performance electromagnetic wave (EMW) absorbers is crucial for modern electronic devices.
- Traditional absorbers often face limitations in weight and efficiency.
- Metal-organic frameworks (MOFs) offer tunable precursors for advanced material synthesis.
Purpose of the Study:
- To synthesize novel Co3Fe7 nanoparticles supported on a 3D hollow carbon structure derived from melamine sponge (MS).
- To investigate the tunable electromagnetic wave absorption properties of the resulting composite materials.
- To explore the relationship between material architecture, composition, and EMW absorption performance.
Main Methods:
- Hydrothermal assembly of CoFe metal-organic framework (MIL-88A) precursor onto a melamine sponge (MS).
- Calcination of the precursor to form Co3Fe7 nanoparticles on a 3D hollow sponge-derived carbon matrix (MS/Co3Fe7).
- Systematic variation of Co3Fe7 loading to optimize EMW absorption.
Main Results:
- The MS/Co3Fe7 composite successfully integrated Co3Fe7 nanoparticles onto a hollow carbon framework.
- The MS/Co3Fe7-50 composite demonstrated optimal performance with a minimum reflection loss (RL) of -17.03 dB at 13.12 GHz and a thickness of 2.60 mm.
- An effective absorption bandwidth (EAB) of 3.28 GHz was achieved within the 10.08–13.36 GHz range.
Conclusions:
- The hollow architecture, synergistic polarization and magnetic loss, and balanced electromagnetic impedance contribute to the superior EMW absorption.
- The MS/Co3Fe7 composite represents a promising lightweight and highly efficient material for EMW absorption.
- This approach offers a viable strategy for designing advanced functional materials for electromagnetic interference shielding.
