Self-Assembly-Magnetized MXene Avoid Dual-Agglomeration with Enhanced Interfaces for Strong Microwave Absorption...

Area of Science:

• Materials Science
• Nanotechnology
• Electromagnetics

Background:

• Multilayered microwave absorbers require massive interfaces for enhanced electromagnetic-wave absorption.
• Avoiding agglomeration and widening the absorption band remain challenges in absorber design.

Purpose of the Study:

• To fabricate accordion-like magnetized MXene/Ni composites for improved microwave absorption.
• To investigate the mechanism behind the enhanced absorption properties and tunable bandwidth.

Main Methods:

• Electrostatic self-assembly of multilayer MXene and Ni(OH)2 nanoplates.
• In situ reduction in H2/Ar atmosphere to form MXene/Ni nanocomposites.
• Electron holography analysis to study dynamic magnetic response.

Main Results:

• Uniform distribution of Ni nanoparticles within MXene layers, preventing magnetic agglomeration.
• Achieved a maximum reflection loss of -50.5 dB at 5.5 GHz.
• Broadened absorption bandwidth up to 5.28 GHz by adjusting the MXene to Ni mass ratio.

Conclusions:

• The novel MXene/Ni composites exhibit excellent microwave absorption performance due to enhanced magnetic loss and reduced agglomeration.
• This work presents a new strategy for balancing strong absorption intensity, tunable electromagnetic properties, and wide absorption bandwidth in MXene-based materials.