Few-Layered MXene Modulating In Situ Growth of Carbon Nanotubes for Enhanced Microwave Absorption

Area of Science:

• Materials Science
• Nanotechnology
• Electromagnetics

Background:

• MXene materials are crucial for microwave absorption and electromagnetic shielding.
• Pure MXene exhibits limitations in microwave absorption due to weak dielectric and magnetic loss.
• Developing advanced MXene composites is essential for managing electromagnetic pollution.

Purpose of the Study:

• To develop a novel MXene-based composite with improved microwave absorption capabilities.
• To investigate the synergistic effects of CNTs and MXene for enhanced electromagnetic performance.
• To explore a new strategy for fabricating advanced microwave absorbing materials.

Main Methods:

• Catalytic growth of carbon nanotubes (CNTs) on MXene using electrophoretic deposition of metal ions.
• In situ regulation of CNTs' growth for a layer-by-layer composite structure.
• Preparation of Nickel-decorated multi-walled CNTs/Ti3C2Tx (Ni-MWCNTs/Ti3C2Tx) composites.

Main Results:

• The Ni-MWCNTs/Ti3C2Tx composite demonstrated a significantly improved "layer-by-layer" structure.
• Optimized dielectric-magnetic synergy enhanced impedance matching for better microwave absorption.
• The 2-Ni-MWCNTs/Ti3C2Tx composite achieved a reflection loss of -44.08 dB with a 1.52 GHz bandwidth at 2.49 mm thickness.

Conclusions:

• The developed composite material offers superior microwave absorption performance compared to pure MXene.
• The strategy of in situ CNT growth provides a new pathway for designing advanced MXene-based absorbers.
• This research opens new avenues for few-layered MXene composites in electromagnetic applications.