Alkalized chemical scissors form honeycomb MXene for enhanced microwave absorption performance

The optimization of electromagnetic wave (EMW) absorption performance in MXene-based absorbers can be effectively achieved through structural engineering and component design. Herein, the chemical shear effect of various alkaline solutions applied to MXene is significantly reflected in the electromagnetic wave absorption properties. Furthermore, the incorporation of metal-organic frameworks (MOFs) enhances the synergistic microwave absorption performance of the composite material. The alkalization treatment induces a 'shear effect' on MXene, resulting in the formation of a honeycomb single-layer microstructure on its surface. Additionally, the chemical deposition reaction facilitates the deposition of ZIF-67 onto the alkalized MXene. The resulting MOF-derived carbon adsorbent exhibits pronounced magnetic loss and dielectric loss characteristics. Notably, the NMXene/CNTs/Co (NMCC-70) composites exhibit exceptional EMW absorption performance following NH 3 ·H 2 O alkalinization treatment, with a minimum reflection loss (RL min ) of −66.5 dB and an effective absorption bandwidth (EAB) of 4.5 GHz. The intricate porous structure of alkalized MXene, combined with the synergistic effects of ZIF-67, renders its derivatives particularly promising for applications in electromagnetic wave absorption.