Ti3C2Tx MXene@NiFe layered double hydroxide derived multiple interfacial composites with efficient microwave absorption

High-performance microwave absorption materials are considered to be an effective solution to the in-creasing electromagnetic pollution. In this work, Ti3C2Tx MXene@NiFe-layered double hydroxide (NiFe-LDH) derived multi-interfacial FeNi3/TiN@nitrogen-doped carbon (NC)@magnetic multiwalled carbon na-notube composites were prepared by a hydrothermal process and subsequent carbothermal reduction. The phase compositions, morphology, defects and electromagnetic parameters of the composites can be regulated by the thermal treatment temperature. The reflection loss value of the composite with a thickness of only 1.6 mm can reach - 43.75 dB when the heat treatment temperature is 900 degrees C, and the effective absorption bandwidth is 5.5 GHz with a thickness of 2.12 mm when the heat treatment temperature is 700 degrees C. The synergistic effects among the associated dielectric loss, magnetic loss and the impedance matching of the samples are also systematically investigated. This work provides a new perspective and an effective approach for acquiring MXene hybrids derived high-performance microwave absorbing materials.(c) 2022 Elsevier B.V. All rights reserved.

Automated summary

In this study, Ti3C2Tx MXene@NiFe-layered double hydroxide (NiFe-LDH) derived multi-interfacial FeNi3/TiN@nitrogen-doped carbon (NC)@magnetic multiwalled carbon nanotube composites were prepared using a hydrothermal process and subsequent carbothermal reduction. The phase compositions, morphology, defects, and electromagnetic parameters of the composites can be adjusted by the thermal treatment temperature. The composites exhibit high reflection loss and effective absorption bandwidth, making them promising microwave absorption materials.