Two-dimensional Multilayer MnFe2O4/MXene Composites with Excellent Electromagnetic Wave Absorption Effect

The study of building materials with electromagnetic wave absorbing properties to minimize electromagnetic wave interference and enhance communication and efficiency while ensuring a cleaner, healthier, and sustainable future has gained significant attention. The traditional MnFe2O4 material, known for its strong magnetic loss, has been widely used in the field of absorbing electromagnetic waves. However, its lower dielectric loss has hindered further development in this area.In this study, we aimed to design two-dimensional multilayer MnFe2O4/MXene composites using a hydrothermal method to enhance electromagnetic wave absorption. By reducing the particle size, we were able to increase the electromagnetic wave absorption capability of MnFe2O4. The pure MnFe2O4 material achieved a minimum reflection loss (RLmin) value of -40.5 dB at a thickness of 2.85 mm when the hydrothermal temperature was set at 110 °C.To further enhance the dielectric loss of MnFe2O4, we introduced high-surface-area MXene into the composite. The optimal RLmin value of the MnFe2O4/MXene composites reached -49.5 dB at a thickness of 3.55 mm, surpassing the performance of individual MnFe2O4 and MXene materials. This enhanced attenuation of electromagnetic wave absorption can be attributed to the coupling effect between MnFe2O4 and MXene, which promotes coupling mechanisms, interface polarization, and impedance matching.