Ni-MOF74 derived nano nickel particle and porous carbon composites with Ni0.5Zn0.5Fe2O4 for enhancing microwave absorbing properties

Ni0.5Zn0.5Fe2O4@Ni-MOF74 composites were synthesized using sol-gel method and solvothermal method. Ni05Zn0.5Fe2O4@Ni/C porous heterogeneous composites were obtained by carbonization of Ni0.5Zn0.5Fe2O4@Ni- MOF74 in an Ar atmosphere at 600 degrees C. The generation of the porous structure and the dispersed distribution of nanoscale nickel metal are advantageous for improving the material's dielectric loss capacity. As a result, the composite material's impedance matching is optimized, and the absorption performance is improved. The content of carbon and nanoscale nickel metal can be controlled by the amount of Ni-MOF74 in the composites. At 14.18 GHz, the composite with 30% Ni-MOF74 (wt%) attained an ideal reflection loss of-49.66 dB, at a coating of 1.93 mm and an effective absorption bandwidth of 7.31 GHz, exhibiting excellent microwave absorption performance.