Self-growing ZnFe₂O₄ on Cu₉S₅ surface for enhance multi-polarization to construct 3D flower-like composites with high-performance electromagnetic wave absorption

The development of 3D structural composites with electromagnetic wave absorption properties is a means to attenuate electromagnetic waves. Herein, magnetized flower-like Cu₉S₅/ZnFe₂O₄ composites were designed by a multi-step hydrothermal method. The results of crystallographic information, surface phase chemical information, morphological structure, magnetic and electromagnetic parameters of the composites were analyzed. The prepared Cu₉S₅/ZnFe₂O₄ composites have multiple loss paths to electromagnetic waves, composites showed an overall 3D flower-like structure. The Cu₉S₅/ZnFe₂O₄ composite achieves a minimum reflection loss of −54.38 dB and a broad effective absorption bandwidth of 5.92 GHz. By magnetization modification of the material, ZnFe₂O₄ particles are self-assembled and grown on the surface of Cu₉S₅, which is conducive to the generation of more cross-linking contact sites, the introduction of a large number of phase interfaces, crystalline defects, and special three-dimensional floral structures, and the effective introduction of magneto-electrical coupling loss effects, and the synergistic effect of the multiple loss strategies effectively improves the electromagnetic wave absorption performance of the material. This work can provide a strategic for the use of magnetization modified sulfide composite functional materials in the field of electromagnetic wave absorption.