With the increasing demand for microwave absorbing materials, to develop a microwave absorber with a simple synthesis process is of great significance to the field of protection. Herein we have successfully loaded iron-cobalt-nickel oxide (FeCoNiO_x) onto the as-prepared polydopamine-reduced graphene oxide (PDA-rGO) through a two-step process. The preparation method has mild reaction conditions without high temperature and pressure compared with the traditional method, which is conducive to large-scale production. Based on effectively combining dielectric loss and magnetic loss mechanism, the obtained material possesses excellent electromagnetic waves absorbing performance with the minimum RL value of −36.28 dB. The results proved that the composites can be endowed with various microwave absorption effects by the adjustion of different component ratios. In addition, the microwave absorption mechanism was dicussed in detail, and we believe that the results of our research have certain guiding significance for preparation of efficient microwave absorbers.

随着对微波吸收材料需求的增加，开发一种具有简单合成工艺的微波吸收剂对保护领域具有重要意义。在此，我们已成功加载了铁钴镍氧化物（FeCoNiO _x）通过两步法将其制备到制备的聚多巴胺还原的氧化石墨烯（PDA-rGO）上。该制备方法与传统方法相比，反应条件温和，没有高温高压，有利于大规模生产。通过有效地结合介电损耗和磁损耗机理，所获得的材料具有优异的电磁波吸收性能，最小RL值为-36.28 dB。结果证明，通过调节不同的组分比，可以赋予复合材料多种微波吸收作用。此外，还详细讨论了微波吸收机理，我们认为我们的研究结果对制备高效微波吸收剂具有一定的指导意义。