▎ 摘　　要

Designing unique structures of magnetic particle/carbon composites with multiple heterogeneous inter-faces is an effective strategy for improving the properties of microwave absorption. Herein, hierarchical spacing arrangements for Co@carbon nanohorns and Co@graphene microspheres (Co@CNHs/G) with N enrichment were synthesized by a simple self-assembly method. As a result, Co@CNHs/G exhibited ex-cellent electromagnetic wave absorption performance, and its reflection loss (RL) values of - 44.72 dB and - 41.39 dB at the C band had thicknesses of 2.9 mm and 2.5 mm, respectively. Additionally, the maximum effective absorption bandwidth (RL