Metal–organic framework-based Fe/C@Co3O4 core–shell nanocomposites with outstanding microwave absorption properties in low frequencies

Microwave absorption materials are of great importance in various application nowadays. In this article, a new type of metal–organic framework (MOF)-based Fe/C@Co 3 O 4 core–shell nanocomposites is introduced for microwave absorption coating applications, via a simple and low-cost fabrication process. The nanocomposites have been successfully synthesized via a controlled high-temperature treatment of a PB@Co(OH) 2 precursor, which was prepared earlier by a solvent-thermal method. The nanocomposites have excellent microwave absorption properties, and the maximum reflection loss (RL) value and effective bandwidth (RL