Facile synthesis of Co/SC microwave absorbents by recycling coal hydrogasification residue

A coal hydrogasification residue, semi-coke (SC), was recycled to prepare SC-based composites for microwave absorption by a facile method. This mainly involved loading an ethanol solution of cobalt nitrate onto SC and then conducting in-situ carbothermal reduction. The results showed that, a Co/SC composite could be obtained at a carbothermal temperature of 700 ℃ (denoted by CoSC700). The CoSC700 composite exhibited excellent performance with a...