Confinedly growing and tailoring of Co 3 O 4 clusters-WS 2 nanosheets for highly efficient microwave absorption

Abstract Electromagnetic (EM) wave absorbing materials have been a research hotspot in materials science and related technical fields in recent years. Finding lightweight, efficient, and broadband electromagnetic wave absorbing materials has always been a very challenging subject. Herein, we successfully prepared Co 3 O 4 -WS 2 hybrid nanosheets with heterostructures, which excellent combine the advantages of magnetic property of Co 3 O 4 and dielectric property of WS 2 . By the electromagnetic synergy effect, maximum RL is up to −61.1 dB at 1.9 mm, and the bandwidth exceeds 5 GHz. Such highly efficient microwave absorption is attributed to not only the electromagnetic synergy effect, but the dipole polarization as well as conduction loss. These results show that the obtained Co 3 O 4 -WS 2 is an excellent EM wave absorbing material and can be used as a candidate for advanced EM wave absorbing materials in the fields such as commerce, military and aerospace in future.