MoS2调控TiO2/C形成介电损耗主导的绣球花结构用于电磁波吸收OA

For non-magnetic metal-organic framework(MOF)derivatives,the core challenge in current research is how to overcome impedance mismatch and enhance microwave absorption performance through precise control of the material's micro-morphology and dielectric properties without introducing magnetic components.The incorporation of MoS2,a two-dimensional material with semiconductor properties and a layered structure,can significantly enhance the absorptive performance of such materials.In this work,a novel Ti-MOF derivative absorber material(TiO2/C@MoS2)with hydrangea-like morphology is proposed by in situ growing MoS2 with varying loadings on Ti-MOFs to overcome the aforementioned challenges.Specifically,the TiO2/C@MoS2 composite material TM72 achieves a minimum reflection loss(RLmin)of-62.1 dB at a thickness of 2.05 mm,a maximum effective absorption bandwidth(EABmax)of 5.88 GHz(corresponding to a thickness of 2.18 mm),and a radar cross-section(RCS)reduction of 16.6 dB m2.For TM71,the RLmin is-52.82 dB at a matching thickness of 2.47 mm,with an EABmax of 6.93 GHz corresponding to a matching thickness of 2.28 mm,and it also achieves a radar cross-section(RCS)reduction of 17.95 dB m2.This enables TiO2/C@MoS2 to fulfill the critical demands of electromagnetic wave absorbing materials(EMWAMs):"strong,broad,thin,and lightweight".Furthermore,RCS simulations validate the actual applicability of this composite material.Consequently,this effort provides an innovative strategy for constructing next-generation EMWAMs featuring ultrathin structures,outstanding absorption performance,and broadband absorption capabilities.