Enhancing electromagnetic wave absorption performance of Co3O4 nanoparticles functionalized MoS2 nanosheets

The 2D molybdenum disulfide nanosheets (MoS 2 -NS) has exhibited great potential in electromagnetic wave absorbing (EMA) due to larger surface area and peculiar electronic properties. However, due to the poor impedance matching and limited electromagnetic loss capability of pure MoS 2 -NS, its practical applications are significantly challenging. Herein, we firstly implanted Co 3 O 4 nanoparticles (Co 3 O 4 -NPS) on MoS 2 -NS by a facile hydrothermal method to improve the EMA performance. The resulting MoS 2 /Co 3 O 4 hybrids exhibit the minimum reflection loss (RL) value of −43.56 dB at 6.96 GHz with 20 wt% Co 3 O 4 loading under the samples thickness of 4.0 mm. The widest bandwidth with the RL value less than −10 dB of MoS 2 /Co 3 O 4 hybrids was determined to be 4.76 GHz (13.24 to 18 GHz) under the absorber thickness of 2.0 mm. The excellent performance is ascribed to that implanted Co 3 O 4 -NPS on MoS 2 -NS could turn tuning impedance matching and improving synergetic magnetic loss and dielectric loss. Herein, this work not only presents a facile strategy of achieving high-performance MoS 2 -based EMA materials, but also provides important implications for designing the other EMA materials.