Facile synthesis RGO/MnOx composite aerogel as high-efficient electromagnetic wave absorbents

We report a facial and green method to synthesis 3D interconnected hybrid aerogels with MnOx nanowires anchoring on reduced graphene oxide nanosheets (RGO/MnOx ). After freeze drying, the corresponding composite aerogels show the properties of low density and excellent electromagnetic wave absorption. Importantly, their microwave absorption properties are controlled by the dispersion amount of pre-synthesized MnOx nanowires in GO suspensions. A typical sample exhibits a minimum reflection loss value of -56.21 dB when the thickness is 3.44 mm. The corresponding bandwidth below -10 dB (90% of EM wave absorption) is up to 12.96 GHz (5.04 GHz-18 GHz) in the thickness range of 2 mm-5 mm. Therefore, the synthesized RGO/MnOx composite aerogel has a very promising application prospect in lightweight and high-efficient electromagnetic wave absorbents. (C) 2018 Elsevier B.V. All rights reserved.