Green Approach to Conductive PEDOT:PSS Decorating Magnetic-Graphene to Recover Conductivity for Highly Efficient Absorption

Graphene hybrid material is a hot topic in the fields of electromagnetic interference (EMI) shielding and microwave absorption (MA). However, hybridization reduces the conductivity of graphene resulting in the dramatical decline of MA performance. Herein, a novel two-dimensional (2D) hybrid material of PEDOT:PSS-Fe₃O₄-rGO (P-GF) was fabricated by a green approach of decorating conductive PEDOT:PSS using molecular-atomic deposition routes. The electromagnetic properties and MA performance of the hybrid materials are effectively tuned by tailoring the deposition and hybrid ratios of atoms and molecules. The MA is significantly enhanced, and the effective absorption bandwidth (BW) is widened by 140%. The maximum reflection loss reaches -61.4 dB with the maximum BW up to ∼6.4 GHz (≤10 dB). The enhanced MA performance is attributed to the deposition of conductive PEDOT:PSS which reconstructs a conductive network for the aggregation-induced charge transport as well as arises from the contribution of the introduced interface to multiple relaxation. This finding provides a reference for the future design of microwave absorbing materials, and the as-prepared P-GF has broad application prospects as a highly efficient MA material.