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

Abstract

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.

Synergetic dielectric loss and magnetic loss towards superior microwave absorption through hybridization of few-layer WS2 nanosheets with NiO nanoparticles

“…Moreover, as shown in Fig. 7d, EM waves can travel long distances with multi-reflected propagation paths inside the hybrids, resulting from the special layered structures of the WS 2 nanosheets [72]. Table 1 compares the EM wave absorption characteristics of some hybrid materials containing 2D materials reported in previous work [16,17,37,39,40].…”

Architecting functionalized carbon microtube/carrollite nanocomposite demonstrating significant microwave characteristics

“…As indicated, anchoring the nanoparticles onto FCMTs amplifies the conductive loss mechanism, compared to the FCMT/PAN composite. The observed notches at permeability curves are generated from the natural and exchange resonances 82 , 103 . It is found that CuCo 2 S 4 nanoparticles and FCMT/CuCo 2 S 4 nanocomposite showed the considerable imaginary part of permeability, derived from the intrinsic features of nanoparticles.…”

“…It can be seen that FCMTs, ornamented by CuCo 2 S 4 nanoparticles, indicated the augmented relaxation loss mechanism due to the intrinsic characteristics of FCMTs, nanoparticles, and PAN, as well as, the emerged exclusive interactions at heterogeneous interfaces. Conductive loss is the key factor, boosting the imaginary part of permittivity 53 , 103 . As indicated, anchoring the nanoparticles onto FCMTs amplifies the conductive loss mechanism, compared to the FCMT/PAN composite.…”

Preparation methods for Graphene, Metal and Polymer-based Composites for EMI Shielding Materials: State of the Art of Conventional and Machine Learning Methods

“…• Nanoparticles formation is slow Hydrothermal method [41,[48][49][50][51][52][53][54][55][56] It involves substance crystallization at high temperature and pressure.…”