High-entropy Pt18Ni26Fe15Co14Cu27 nanocrystalline crystals in situ grown on reduced graphene oxide with excellent electromagnetic absorption properties
The high entropy alloy is a powerful material due to its high hardness, strength, magnetic performance, corrosion resistance, and temperature stability. Moreover, when combined with reduced graphene oxide (rGO), it formed a novel material for electromagnetic (EM) absorption. In this work, monodisperse high entropy alloy nanocrystals combined with rGO to create a new type of high entropy alloy/rGO EM absorption material. A colloidal synthesis strategy was used to prepare high entropy Pt 18 Ni 26 Fe 15 Co 14 Cu 27 nanocrystals with a small size of around 3.3 nm. These nanocrystals then in situ grew uniformly on the surface of rGO to form Pt 18 Ni 26 Fe 15 Co 14 Cu 27 /rGO nanocomposite, which were then characterized and tested for EM absorption performance. Compared to the pure high entropy Pt 18 Ni 26 Fe 15 Co 14 Cu 27 nanocrystals, the composite exhibited an improved EM absorption performance with a minimum reflection loss of −41.8 dB at 4.9 GHz and efficient EM wave absorption up to a bandwidth of 2.5 GHz in the 9.4–11.9 GHz band. This novel high entropy alloy/rGO composite has great potential to be used as an excellent material for EM wave absorption.
危险品化学品经营许可证（带存储）