Ag–Ni–Fe–P multielemental nanoparticles in situ grown on reduced graphene oxide with excellent electromagnetic absorption properties

The monodisperse Ag–Ni–Fe–P multielemental nanoparticles were synthesized using a simple colloidal synthesis strategy, with size control achieved at approximately 9 nm. Subsequently, a monodisperse Ag–Ni–Fe–P/reduced graphene oxide composite was synthesized via the hot injection method. The Ag–Ni–Fe–P multielemental nanoparticles maintained their small size and uniform dispersion on the reduced graphene oxide, without any aggregation. When compared to the solo Ag–Ni–Fe–P multielemental nanoparticles, the composite exhibited significantly improved electromagnetic absorption performance, with a reflection loss of up to − 40.03 dB at the thickness of 3 mm and an effective electromagnetic absorption bandwidth of up to 3.1 GHz. Graphical abstract