Facile synthesis and enhanced electromagnetic wave absorption of thorny-like Fe–Ni alloy/ordered mesoporous carbon composite

Facile synthesis and enhanced microwave absorption properties of anthracite-based carbon/Ni3Fe/NiO ternary composites

A low-frequency microwave absorber was synthesized by using a microwave radiation method.

Heterogeneous iron–nickel compound/RGO composites with tunable microwave absorption frequency and ultralow filler loading

Heterogeneous iron–nickel compound/reduced graphene oxide composites were fabricated to obtain lightweight and high-efficiency microwave absorption materials with tunable absorption frequency.

Economical synthesis of composites of FeNi alloy nanoparticles evenly dispersed in two-dimensional reduced graphene oxide as thin and effective electromagnetic wave absorbers

Developing electromagnetic wave absorbing materials prepared by a facile and economical way is a great challenge. Herein, we report a feasible route to synthesize a series of two-dimensional FeNi/rGO composites by a hydrothermal method followed by a carbonization process. The characterization confirms that nano-sized FeNi alloy nanoparticles are evenly supported onto graphene sheets without aggregation. The homogeneous dispersion of the nanoparticles may result from the introduction of glucose and the oxygen-containing groups on the surface of the graphene oxide. Measurements show that the microwave attenuation capability of the composites can be improved dramatically by adjusting the proportion of dielectric and magnetic components. Consequently, the two-dimensional magnetic material (FeNi/rGO-100) exhibits an excellent microwave absorption performance. In detail, the minimum reflection loss of −42.6 dB and effective bandwidth of 4.0 GHz can be reached with a thinner thickness of 1.5 mm. This study demonstrates that synergistic effects among the magnetic particles, reduced graphene oxide and amorphous carbon layers give rise to the highlighted microwave attenuation ability. Overall, the FeNi/rGO composite is a promising candidate to be used as a microwave absorber, and the feasible and economical method has shown potential application to construct multitudinous two-dimensional materials.

Two-dimensional magnetic FeNi/rGO composites with excellent microwave absorbing performance have been synthesized under the assistance of glucose.

Encapsulating metal nanoparticles inside carbon nanoflakes: a stable absorbent designed from free-standing sandwiched composites

A simple two-step method was used to achieve a stable free-standing sandwich shaped Ni/C nanoflakes absorber with higher conductive loss.

Preparation and electromagnetic wave absorption properties of FeNi3 nanoalloys generated on graphene–polyaniline nanosheets

The ternary nanocomposites of rGO–PANI–FeNi₃ were successfully synthesized by combining polymerization with hydrothermal reduction reaction.

Structure evolution of Prussian blue analogues to CoFe@C core–shell nanocomposites with good microwave absorbing performances

Novel uniform CoFe@C core–shell composite nanoparticles with good distribution have been fabricated through the combined self-assembly and controlled thermal decomposition of Co-based Prussian blue (PB) nanocubes..