Enhanced microwave absorption property of reduced graphene oxide (RGO)-MnFe2O4 nanocomposites and polyvinylidene fluoride.

MnFe2O4 nanoparticles have been synthesized on a large scale by a simple hydrothermal process in a wild condition, and the RGO/MnFe2O4 nanocomposites were also prepared under ultrasonic treatment based on the synthesized nanoparticles. The absorption properties of MnFe2O4/wax, RGO/MnFe2O4/wax and the RGO/MnFe2O4/PVDF (polyvinylidene fluoride) composites were studied; the results indicated that the RGO/MnFe2O4/PVDF composites show the most excellent wave absorption properties. The minimum reflection loss of RGO/MnFe2O4/PVDF composites with filler content of 5 wt % can reach -29.

Fabrication of Reduced Graphene Oxide (RGO)/Co O Nanohybrid Particles and a RGO/Co O /Poly(vinylidene fluoride) Composite with Enhanced Wave-Absorption Properties.

Reduced graphene oxide (RGO)/Co O nanohybrid particles, composed of reduced graphite oxide and Co O particles, have been fabricated by an in situ growth method under mild wet-chemical conditions (140 °C). A series of characterization results indicate that the as-prepared Co O particles with relatively uniform sizes are embedded in RGO layers to form unique core-shell nanostructures. The RGO/Co O /poly(vinylidene fluoride) composite was found to possess excellent absorption properties.

Facile Size-Controllable Synthesis of Colorful Quasi-Cubic α-Fe O Materials from Nanoscale to Microscale and Their Properties Related to the Size Effect.

A facile and environmentally friendly hydrothermal approach has been employed to synthesize size-controllable quasi-cubic α-Fe O nanocrystals by using an aqueous solution of FeCl without any alkaline materials and stabilizing agent. The as-prepared products were carefully characterized and the growth mechanism is also discussed. This hydrothermal synthesis of such quasi-cubic structures implies a simple and low-cost route to prepare monodisperse nanomaterials on a large scale.