Synthesis of graphene/α-Fe₂O₃ composites with excellent electromagnetic wave absorption properties

Abstract

A novel three-dimensional (3D) composite based on reduced graphene oxide (rGO)/Fe2O3 was prepared by a one-pot hydrothermal method. Fe2O3 nanoparticles were either attached on the surface of graphene sheets or coated uniformly by the graphene sheets. The resulting composite is found to self-assembly form into a 3D network via the hydrothermal treatment. Our results indicate that the as-prepared Fe2O3 nanoparticles show the porous morphology, which results in that the rGO/Fe2O3 composites exhibit excellent microwave absorbing properties in the range of 2-16 GHz and is expected to be a promising candidate as microwave absorbing materials.

Preparation of porous Fe2O3 nanorods-reduced graphene oxide nanohybrids and their excellent microwave absorption properties

“…It can be seen that the values of the obtained samples are as follows: α-FeOOH (as shown in Figure S3a ) < GO < C3 < C2 < C1. Compared to the previous results of the G-based hybrids, the as-prepared Fe based-RGO nanohybrids exhibit a relatively low values, which may lead to high impedance matching behavior and good microwave absorption 54 , 55 , 59 . Although the obtained α-FeOOH and GO exhibit much lower values of , according to the transmission line theory and previous results 48 , 60 , single material such as FeOOH, Fe 2 O 3 or GO cannot exhibit excellent microwave absorption performance.…”

Preparation and electromagnetic wave absorbing properties of 3D graphene/pine needle-like iron nano-acicular whisker composites

“…It is due to the poor magnetic loss of 3D GNs and 3D GNs/INAW composites has both dielectric loss and magnetic loss. [32][33][34] For single-layer absorber, according to the transmission theory, 35 the calculation formulas were given as follows eqn (1) and 2:…”

Crystal structures, magnetic and electrical properties of two new two-dimensional bis(2-thioxo-1, 3-dithiole-4, 5-dithiolato)nickelate salts

“…Interestingly, the salt [C 8 Apy] 2 [Ni(dmit) 2 ] 3 shows rapid, clear and stable response of photoconductivity under UV irradiation [16], and the salt [C 3 -Apy][Ni(dmit) 2 ] 3 exhibits a magnetic phase transition around 77 K with a ca. 6 K thermal hysteresis loop but absence of electrical response in the corresponding temperature interval [17].…”