Enhanced Microwave Absorption and Surface Wave Attenuation Properties of Co0.5Ni0.5Fe2O4 Fibers/Reduced Graphene Oxide Composites

Abstract

Co0.5Ni0.5Fe2O4 fibers with a diameter of about 270 nm and a length of about 10 μm were synthesized by a microemulsion-mediated solvothermal method with subsequent heat treatment. The Co0.5Ni0.5Fe2O4 fibers/reduced graphene oxide (RGO) composite was prepared by a facile in-situ chemical reduction method. The crystalline structures and morphologies were investigated based on X-ray diffraction patterns and scanning electron microscopy. Magnetization measurements were carried out using a vibrating sample magnetometer at room temperature. Co0.5Ni0.5Fe2O4 fibers/RGO composites achieve both a wider and stronger absorption and an adjustable surface wave attenuation compared with Co0.5Ni0.5Fe2O4 fibers, indicating the potential for application as advanced microwave absorbers.

An amplified electrochemical sensor employing one-step synthesized nickel–copper–zinc ferrite/carboxymethyl cellulose/graphene oxide nanosheets composite for sensitive analysis of omeprazole

“…[51][52][53][54][55] Despite these advantages, the accumulation of graphene oxide and magnetic nanostructures reduces their efficiency. [56][57][58] Therefore, to solve this problem, these materials must be dispersed in a porous substrate. Cellulose has all the ideal properties required for sensors and biosensors due to its properties such as inertia, stability and mechanical strength.…”

Magnetic Energy Morphing, Capacitive Concept for Ni0.3Zn0.4Ca0.3Fe2O4Nanoparticles Embedded in Graphene Oxide Matrix, and Studies of Wideband Tunable Microwave Absorption

“…Despite some degree of acceptable microwave absorption performance, magnetic nanomaterials do not possess the appropriate impedance matching and a better attenuation constant. To overcome these issues, nanomaterials are incorporated into the two-dimensional (2D) GO matrix, which results in better impedance matching and in a tunable high-mobility charged carrier with increased dielectric and magnetic losses. , A wide variety of nanomaterials with GO have been investigated to improve microwave absorption by adjusting the dielectric and magnetic properties such as reduced graphene oxide (rGO)/CoFe 2 O 4 /ZnS, RGO/CoFe 2 O 4 /SnS 2 , ZnFe 2 O 4 @graphene@ TiO2, Co 0.5 Ni 0.5 Fe 2 O 4 /RGO, and MWCNT/ferrite/GO. − Hu et al observed superior performance in microwave absorption properties of 3D rGO and single-crystalline Fe 3 O 4 . Here, graphene offers a large contact surface for the homogeneous distribution of Fe 3 O 4 nanoparticles and further improves the dielectric and magnetic losses.…”

Superior Microwave Absorption Properties Derived from the Unique 3D Porous Heterogeneous Structure of a CoS@Fe3O4@rGO Aerogel

“…As the thinnest two-dimensional materials at present, graphene oxide (GO) and reduced graphene oxide (rGO) exhibit superior properties of lightweight, a large and specific surface area, good chemical stability, and mechanical performance [18][19][20]. At present, rGO has excellent performance in energy storage [21], catalysis [22], stealth technology [23], and other fields [24][25][26].…”