Oxygen-vacancy-rich Fe₃O₄/carbon nanosheets enabling high-attenuation and broadband microwave absorption through the integration of interfacial polarization and charge-separation polarization

Abstract

Metal-oxide/carbon composites with the remarkable dielectric-magnetic properties are promising as microwave absorption materials, but achieving high-attenuation and broadband microwave absorption properties still remains challenging. Herein, we develop a one-step carbonization...

Enhanced CO oxidation in porous metal-oxide nanoparticles derived from MOFs

“…Fig. 3b and e [39][40][41] Furthermore, the peak at 533.18 eV for Fe 3 O 4 (Fig. 3b) is the chemisorbed water (O w ) of Fe 3 O 4 .…”

Magnetic‐Dielectric Complementary Fe‐Co‐Ni Alloy/Carbon Composites for High‐Attenuation C‐Band Microwave Absorption via Carbothermal Reduction of Solid‐Solution Precursor

“…Furthermore, a comparison of the electromagnetic wave absorption performance between Fe‐Co‐Ni alloy/carbon composites in this work and other comprehensive absorbers (ferromagnetic‐metal based, [ 28,50,51 ] ferromagnetic‐alloy based, [ 13,34,52 ] ferromagnetic‐metal‐oxide based, [ 14,31 ] and dielectric‐composites based [ 8,53,54 ] ) are carried out (Figure 5f and Table S3, Supporting Information). It is encouraging that the as‐prepared FeCo 2 Ni/C, Co 7 Fe 3 /C, and FeNi 3 /C with ultra‐high electromagnetic wave absorption performance demonstrate great superiority among many electromagnetic wave absorbers that have been reported.…”

“…[11,[14][15][16][17] Among the plenty of dielectric components, such as carbon materials, [18] conductive polymers, [19] sulfide, [20] nitride, [21] carbide, [22] and MXene, [23][24] carbon materials with tremendous superiorities in abundance, density, chemical stability, and corrosion resistance are considered as the ideal dielectric substrates. [25][26][27] Based on the carbonaceous dielectric substrate, using ferromagnetic metals, [12,28] ferromagnetic alloys, [29][30] and ferrites [31,32] as magnetic components is a universal strategy to optimize magnetic parameters among magnetic-dielectric synergy absorption composites. In this context, carbonaceous magnetic composites are highly sought-after electromagnetic wave absorbing materials, due to outstanding intrinsic magnetic-dielectric properties, tunable structures, and rich adjustability of chemical composition.…”

Magnetic Composite Rapidly Treats Staphylococcus aureus‐Infected Osteomyelitis through Microwave Strengthened Thermal Effects and Reactive Oxygen Species

“…[ 21 ] However, MW catalytic capability about ferromagnetic MoS 2 composites in addition to electrocatalytic, photocatalytic, or Photo‐Fenton like catalyst performance has seldom been explored. [ 22–24 ] When used alone, either magnetic or dielectric MW thermosensitive agents do not have excellent MW absorption (MA) capabilities. However, composites of magnetic and dielectric sensitizers are promising high‐performance MTT agents with fixed dielectric and magnetic losses.…”

“…[ 18 ] Fe 3 O 4 @SiO 2 @MoS 2 exhibits MA performance due to adjustability of electromagnetic performance properties. [ 22 ] The excellent MA performance of Fe 3 O 4 @C@MoS 2 composite can be attributed to synergistic effects and multiple components effects. [ 23 ] The improved MA performance is attributed to the polarization loss, and the synergistic effect.…”