Ultrathin thickness ( 3.5 GHz. The investigation of the absorption mechanism revealed that moderate dielectric loss, magnetic loss, good impedance matching and the porous structure contributed to the high microwave absorption. This work opens up a potential strategy to prepare excellent microwave absorbents with ultrathin thickness and ultralow density.

Ultralight CoNi/rGO aerogels toward excellent microwave absorption at ultrathin thickness

Lightweight Ni Foam-Based Ultra-Broadband Electromagnetic Wave Absorber

Magnetic Ni/graphene connected with conductive carbon nano-onions or nanotubes by atomic layer deposition for lightweight and low-frequency microwave absorption

Solar-to-chemical energy conversion via heterogeneous photocatalysis is one of the sustainable approaches to tackle the growing environmental and energy challenges. Among various promising photocatalytic materials, plasmonic-driven photocatalysts feature prominent solar-driven surface plasmon resonance (SPR). Non-noble plasmonic metals (NNPMs)-based photocatalysts have been identified as a unique alternative to noble metal-based ones due to their advantages like earth-abundance, cost-effectiveness, and large-scale application capability. This review comprehensively summarizes the most recent advances in the synthesis, characterization, and properties of NNPMs-based photocatalysts. After introducing the fundamental principles of SPR, the attributes and functionalities of NNPMs in governing surface/interfacial photocatalytic processes are presented. Next, the utilization of NNPMs-based photocatalytic materials for the removal of pollutants, water splitting, CO2 reduction, and organic transformations is discussed. The review concludes with current challenges and perspectives in advancing the NNPMs-based photocatalysts, which are timely and important to plasmon-based photocatalysis, a truly interdisciplinary field across materials science, chemistry, and physics.

Non-Noble Plasmonic Metal-Based Photocatalysts.

Eco-mimetic nanoarchitecture for green EMI shielding

Co/C/Fe/C Hierarchical Flowers with Strawberry-like Surface as Surface Plasmon for Enhanced Permittivity, Permeability, and Microwave Absorption Properties

Tailoring impedance match and enhancing microwave absorption of Fe3O4/Bi24Fe2O39/Bi hollow porous microrods by controlling their composition

The invention provides a magnetic alloy hollow microsphere and a preparation method thereof. The components of the microsphere comprise cobalt and nickel. The structural formula of the microsphere isshown as Capable of Ni , wherein x is greater than or equal to 0.14 and less than or equal to 1. The microsphere is of a hollow structure and has the diameter being 0.32-3.35 microns, the wall thickness being 4-370 nm and the saturation magnetization intensity being 80.4-152.89 emu.g . The microsphere is prepared through a mixed solvent high-temperature liquid phase reduction method. Thepreparation method comprises the steps of adding an organic solvent, water and a surface active agent into three flasks in proportion to be stirred for 10 min; adding metal salt to be subjected to electric stirring for 2 h, and dropwise adding a reducing agent to be subjected to electric stirring for 1 h; conducting reflux condensation at 170-197 DEG C for 3-4 h, and conducting repeated magnetic separating and washing through ethanol after cooling; and finally, conducting drying to obtain the required magnetic alloy hollow microsphere. The magnetic alloy hollow microsphere is made of a raw material which is low in price and easy to get. The magnetic alloy hollow microsphere is low in cost, simple in process, high in efficiency and easy to popularize. A magnetic ball chain has the properties of size and composition adjustability and can be applied to magneto-rheological, magnetic separation, catalytic and electrode materials and microwave absorption or high-density magnetic recording materials.

Magnetic alloy hollow microsphere and preparation method thereof

The invention relates to a monodisperse ferrite micro-nano sheet and a preparation method thereof The transition metal element doped ferrite or ferric oxide is used as the component of the micro-nano sheet; a bismuth doped ferrite micro-nano sheet is of normal square shape, the side length thereof is 026-185mu m, the thickness is 20-240nm and the percent of the bismuth doped atoms is 0-142%; and a barium or strontium doped ferric oxide micro-nano sheet is of circular shape, the diameter is 148mu m-1832mu m, the thickness is 016-354mu m and the percent of barium or strontium doped atoms is 033% A coprecipitation-hydrothermal method is adopted for preparing the micro-nano sheet; the composition, shape and size of the particles can be regulated and controlled in the manner of adjusting the proportion of the transition metal salt; the method has the characteristics of low-cost easily acquired raw materials, low cost, simple process, low requirement for equipment, high efficiency and easiness in popularization; and the magnetic microchip has the characteristics of high monodispersity and uniformity, adjustable morphology and composition, and the like, and has wide application prospect in catalyst, electrode materials, pigments, microwave absorption or high-density magnetic recording materials

Monodisperse ferrite micro-nano sheet and preparation method thereof

The invention relates to a bimetallic cobalt-based core-shell material and a preparation method and application thereof. A core of the bimetallic cobalt-based core-shell material is a magnetic metal Co, and a shell of the bimetallic cobalt-based core-shell material is a non-magnetic metal Ag or Cu; a shape of the bimetallic cobalt-based core-shell material is fibrous or spherical, a fiber diameteris 1.3 to 36 micrometer, and a spherical diameter is 1 to 7.3 micrometer; an atomic ratio of Co to Cu is 0.25 to 21.6, and the atomic ratio of Co to Ag is 59.8 to 74.8; a saturation magnetization strength ranges from 62.2 to 159.9 emu/g . The bimetallic cobalt-based core-shell material adopts an in-situ metal replacement method and has a microwave absorption characteristic of broadband and high absorption, wherein an effective frequency band width of which the reflectivity is less than or equal to -10dB is 5.1-7.76GHz; a bandwidth less than or equal to -20dB is 2.32-16.0GHz; a maximum reflection loss ranges from -52.5 dB to -19.7 dB. The bimetallic cobalt-based core-shell material has the advantages of simple process, easy industrial popularization, excellent material performance and good application prospect in the fields of catalysis, electrode materials, microwave absorption, high-density magnetic recording materials, sensors and the like.

Liu Lin

Papers

Co/C/Fe/C Hierarchical Flowers with Strawberry-like Surface as Surface Plasmon for Enhanced Permittivity, Permeability, and Microwave Absorption Properties

Tailoring impedance match and enhancing microwave absorption of Fe3O4/Bi24Fe2O39/Bi hollow porous microrods by controlling their composition

Magnetic alloy hollow microsphere and preparation method thereof

Monodisperse ferrite micro-nano sheet and preparation method thereof

Bimetallic cobalt-based core-shell material as well as preparation method and application thereof