Abstract
Fe3O4@SiO2 core–shell nanostructures with different core diameter and shell thicknesses were prepared by modified stöber method and then converted into FexOy@SiO2 by H2. The structure, morphology and electromagnetic properties of FexOy@SiO2 core–shell nanostructures were investigated. Experimental results demonstrate that the as-prepared FexOy@SiO2 nanoparticles with deeply reduction not only exhibit significantly enhanced magnetic properties with maximum saturation magnetization values of 76.032emu/g vs. 50.310emu/g of Fe3O4@SiO2 core–shell spheres, but also show enhanced microwave absorption properties with the maximum reflection loss value of −23dB at 9.2GHz under a thickness of 2.5mm, which give forceful evidences that these FexOy@SiO2 core–shell nanomaterials are attractive materials for microwave absorption applications.
Published Version
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