| Magnetic micro/nano materials already have extensive applications in many fields. In order to satisfy the demand of the different application requirements, the magnetic micro/nano material need to combine with other micro/nano composite material to form magnetic composite micro/nano materials, which make the magnetic composite micro/nano materials to realize magnetic separation at the same time also have other properties of multifunctional application, thus expanding the application range of micro/nano material, as well as other applications. The magnetic composite micro/nano materials solved the current problem which many single micro/nano material could not at the area of application and function. The mainly magnetic composite micro/nano materials of this paper are Fe3O4@SiO2@ZrO2:Tb3+and Fe3O4@Ni Si O3.New water-soluble magnetic and fluorescent Fe3O4@SiO2@ZrO2:Tb3+ spherical nanocomposites have been successfully synthesized through the modified St?ber sol–gel process and in-situ synthesized method. The morphology, size, phase, magnetic properties and fluorescent properties of as-synthesized nanoparticles were well investigated by a series of characterization. The results show that magnetic composite micro/nano particles exhibit superparamagnetism and fluorescence properties of Tb3+ions. The magnetic and fluorescent Fe3O4@Si O2@ZrO2:Tb3+ nanocomposites will show potential applications in biomedical fields in the future.Hierarchical core–shell structured Fe3O4@NiSiO3 magnetic microspheres have been synthesized by modified St?ber sol–gel process and solvothermal method. The prepared composites were investigated by a series of characterization. The prepared composites were used in adsorption organic methylene blue（MB） from wastewater. The microspheres possess high porosity and magnetic property, which allow the Fe3O4@NiSiO3 microspheres to exhibit efficient adsorption capacity and convenient separation, and indicate good regeneration capacity and reusability. |
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