Preparation of magneto-optical difunctional Fe3O4-SiO2-ZnS composite material

The invention provides an Fe3O4-SiO2-ZnS composite material having magnetic response and fluorescence performances, and belongs to the technical field of composite materials. The method comprises the following steps: dissolving Fe3O4 powder in an ethanol solution, adjusting the pH value of the obtained system to above 7, adding tetraethyl orthosilicate to the obtained system, reacting under stirring, washing the obtained product by using deionized water and anhydrous ethanol, drying, dispersing the obtained product in isopropanol containing zinc acetate, reacting under stirring for a period of time, adding an aqueous solution of thioacetamide to the obtained reaction system under an ultrasonic condition, and reacting under stirring at 50-60DEG C for a period of time; and washing the obtained reaction product by using deionized water and anhydrous ethanol, and drying to obtain the Fe3O4-SiO2-ZnS composite material. The result of the observation through a scanning electron microscope shows that the composite ma