Preparation method, application and regenerating method of silicon magnetic hollow sphere ZnSixFe2-xO4

The invention discloses a preparation method, application and a regenerating method of a silicon magnetic hollow sphere ZnSixFe2-xO4, and relates to the technical field of adsorption materials, photocatalytic materials and wastewater treatment. The preparation method of the silicon magnetic hollow sphere ZnSixFe2-xO4 comprises the following steps: weighing and dissolving silicate, a ferric salt and a zinc salt in an alcohol-aqueous liquid; stirring and regulating the pH value of the liquid to 6.5-7.5, stirring at 50-70 DEG C, cooling and ageing; layering and removing the supernatant liquid, washing solid-phase matters with distilled water by many times until the solid-phase matters are neutral, and then washing the solid-phase matters with absolute ethyl alcohol; drying the solids in vacuum until the weight is constant, and calcining the solids to obtain the silicon magnetic hollow sphere. The silicon magnetic hollow sphere prepared by the preparation method can be used as a wastewater treating agent and also can be used as an antibacterial agent. When used as the wastewater treating agent, the silicon magnetic hollow sphere has good adsorption effects and photocatalysis. The preparation process is relatively simple, energy-saving and environmentally friendly; products can be conveniently separated and recycled, and can be recycled after being activated and regenerated, and thus, the preparation method has the advantages of being time-saving, safe, efficient, low in price and continuous in separating and recycling.