Preparation method of gadolinium oxide-coated ferroferric oxide magnetic fluorescent nano hollow spheres

A preparation method of gadolinium oxide-coated ferroferric oxide magnetic fluorescent nano hollow spheres is provided; a hard template method is utilized, silica with different inner diameters is used as a template, ferric hydroxide is precipitated on a silica gel, then the treated silica gel is used as the template and then is coated with rare earth gadolinium, and thus the Gd2O3-coated Fe3O4 magnetic fluorescent nano hollow spheres with different particle diameter sizes are obtained. The preparation method has the advantages of simple process, low cost and good repeatability, is suitable for large-scale production, and avoids influences brought by magnetic particle agglomeration. The prepared hollow spheres have relatively larger specific surface area; the adjustable range of the particle size is larger, and the adjustable field of the size of the hollow spheres is broadened; meanwhile, the hollow spheres have magnetic and fluorescent properties, enables the orientation to be controlled by adding a magneti