Method for preparing hollow ball with double-layer structure and hollow ball with multi-layer complex structure by template method

The invention belongs to the field of materials with a hollow structure, in particular to a method for preparing double-layer hollow spheres and hollow spheres with multi-layer compound structures by using a template method. The invention prepares the compound hollow sphere by taking a polymer hollow sphere as a template and combining sol-gel, settlement reaction and redox process through the method of forcing interface or surface settlement, removes the template polymer through high sintering or selective extraction of a solvent to obtain the hollow spheres of minerals, metals and organic matters. The structure and the size of the hollow sphere can be controlled through controlling the reagent activity, the feeding mode, the reagent concentration and a circulation reaction method; besides, compounding of various matters can be realized; the hollow sphere of the invention not only has good dispersing performance, but also has excellent strength and size stability. The invention relates to the application of the materials with a hollow structure.