Method for spray synthesis of metal oxide hollow spherical powder and precursor of metal oxide hollow spherical powder

The invention discloses a method for spray synthesis of metal oxide hollow spherical powder and a precursor of the metal oxide hollow spherical powder, and belongs to the technical field of inorganicfunctional materials. The method comprises the steps: putting an aqueous solution of metal oxysalt in an ultrasonic atomizer, spraying aerosol generated through atomization of the aqueous solution into an alcohol solution by using carrier gas, adopting the alcohol solution as a precipitant at room temperature, performing stirring, controlling the mass ratio of alcohol to water at a value higher than 9:1 so as to obtain a suspension material, then performing suction filtration on the suspension material, performing washing and drying so as to obtain hollow spherical precursor powder, and finally calcining the precursor dry powder under suitable conditions so as to obtain the corresponding metal oxide hollow spherical powder. Through the method, high energy consumption, difficult separation,high cost, limited indust