Method for preparing hollow nano calcium carbonate by utilizing ultrasonic aerosol

The invention relates to the technical field of preparation of nano hollow materials, in particular to a method for preparing hollow nano calcium carbonate by using ultrasonic aerosol, which comprisesthe following steps: 1) drying carbon dioxide; 2) metering carbon dioxide; 3) heating carbon dioxide; and 4) carbonizing the calcium hydroxide liquid drops. The hollow nano calcium carbonate preparedby the method can be used as a carrier particle for coating other components; in addition, calcium hydroxide emulsion droplets in an ultrasonic aerosol generating device are used for generating calcium hydroxide solution aerosol in a dry heat and excessive carbon dioxide atmosphere; calcium carbonate crystals are generated on the surfaces of the aerosol droplets to form a shell layer, and meanwhile, surface moisture of the calcium hydroxide emulsion droplets is evaporated in the carbonization process, so that the calcium hydroxide emulsion droplets lose water, and finally, hollow nano calciumcarbonate is formed. 本发明涉纳