Bismuth oxychloride microspheres with high sunlight reflectivity as well as preparation method and application of bismuth oxychloride microspheres

The invention discloses a bismuth oxychloride microsphere with high sunlight reflectivity and a preparation method and application thereof.The preparation method of the microsphere comprises the steps that a bismuth-containing solution and a chlorine-containing solution are mixed to be subjected to a hydrolysis reaction, a precursor is obtained, the chlorine-containing solution is prepared by dissolving chlorine salt into a structure inducer water solution with the mass fraction being smaller than 12%, and the structure inducer water solution is obtained; the bismuth-containing solution is prepared by dissolving bismuth salt into an acetic acid solution, the molar ratio of the bismuth salt to chlorine salt is less than 1: 0.4, and then calcining the precursor at the temperature of less than 500 DEG C to obtain the bismuth oxychloride microspheres with high solar reflectance. The preparation method disclosed by the invention has the advantages of simple process, convenience in operation, mild reaction conditio