Bismuth/bismuth titanate heterojunction hollow nanospheres and method for preparing the same and application thereof

A method for photocatalytic degradation of tetracycline hydrochloride, comprising:

• (1) preparing bismuth-bismuth titanate heterojunction hollow nanospheres by adding a bismuth salt and tetrabutyl titanate into an organic solvent, mixing evenly, adding an inorganic alkali solution to generate a precipitation, then sequentially adding an organic amine and an organic acid, performing a solvothermal treatment to obtain bismuth titanate hollow nanospheres, and then thermally reducing the bismuth titanate hollow nanospheres with a borohydride under an inert atmosphere to obtain the bismuth-bismuth titanate heterojunction hollow nanospheres;
• wherein the organic solvent is 2-methoxyethanol or ethylene glycol;
• wherein a temperature for thermally reducing is 200 to 600° C. for 10 to 100 minutes;
• and
• (2) applying the prepared bismuth-bismuth titanate heterojunction hollow nanospheres by adding the bismuth-bismuth titanate heterojunction hollow nanospheres to an aqueous solution containing tetracycline hydrochloride, and irradiating the aqueous solution under light conditions such that photocatalytic degradation of tetracycline hydrochloride occurs.