Preparation method of In2Se3 nano material for photocatalytic degradation of tetracycline

The invention relates to a preparation method of an In2Se3 nano material for photocatalytic degradation of tetracycline, which comprises the following steps: (1) dissolving a soluble indium source and quantitative selenium powder in alkylamine, keeping the temperature in a three-neck flask filled with inert gas at 50-80 DEG C for 5-30 minutes, and uniformly mixing; (2) raising the temperature to 260-300 DEG C, keeping the temperature for 30-120 minutes at the temperature, enabling the sample to fully react, and cooling to room temperature; (3) cleaning the obtained reactant with an organic solvent for multiple times, performing centrifugal separation, and performing vacuum drying to obtain a powder product; and (4) finally, stirring the dried powder and a mixed solution of toluene and thiohydracrylic acid for 5-10 hours, removing the alkylamine ligand on the surface of a sample, and carrying out centrifugal cleaning, drying and grinding to prepare the In2Se3 nano material. The method has the advantages that t