Preparation method of phosphorus doped bismuth phosphate photocatalyst

The invention discloses a preparation method of a phosphorus doped bismuth phosphate photocatalyst, and belongs to the technical field of preparing of nanometer materials; the preparation method is as follows: first mixing red phosphorus and deionized water in an autoclave for hydrothermal reaction, after the reaction, washing an obtained solid product with the deionized water, drying to obtain a red phosphorus precursor with surface oxides being removed; then under magnetic stirring, putting the red phosphorus precursor in an aqueous nitric acid solution in which bismuth nitrate is dissolved for ultrasonic treatment, placing the mixing system in the autoclave at 180 DEG C for hydrothermal reaction, and after the reaction, cooling to room temperature; then washing a precipitate product with the deionized water and ethanol, and finally, drying to obtain the phosphorus doped bismuth phosphate photocatalyst. According to the method, the phosphorus doped bismuth phosphate photocatalyst can be successfully prepared by one step low temperature hydrothermal method, the method is novel and simple, the phosphorus doped bismuth phosphate photocatalyst is high in photocatalytic activity, a simulated dye can be degraded under the condition of light irradiation, and 2.5 hours after the degradation rate is as high as 95%.