Preparation method of antimony sulfide-molybdenum disulfide composite photocatalyst

The invention discloses a preparation method of an antimony sulfide-molybdenum disulfide composite photocatalyst. The preparation method comprises the steps of uniformly mixing a molybdenum disulfidecolloidal solution and an antimony sulfide colloidal solution, and then adjusting the pH value to 4.8 to 10.2 to obtain a translucent sol; aging the translucent sol, separating the solvent and the gel, and then drying the gel, performing grinding and sieving, and selecting dried gel particles with a particle size of 0.5 to 10 [mu]m as a precursor; and maintaining a temperature of 200 to 350 DEG Cfor 0.5 to 5 hours until the precursor is crystallized, so as to obtain the composite photocatalyst. The antimony sulfide-molybdenum disulfide composite photocatalyst obtained by the preparation method of the present invention have uniform particle distribution, a relatively uniform crystal form, high purity, strong stability, a fast electron transfer rate, strong light absorption, difficulty to aggregate, a large adsorpti