In this paper,BiOBr/diatomite composite photocatalyst was prepared by the method of hydrolysisdeposition using Bi(NO3)3.5 H2 O,KBr,and diatomite as raw materials.The photocatalytic property of the composites was investigated with tetracycline as a target pollutant under 50 W LED light irradiation.The effects of catalyst dosage,pH value,and light sources on tetracycline removal in suspension photocatalytic system were investigated.The results indicated that the hierarchical BiOX was loaded on the surface of diatomite in schistose.The photocatalytic degradation rate of tetracycline was up to 91....