The photocatalytic degradation of two widely used antibiotics including Oxytetracycline (OTC) and Tetracycline (TC) in the aqueous suspension containing Bi2MoO6 nanosheets with (010) facets exposed to visible light was studied.The effects of catalyst amount,initial pH,and initial concentrations of substrates on the rates of photocatalytic degradation were investigated.The radical scavengers were added into the reaction solution to evaluate the activities of the free radicals.Results showed that pH significantly affected the degradation of OTC and TC.The maximum removal rates of OTC and TC were obtained at pH 11.0 with concentration of Bi2MoO6 of 1.4 g/L and initial concentration of substrates of 20 mg/L.Under these conditions,42.1% of OTC and 58.8% of TC were degraded under visible light for 60 minutes.The disappearance of these two compounds followed a pseudo-first-order kinetics based on the Langmuir-Hinshelwood (L-H) model.The rate constants for OTC and TC were 0.006 64 min-1 and 0.008 45 min-1,respectively.The surface reaction on Bi2MoO6 played an important role in degrading OTC and TC.The further study of reactive oxygen species (ROSs) showed that the photo-generated hole (h+) was mainly responsible for the degradation of OTC and TC.