▎ 摘　　要

The low separation efficiency of photogenerated electron-hole pairs is the main factor that restricts the perfor-mance of photocatalysts. In this paper, BiVO4/MoS2@GO composites were synthesized by in-situ hydrothermal method, and the experimental conditions were optimized by orthogonal test to improve the separation rate of photogenerated electron-hole pairs. The as-prepared BiVO4/MoS2@GO composites exhibited a Z-scheme het-erojunction, which effectively promoted photogenerated electron-hole pair separation. In addition, the separa-tion rate of photogenerated electron-hole pairs was effectively improved by using graphene oxide nanosheets as electron transport channels. This enhanced the utilization rate of photogenerated carriers in the BiVO4/ MoS2@GO composites, thus improving the photocatalytic activity. The photocatalytic tetracycline degradation rate of the as-prepared BiVO4/MoS2@GO in the best working conditions was 13 times and 2.4 times higher than that of MoS2 and BiVO4. This work provides new insight into the preparation of photocatalysts with an efficient electron transfer mechanism.