Mechanistic study of B-TiO2/BiVO4 S-scheme heterojunction photocatalyst for tetracycline hydrochloride removal and H2 production

•In situ synthesis of B-TiO2 with visible light absorption for growth on BiVO4 to construct a novel S-type heterojunction.•B-TiO2/BiVO4 show highly photocatalytic degradation rate of TCH and H2 production.•Synergistic effect promotes visible light absorption as well as separation and transfer of photogenerated carriers.•The photocatalysis mechanism was proposed in the formation of an internalelectric field.