<p>Tetracycline (TC), as a widely used antibiotic, poses significant environmental safety risks due to its persistence and bioaccumulation. Titanium dioxide (TiO₂) is a wide bandgap photocatalyst, and it only responds to ultraviolet light and has a low utilization of visible light, which severely restricts its applications. In this study, 12%BN/TiO₂ nanosheets obtained by a simple hydrothermal method combining hexagonal boron nitride (h-BN) and titanium dioxide (TiO₂) and the removal rate of TC almost reaches 99.7% within 30&#xa0;min under simulated sunlight. Moreover, there was almost no change in the activity of the catalyst after it was recycled five times. XPS results demonstrate that the formation of the B-O-Ti bond in 12% BN/TiO₂ leads to a rearrangement of the energy levels within TiO₂. This structural modification effectively narrows the band gap of the material, thereby significantly enhancing its ability to utilize visible light. Furthermore, the interfacial effect between h-BN and TiO₂ enhances the separation and migration of photogenerated electron–hole pairs. •O₂⁻ radicals are the main active species in the degradation of TC. This study confirmed that the BN/TiO₂ system had excellent photocatalytic activity and provides an effective approach for constructing high-performance photocatalysts.</p> Graphical Abstract <p></p>