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In this study, highly visible‐light photoactive nitrogen and sulfur co‐doped TiO₂ (N,S‐TiO₂) nanoparticles and nanosheets were synthesized via facile sol–gel and hydrothermal methods, respectively. The photocatalytic activities of N,S‐TiO₂ catalysts were evaluated by degradation of non‐steroidal anti‐inflammatory drugs, ibuprofen (IBP) and naproxen (NPX), under simulated solar irradiation.

The N,S‐TiO₂ nanoparticle is a well‐developed mesoporous structure that contains both anatase and rutile phases and a large BET surface area (132 m² g⁻¹). N,S‐TiO₂ nanosheets contain a complete anatase phase with a larger mesoporous structure and a smaller BET surface area (64 m² g⁻¹). The results showed that at catalyst loading of 2.0 g L⁻¹ and pH 6, N,S‐TiO₂ nanoparticles can degrade 85% and 99.3% of IBP and NPX. At the same conditions, 71.6% of IBP and 99.1% of NPX were …