No abstract

BACKGROUND: In this study, highly visible-light photoactive nitrogen and sulfur co-doped TiO 2 (N,S-TiO 2 ) nanoparticles and nanosheets were synthesized via facile sol-gel and hydrothermal methods, respectively. The photocatalytic activities of N,S-TiO 2 catalysts were evaluated by degradation of non-steroidal anti-inflammatory drugs, ibuprofen (IBP) and naproxen (NPX), under simulated solar irradiation. RESULTS:The N,S-TiO 2 nanoparticle is a well-developed mesoporous structure that contains both anatase and rutile phases and a large BET surface area (132 m 2 g −1 ). N,S-TiO 2 nanosheets contain a complete anatase phase with a larger mesoporous structure and a smaller BET surface area (64 m 2 g −1 ). The results showed that at catalyst loading of 2.0 g L −1 and pH 6, N,S-TiO 2 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 degraded by N,S-TiO 2 nanosheets in this study. CONCLUSION:The high photocatalytic activity of N,S-TiO 2 may be due to synergistic effects of nitrogen and sulfur co-doping into TiO 2 , resulting in better separation of photogenerated electrons and holes and higher-visible light adsorption. Reusability tests of N,S-TiO 2 showed that it could retain its catalytic activity even after six cycles.

No abstract

No abstract

No abstract