In the present work, we reported a simple method for the simultaneous phosphorus (P) doping and oxygen vacancies creation on TiO₂ in a single step. The obtained P-doped TiO₂ with surface oxygen vacancies (PTSOV) samples exhibited efficient photocatalytic activity for the degradation of fluoroquinolone antibacterial agent (ciprofloxacin) under visible light irradiation. The optimized sample showed a rate constant of 0.065 min^-1 for degradation of ciprofloxacin (CIP) and it was about 16.2 times as high as that of TiO₂ (0.004 min^-1). The transformation products of CIP were identified by liquid chromatography-mass spectrometry (LC-MS), and degradation pathway was tentatively proposed. The doping state of P and the formation of surface oxygen vacancies (SOVs) were investigated by different methods. X-ray diffraction (XRD) and X-ray Photoemission Spectroscopy (XPS) revealed P⁵⁺ doped via formation Ti-O-P bond. Electron paramagnetic resonance (EPR) spectroscopy revealed that SOVs were generated on P-doped TiO₂. It turned out that the synergistic effect between doping P and SOVs on TiO₂ greatly improved transfer and separation efficiency of photogenerated charges, thus significantly enhanced the visible light photocatalytic performance of TiO₂. Our work would provide an effective way to design new photocatalysts with high performance under visible light irradiation.

在目前的工作中，我们报告了一种简单的方法，可在单个步骤中同时在TiO ₂上产生磷（P）掺杂和氧空位。获得的具有表面氧空位（PTSOV）的P掺杂的TiO ₂在可见光照射下对降解氟喹诺酮类抗菌剂（环丙沙星）表现出有效的光催化活性。优化后的样品对环丙沙星（CIP）的降解速率常数为0.065 min ^-1，约为TiO ₂（0.004 min ^-1）的16.2倍。）。通过液相色谱-质谱法（LC-MS）鉴定了CIP的转化产物，并初步提出了降解途径。通过不同的方法研究了P的掺杂状态和表面氧空位（SOV）的形成。X射线衍射（XRD）和X射线光电子能谱（XPS）揭示了通过形成Ti-OP键掺杂的P ⁵⁺。电子顺磁共振（EPR）光谱表明，SOVs是在P掺杂的TiO ₂上生成的。结果表明，掺杂P和SOVs对TiO ₂的协同作用大大提高了光生电荷的转移和分离效率，从而显着提高了TiO ₂的可见光光催化性能。。我们的工作将为设计在可见光照射下具有高性能的新型光催化剂提供有效途径。