Photocatalytic ozonation technique for wastewater treatment has received much attention for their efficient capability in the mineralization of persistent organic pollutants. In this study, nanostructured Bi₂WO₆ was prepared by hydrothermal method and applied in the photocatalytic ozonation process for tetracycline hydrochloride (TCH) degradation under simulated solar light irradiation. Bi₂WO₆ triggered an effective synergy between photocatalysis and ozonation, and it showed a good activity and adaptability in the degradation of organic compounds. Besides, the influence of experimental factors on the total organic carbon removal (including catalyst dosage, ozone concentration, initial pH, reaction temperature and coexisting ions) was also investigated comprehensively. Spin-trapping electron paramagnetic resonance measurements and quenching experiments demonstrated that O₂⁻, OH, ¹O₂ and h⁺ contributed to TCH degradation. The possible degradation pathways of TCH were proposed by identifying the intermediates with liquid chromatography-mass spectroscopy.

用于废水处理的光催化臭氧化技术因其在持久性有机污染物的矿化方面的高效能力而备受关注。本研究采用水热法制备了纳米结构的Bi ₂ WO ₆，并将其应用于模拟太阳光照射下的四环素盐酸盐（TCH）降解光催化臭氧化过程。的Bi ₂ WO ₆引发了光催化和臭氧化之间的有效协同作用，在有机化合物的降解中表现出良好的活性和适应性。此外，还综合考察了实验因素对有机碳去除总量的影响（包括催化剂用量、臭氧浓度、初始pH值、反应温度和共存离子）。自旋俘获电子顺磁共振测量和猝灭实验表明O ₂ ^-、OH、¹ O ₂和h ⁺ 有助于TCH降解。通过液相色谱-质谱法鉴定中间体，提出了TCH可能的降解途径。