Being a low-energy, reusable, and environmentally friendly degradation technology, photocatalysis has excellent application prospects in textile dye wastewater degradation. In this study, we combine the advantages of photocatalysis and membrane technology to prepare photocatalytic membranes that immobilize the photocatalyst and alleviate membrane pollution. Dual-precursor graphitic carbon nitride (U6M1) was composited with Bi12TiO20 (BTO) using the annealing method to prepare a novel Δ(Z + II)-type BTO/U6M1 photocatalyst with visible-light response capacity. Subsequently, BTO/U6M1/PES composite photocatalytic membranes were fabricated using the nonsolvent-induced phase separation (NIPS) method, and the photodegradation activity of the composite membranes was executed against rhodamine B (RhB) dye. The results indicated that the composite membrane exhibiting the best photocatalytic performance achieved nearly 100 % degradation of RhB within 120 min. Furthermore, the membrane with optimal photocatalytic performance retained photocatalytic activity for five consecutive dye degradation tests, demonstrating its reusability.

中文翻译：

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Bi12TiO20/U6M1/PES 复合膜的制备，用于可见光照射下降解罗丹明 B


光催化作为一种低能耗、可重复使用、环保的降解技术，在纺织染料废水降解中具有极好的应用前景。在这项研究中，我们结合了光催化和膜技术的优势，制备了固定光催化剂并减轻膜污染的光催化膜。采用退火法将双前驱体石墨氮化碳 （U6M1） 与 Bi12TiO20 （BTO） 复合，制备了具有可见光响应能力的新型 Δ（Z + II） 型 BTO/U6M1 光催化剂。随后，使用非溶剂诱导相分离 （NIPS） 方法制备了 BTO/U6M1/PES 复合光催化膜，并对罗丹明 B （RhB） 染料执行复合膜的光降解活性。结果表明，光催化性能最佳的复合膜在 120 min 内实现了近 100% 的 RhB 降解。此外，具有最佳光催化性能的膜在连续 5 次染料降解测试中保持了光催化活性，证明了其可重复使用性。