Photocatalytic membranes are the most effective solution for dye wastewater treatment and membrane pollution reduction, among them, how to improve the visible light responsiveness of photocatalytic membranes is the focus of research in this direction. In this paper, a novel Δ(Z + II)-type photocatalyst with visible light responsiveness was prepared using YVO 4 -modified dual-precursorgraphitic carbon nitride (U6M1). The Nonsolvent Induce Phase Separation (NIPS) was used to create the YVO 4 /U6M1/PES membrane, which gave the membrane photocatalytic capacity. The efficiency of removing rhodamine B(RhB) reached 99 % within 120 min, and the separation efficiency of Acid Red 18(AR-18) reached 95.1 % within 150 min. In addition, the membrane also has certain self-cleaning capabilities and can maintain a separation efficiency of more than 89 % after 5 cycles. As a green material, the composite membrane loaded with YVO 4 /U6M1 photocatalyst has great potential in the practical application of dye wastewater treatment.
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 Bi 12 TiO 20 (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.
危险品化学品经营许可证（带存储）