Integration of photocatalysis and membrane separation is a promising approach for foulants degradation due to its energy-saving and high efficiency. However, the widely-studied photocatalytic membranes are still hard to be industrialized because of the difficulty in set-up of light source in the membrane module under high pressure. In this work, visible-light-activated photocatalytic membrane was prepared by loading polyethyleneimine-graphitic carbon nitride (PEI-GCN) on polydopamine (PDA) coated membrane for highly efficient production of H₂O₂. Fenton-like reaction was triggered upon H₂O₂ contacting with a separation membrane with FeOOH catalytic layer, which was fabricated via a co-deposition method followed by mineralization. Oxidation of the organic compound was initiated by hydroxyl radicals generated through the Fenton-like reactions in the presence of photogenerated H₂O₂, thus achieving effective membrane cleaning. This sectional photocatalysis-membrane cleaning technique independent of the separation membrane module offers a possibility for sustainable membrane fouling control in large-scale application.

光催化与膜分离相结合具有节能、高效等优点，是一种很有前景的污染物降解方法。然而，由于在高压下的膜组件中光源设置困难，被广泛研究的光催化膜仍然难以工业化。在这项工作中，通过将聚乙烯亚胺-石墨氮化碳 (PEI-GCN) 负载在聚多巴胺 (PDA) 涂层膜上制备了可见光活化的光催化膜，以高效生产 H ₂ O ₂。H ₂ O ₂引发类芬顿反应与带有 FeOOH 催化层的分离膜接触，该膜通过共沉积方法制备，然后矿化。在光生H ₂ O ₂存在下，通过类芬顿反应产生的羟基自由基引发有机化合物的氧化，从而实现有效的膜清洁。这种独立于分离膜组件的分段光催化膜清洁技术为大规模应用中可持续的膜污染控制提供了可能性。