The CC@TiO₂-Cu membranes with various Cu doping contents have been synthesized via a simple one-step hydrothermal method for oil-water separation application. It is found that a certain amount of Cu doping is beneficial for achieving visible light response and enhance the superhydrophilicity/underwater superoleophobic performance of CC@TiO₂-Cu membranes. Importantly, the CC@TiO₂-Cu2.5 membrane with cauliflower-like morphology shows excellent self-cleaning and antifouling performance under visible light driven. And its separation efficiency can still maintain up to 99.6% under gravity even after 80 cycles of oil-water separation experiments. The mechanisms of both oil-water separation and photocatalytic self-cleaning for the CC@TiO₂-Cu membrane are discussed in detail. The study provides a new concept for designing self-cleaning membrane to apply in oil-water separation.

通过一种简单的一步水热法在油水分离中合成了具有不同Cu掺杂含量的CC @ TiO ₂ -Cu膜。发现一定量的Cu掺杂有利于实现可见光响应并增强CC @ TiO ₂ -Cu膜的超亲水性/水下超疏油性能。重要的是，具有花椰菜状形态的CC @ TiO ₂ -Cu2.5膜在可见光驱动下具有出色的自清洁和防污性能。即使经过80次油水分离实验，其分离效率在重力作用下仍可保持高达99.6％。CC @ TiO ₂的油水分离和光催化自清洁机理-Cu膜被详细讨论。该研究为设计用于油水分离的自清洁膜提供了新的概念。