Catalytic ozonation technology has attracted copious attention in water purification owing to its favorable oxidative degradation of pollutants and mitigation of membrane fouling capacity. However, its extensive industrial application has been restricted by the low ozone utilization and limited mass transfer of the short-lived radical species. Interlayer space-confined catalysis has been theoretically proven to be a viable strategy for achieving high catalytic efficiency. Here, a two-dimensional MnO₂-incorporated ceramic membrane with tunable interspacing, which was obtained via the intercalation of a carbon nanotube, was designed as a catalytic ozonation membrane reactor for degrading methylene blue. Benefiting from the abundant catalytic active sites on the surface of two-dimensional MnO₂ as well as the ultralow mass transfer resistance of fluids due to the nanolayer confinement, an excellent mineralization effect, i.e., 1.2 mg O_3(aq) mg⁻¹ TOC removal (a total organic carbon removal rate of 71.5%), was achieved within a hydraulic retention time of 0.045 s of pollutant degradation. Further, the effects of hydraulic retention time and interlayer spacing on methylene blue removal were investigated. Moreover, the mechanism of the catalytic ozonation employing catalytic ozonation membrane was proposed based on the contribution of the Mn(III/IV) redox pair to electron transfer to generate the reactive oxygen species. This innovative two-dimensional confinement catalytic ozonation membrane could act as a nanoreactor and separator to efficiently oxidize organic pollutants and enhance the control of membrane fouling during water purification.

催化臭氧化技术由于具有良好的污染物氧化降解和降低膜污染能力，在水净化领域引起了广泛关注。然而，其广泛的工业应用受到臭氧利用率低和短寿命自由基物质传质有限的限制。层间空间受限催化已被理论上证明是实现高催化效率的可行策略。在这里，通过嵌入碳纳米管获得的具有可调间距的二维 MnO ₂掺入陶瓷膜被设计为用于降解亚甲蓝的催化臭氧化膜反应器。受益于二维MnO ₂表面丰富的催化活性位点以及由于纳米层的限制，流体的超低传质阻力，极好的矿化效果，即 1.2 mg O _3(aq) mg ^-1TOC 去除（总有机碳去除率为 71.5%）是在污染物降解 0.045 秒的水力停留时间内实现的。此外，研究了水力停留时间和层间距对亚甲基蓝去除的影响。此外，基于Mn（III / IV）氧化还原对对电子转移产生活性氧的贡献，提出了采用催化臭氧化膜的催化臭氧化机制。这种创新的二维限制催化臭氧化膜可以作为纳米反应器和分离器，有效地氧化有机污染物，并在水净化过程中加强对膜污染的控制。