Perforating Catalyst‐Embedded Nanofibers With Adaptive Interfacial Microenvironments for Fast and Durable Indoor Ozone Elimination

ABSTRACT Ground‐level ozone poses a serious threat to human health. However, developing catalytic membranes with high ozone conversion, low resistance, and long‐term durability under humid conditions remains challenging. Here, we introduce a selective swelling‐induced segmental reorganization strategy for fabricating perforating catalyst‐embedded nanofibrous membranes for efficient ozone decomposition. Using polysulfone‐ block ‐poly(ethylene glycol) (PSF‐ b ‐PEG, abbreviated as SFEG) as a scaffold, the controlled swelling process generates interconnected through‐channels within individual nanofibers, enhancing the accessibility of catalytically active sites. In combination with the interconnected inter‐fiber pores formed by fiber stacking during electrospinning, a continuous through‐pore network is established, enabling efficient gas transport at a low pressure drop. Also, migrated PEG segments create a moisture‐compatible environment that regulates water interaction, thereby maintaining high catalytic activity under humid conditions. Versatility of this approach enables the fabrication of diverse catalyst‐embedded membranes, exhibiting outstanding performance in ozone elimination. Nearly complete ozone conversion (∼100%) is achieved with a pressure drop of only 0.15% of atmospheric pressure, while long‐term filtration efficiency maintains over 99% for 600 h under humid conditions. This membrane‐engineering strategy paves the way for the development of advanced catalytic membranes for sustainable air purification applications.