Gas Sensing Properties for Composites of Metal–Organic Frameworks and Nanofiber Polymers

Metal–organic frameworks (MOFs), crystalline porous materials composed of metal nodes and organic linkers, have attracted significant attention for gas sensing applications due to their exceptionally high surface area and tunable chemical functionality. Concurrently, nanofiber polymers offer unique structural advantages, including high porosity, a continuous interconnected network, and excellent mechanical flexibility. Integrating these two distinct materials into a functional composite presents a powerful strategy to overcome the processing limitations of isolated MOF solid powders while maximizing gas diffusion kinetics. In this study, we fabricated a novel gas sensing composite based on a MOF–nanofiber polymer composite matrix. The synergistic combination of the highly selective, abundant reactive sites within the MOF and the robust, breathable architecture of the polymer nanofibers significantly enhanced the sensor's sensitivity, selectivity, and long-term stability under diverse environmental conditions. This work demonstrates the great potential of MOF–nanofiber composite platforms for next-generation flexible and wearable gas sensing technologies.