Construction of dual-adsorption-site functionalized porphyrin metal-organic framework-loaded aerogel materials and their photo-catalytic uranium extraction performance.

Using porphyrin as the functional organic ligand, Por-MOFs were obtained by introducing functional sites into the porphyrin framework via a one-pot method. Subsequently, the density of uranyl ion recognition sites was increased through a post-synthetic modification strategy. The resulting material was then loaded onto a bacterial cellulose network using high-speed stirring-assisted assembly technology, successfully constructing a large-sized porphyrin MOF-based aerogel with dual active centers. The results showed that the NH2-MOF exhibited excellent stability in the pH range of 6-9, and its stability under strongly acidic conditions was significantly enhanced. The functionalized PN-MOF also possessed a high specific surface area and ideal structural stability, demonstrating acceptable uranium capture capability. This strategy achieves multi-scale controllable construction from the molecular design of active sites to macroscopic bulk materials, showing its potential for application in photocatalytic uranium reduction systems.