Metal–organic frameworks (MOFs) are a class of microporous materials that have been highlighted with fast and selective sorption of gas molecules; however, they are at least partially unstable in the scale-up process. Here, we report a rational shaping of MOFs in a scalable architecture of fiber sorbent. The long-standing stability challenge of MOFs was resolved by using stable metal oxide precursors that are subject to controlled surface oxide dissolution-growth chemistry during the Mg-based MOF synthesis. Highly uniform MOF crystals are synthesized along with the open-porous fiber sorbents networks, showing unprecedented cyclic CO₂ capacities in both flue gas and direct air capture (DAC) conditions. The same chemistry enables an in situ flow synthesis of Mg-MOF fiber sorbents, providing a scalable pathway for MOF synthesis in an inert condition with minimal handling steps. This modular approach can serve both as a reaction stage for enhanced MOF fiber sorbent synthesis and as a “process-ready” separation device.

中文翻译：

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在可扩展的开孔接触器中受控合成金属-有机骨架以最大限度地提高碳捕获效率

金属有机框架（MOFs）是一类微孔材料，具有快速和选择性地吸附气体分子的特点。然而，它们在放大过程中至少部分不稳定。在这里，我们报告了在可扩展的纤维吸附剂架构中 MOF 的合理成型。MOF 长期存在的稳定性挑战通过使用稳定的金属氧化物前体来解决，这些前体在 Mg 基 MOF 合成过程中受到受控表面氧化物溶解-生长化学的影响。高度均匀的 MOF 晶体与开孔纤维吸附剂网络一起合成，显示出前所未有的循环 CO ₂烟气和直接空气捕获 (DAC) 条件下的容量。相同的化学过程可以实现 Mg-MOF 纤维吸附剂的原位流动合成，为在惰性条件下合成 MOF 提供了一条可扩展的途径，并具有最少的处理步骤。这种模块化方法既可以用作增强 MOF 纤维吸附剂合成的反应阶段，也可以用作“工艺就绪”分离装置。