The dramatic increase of atmospheric CO 2 concentration is responsible for a fast and potentially unpredictable global climate change. Therefore, the implementation of negative carbon technologies such as direct air capture (DAC) is needed. Metal‐organic frameworks (MOFs) have the potential to perform CO 2 DAC achieving unprecedented performances. Herein strategies to improve the CO 2 capture efficiency of MOFs and their potential implementation in real applications are exposed. Three main categories of targeted modifications to the frameworks are usually performed to enhance the CO 2 uptake capacity and adsorption selectivity: i) modifications to the metal unit; ii) modifications to the linker unit; iii) confinement of solvents within MOFs. The synthesis of MOF composites using other porous materials as support is also a useful method to improve the CO 2 capture performances. Another approach consists in the synthesis of amine functionalized MOFs, which can chemically bind carbon dioxide.

中文翻译：

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增强金属-有机框架中二氧化碳捕集的策略

大气中CO 2浓度的急剧增加是造成全球气候快速变化和潜在变化的原因。因此，需要实施负碳技术，例如直接空气捕获（DAC）。金属有机框架（MOF）具有执行CO 2 DAC的潜力，可实现前所未有的性能。本文介绍了提高MOF的CO 2捕集效率的策略及其在实际应用中的潜在实现。通常进行对框架的目标修饰的三个主要类别以增强CO 2吸收能力和吸附选择性：i）对金属单元的修饰；ii）修改链接器单元；iii）将溶剂限制在MOF中。使用其他多孔材料作为载体的MOF复合材料的合成也是提高CO 2捕集性能的有用方法。另一种方法是合成胺官能化的MOF，它可以化学结合二氧化碳。