For ammonia (NH₃), a kind of vital pollutant and raw chemical material, it is of great importance to develop materials with high stability and efficient capture performance from dry and humid atmosphere. Herein, a new IL@MOF composite was designed to enhance the NH₃ adsorption capacity using the ionic liquids (ILs) and stable metal–organic frameworks (MOFs). The obtained [BOHmim][Zn₂Cl₅]@MIL-101(Cr) exhibits a record NH₃ uptake of 24.12 mmol/g among the reported porous materials at 298 K and 1 bar, more than twice that of MIL-101(Cr) (8.92 mmol/g). More importantly, the composite is stable under the humid NH₃ conditions and the excellent NH₃ adsorption capacity can be well maintained (23.55 mmol/g) in a 20% NH₃ solution (approaching the saturated ammonia solution) steam atmosphere with good regenerability. The mechanism reveals that the metal center and hydroxyl-functionalized alkyl chain of IL confined in the framework of MOF provide multiple adsorption sites and large free volume for NH₃ capture. Moreover, the adsorbed water molecules can act as the additional adsorption sites, contributing to the excellent adsorption capacity in humid conditions. This work provides a general way to develop adsorbents for the capture of corrosive gases in combination of the advantages of IL and MOFs.

对于重要的污染物和化学原料之一的氨（NH ₃），开发在干燥和潮湿的环境中具有高稳定性和有效捕获性能的材料具有重要意义。本文中，设计了一种新的IL @ MOF复合材料，以使用离子液体（IL）和稳定的金属有机骨架（MOF）来增强NH _3的吸附能力。所报道的多孔材料在298 K和1 bar下获得的[BOHmim] [Zn ₂ Cl ₅ ] @ MIL-101（Cr）记录的NH ₃吸收记录为24.12 mmol / g，是MIL-101（ Cr）（8.92 mmol / g）。更重要的是，复合材料在潮湿的NH ₃条件下和优异的NH ₃条件下都是稳定的在20％NH ₃溶液（接近饱和氨溶液）的蒸汽气氛中，可以很好地保持吸附能力（23.55 mmol / g），并且具有良好的可再生性。该机理表明，在MOF框架内，IL的金属中心和羟基官能化的烷基链为NH _3的捕获提供了多个吸附位点和较大的自由体积。此外，被吸附的水分子可以充当额外的吸附位点，从而在潮湿条件下具有出色的吸附能力。这项工作结合了IL和MOF的优势，为开发用于捕获腐蚀性气体的吸附剂提供了一种通用方法。