Tuning defects of metal–organic frameworks (MOFs) can greatly influence their performances in guest adsorption. The generation of defects in MOFs is mostly controlled under the conventional batch-heating methods, which usually cost energy and time. Herein, structural defects were rapidly constructed within dihydroxyl-functionalized UiO-66(Zr) MOF (UiO-66(Zr)-(OH)₂) via an exchange reaction between a modulator molecule and bridging linker in a microwave-assisted continuous-flow tubular reactor. The linker deficiency per secondary building unit ranged from 0.60 to 2.30 upon changing the modulator concentration. The porosity and CO₂ adsorption ability of the defective UiO-66(Zr)-(OH)₂ adsorbent were strongly influenced by the defect concentration. The obtained results indicated that the structure-modified UiO-66(Zr)-(OH)₂ containing a moderate linker deficiency amount of ∼1.29 exhibited the maximum CO₂ uptake amount and ideal adsorbed solution theory–predicted CO₂/N₂ selectivity of ∼6.23 mmol g⁻¹ and 118 (at 25 °C and 100 kPa), respectively, exceeding those of the conventionally prepared counterpart and benchmark CO₂ adsorbents.

调整金属有机骨架（MOF）的缺陷会极大地影响其在客体吸附中的性能。MOF中缺陷的产生通常通过常规的分批加热方法来控制，这通常会浪费能量和时间。在本文中，通过微波辅助连续流中调节剂分子与桥联接头之间的交换反应，在二羟基官能化的UiO-66（Zr）MOF（UiO-66（Zr）-（OH）₂）中迅速构建了结构缺陷。管式反应器。更改调节剂浓度后，每个二级构建单元的接头缺乏症的范围为0.60至2.30。有缺陷的UiO-66（Zr）-（OH）₂的孔隙率和CO ₂吸附能力吸附剂受缺陷浓度的强烈影响。所得结果表明，结构改性的UiO-66（Zr）-（OH）₂含有适度的〜1.29的适度接头缺陷，表现出最大的CO ₂吸收量和理想的吸附溶液理论预测的CO ₂ / N ₂选择性。分别为〜6.23 mmol g ^-1和118（在25°C和100 kPa下），超过了常规制备的对应吸附剂和基准CO ₂吸附剂。