中山大学苏成勇团队开发出具有优化孔隙-纳米空间的高水吸附MOFs用于室内湿度自主控制和污染物去除。相关研究成果发表在2021年11月15日出版的《德国应用化学》。

室内空气质量对人类的日常生活和健康至关重要，其中沸石、硅胶等吸附剂被广泛用于空气除湿和有害气体捕集。

该文中，研究人员开发了一种孔隙-纳米空间后工程策略，以优化具有长期稳定性的金属-有机框架（MOFs）的亲水性、吸水能力和空气净化能力，提供了一种具有自主多功能的湿度控制和污染物隔离的理想候选材料。通过对原有的UiO-67孔纳米空间中携带疏水性和亲水性基团的有机连接体进行变体调节，筛选出具有高热稳定性、水解稳定性和酸碱稳定性的中等亲水性MOF（UiO-67-4Me-NH 2-38%）。

其具有S形吸水等温线，恰好位于推荐的舒适和健康的室内相对湿度范围(45%-65% RH)和最大限度减少对健康的不利影响(40-60% RH)。其独特的吸水性能、工作能力/效率、污染物去除、可回收性和再生性在室内环境中具有巨大的应用潜力。

附：英文原文

Title: High Water Adsorption MOFs with Optimized Pore-Nanospaces for Autonomous Indoor Humidity Control and Pollutants Removal

Author: Neng-Xiu Zhu, Zhang-Wen Wei, Cheng-Xia Chen, Xiao-Hong Xiong, Yang-Yang Xiong, Zheng Zeng, Wei Wang, Ji-Jun Jiang, Ya-Nan Fan, Cheng-Yong Su

Issue&Volume: 2021-11-15

Abstract: The indoor air quality is of prime importance for human daily life and health, for which the adsorbents like zeolites and silica-gels are widely used for air dehumidification and harmful gases capture. Herein, we develop a pore-nanospace post-engineering strategy to optimize the hydrophilicity, water-uptake capacity and air-purifying ability of metal–organic frameworks (MOFs) with long-term stability, offering an ideal candidate with autonomous multi-functionality of moisture control and pollutants sequestration. Through variant tuning of organic-linkers carrying hydrophobic and hydrophilic groups in the pore-nanospaces of prototypical UiO-67, a moderately hydrophilic MOF (UiO-67-4Me-NH  2  -38%) with high thermal, hydrolytic and acid-base stability is screened out, featuring S-shaped water sorption isotherms exactly located in the recommended comfortable and healthy ranges of relative humidity for indoor ventilation (45%65% RH) and adverse health effects minimization (40-60% RH). Its exceptional attributes of water-uptake working capacity/efficiency, contaminates removal, recyclability and regeneration promise a great potential in confined indoor environment application.

DOI: 10.1002/anie.202112097

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202112097