Yoo Dong Kyu, Woo Ho Chul, Jhung Sung Hwa
Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41566, Republic of Korea.
ACS Appl Mater Interfaces. 2020 Jul 29;12(30):34423-34431. doi: 10.1021/acsami.0c08881. Epub 2020 Jul 16.
Effective removal of particulate matters (PMs) from air is very important for our safe environment, health, and sustainability. In this study, isostructural (with the same topology of ) Zr-metal-organic frameworks (Zr-MOFs) such as UiO-66, UiO-67, and DUT-52 (with different porosity) were coated onto cotton and utilized in PM removal from air to understand the contribution of MOFs in improving the performances of air filters. Moreover, UiO-66s with different porosities were also prepared under different conditions from the same reaction mixture. Experiments to remove PMs such as PM2.5 and PM10 showed a critical role of porosity of coated MOFs in the PM removal. Or, the removal efficiency or quality factor increased linearly with the increasing surface area of all the studied MOFs, irrespective of the applied linkers (for synthesizing different MOFs) and synthesis conditions (for different porosities of UiO-66s). Therefore, this work confirms, for the first time, that the porosity of MOF is one of the most important parameters to improve the performance of air filter (to remove PMs) that is modified with coated MOFs. Moreover, we could suggest why porous materials with small pores were effective in capturing PMs (larger in size than pores of porous materials) from air.
从空气中有效去除颗粒物（PMs）对我们的安全环境、健康和可持续发展非常重要。在本研究中，将等结构（具有相同拓扑结构）的锆基金属有机框架材料（Zr-MOFs），如UiO-66、UiO-67和DUT-52（具有不同孔隙率）涂覆在棉花上，并用于从空气中去除PMs，以了解MOFs在提高空气过滤器性能方面的作用。此外，还从相同反应混合物在不同条件下制备了具有不同孔隙率的UiO-66。去除PM2.5和PM10等PMs的实验表明，涂覆MOFs的孔隙率在去除PMs中起关键作用。或者说，去除效率或品质因数随所有研究MOFs的表面积增加而线性增加，与所应用的连接体（用于合成不同MOFs）和合成条件（用于不同孔隙率的UiO-66）无关。因此，这项工作首次证实，MOF的孔隙率是提高用涂覆MOFs改性的空气过滤器（去除PMs）性能的最重要参数之一。此外，我们可以解释为什么具有小孔的多孔材料能有效地从空气中捕获PMs（尺寸大于多孔材料的孔）。
