Senith Ravishan Fernando John, Asaithambi Shivani S, Maruti Chavan Sachin
Department of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, BOX 8600 Forus, 4036, Stavanger, Norway.
Department of Materials Science, School of Chemistry, Madurai Kamaraj University, Madurai, 625021, Tamil Nadu, India.
Chempluschem. 2024 Nov;89(11):e202400107. doi: 10.1002/cplu.202400107. Epub 2024 Jul 5.
Metal-organic frameworks (MOF) hold great promise for CO adsorption due to their high surface areas, tunable pore sizes, and the ability to modify their chemical properties to enhance CO affinity. MOFs tagged with functional groups either at linker or metal sites have shown improved CO uptake capacity and selectivity. This study focuses on investigating the potential of selective CO adsorption using amino functionalization of linker forming Ce-UiO-66. The physicochemical properties and characteristics of MOFs to determine the degree of amino functionalization and structural stability were examined using powder X-ray diffraction (PXRD), Fourier transformer infra-red (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and N porosimetry and specific surface area (BET). This work unveils a novel array of results on CO, N and water vapour adsorption on Ce-UiO-66-NH. The amino-functionalized Ce-UiO-66-NH shows 63 % higher CO uptake and 84 % higher CO/N selectivity at 273 K and 1 bar over Ce-UiO-66. Ce-UiO-66-NH also shows excellent structural stability after gas and vapour sorption making Ce-UiO-66-NH potential adsorbent for CO capture.
金属有机框架材料（MOF）因其高比表面积、可调节的孔径以及能够修饰其化学性质以增强对一氧化碳（CO）的亲和力，在CO吸附方面具有巨大潜力。在连接体或金属位点标记有官能团的MOF已显示出提高的CO吸附容量和选择性。本研究重点在于研究通过连接体氨基功能化形成Ce-UiO-66来选择性吸附CO的潜力。使用粉末X射线衍射（PXRD）、傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、热重分析（TGA）以及N2孔隙率和比表面积（BET）分析来检测MOF的物理化学性质和特征，以确定氨基功能化程度和结构稳定性。这项工作揭示了一系列关于Ce-UiO-66-NH对CO、N2和水蒸气吸附的新结果。在273K和1bar条件下，氨基功能化的Ce-UiO-66-NH比Ce-UiO-66的CO吸附量高63%，CO/N2选择性高84%。Ce-UiO-66-NH在气体和蒸汽吸附后也显示出优异的结构稳定性，使其成为用于CO捕获的潜在吸附剂。
