Effect of Water Adsorption on Retention of Structure and Surface Area of Metal-Organic Frameworks
Effect of Water Adsorption on Retention of Structure and Surface Area of Metal-Organic Frameworks
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DOI：
10.1021/ie202325p
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发表时间：
2012-05-09
影响因子：
4.2
通讯作者：
Walton, Krista S.
中科院分区：
文献类型：
--
作者：
Schoenecker, Paul M.;Carson, Cantwell G.;Walton, Krista S.
本文介绍了在室温和相对湿度高达90%的条件下，金属有机框架（MOFs）对水的吸附实验研究。通过粉末X射线衍射（PXRD）和氮吸附测量分析再生后的材料的结构降解。具有开放金属位点的MOF是相当亲水的，但根据PXRD似乎保持其结构。然而，显著的表面积损失表明正在发生分解，并且可能是再生过程中存在氧气的属性。具有铜桨轮（HKUST-1）、5配位镁（Mg M0 F-74）和7配位锆（U10 -66（-NH 2））的材料保持良好的结构稳定性，而含有Zn-COOH的M0 F（DM 0 F-1; DM 0 F-1-NH 2; UMCM-1）经历结晶度的完全损失。
This work presents an experimental investigation of water adsorption in metal organic frameworks (MOFs) at room temperature and up to 90% relative humidity. Structural degradation of the materials after regeneration is analyzed via powder X-ray diffraction (PXRD) and nitrogen adsorption measurements. MOFs with open metal sites are quite hydrophilic but appear to maintain their structure according to PXRD. However, significant surface area loss indicates that decomposition is occurring and is likely an attribute of oxygen presence during the regeneration procedure. Materials with copper paddle-wheel (HKUST-1), 5-coordinated magnesium (Mg MOF-74), and 7-coordinated zirconium (UiO-66(-NH2)) maintain good structural stability, while Zn-COOH containing MOFs (DMOF-1; DMOF-1-NH2; UMCM-1) undergo complete loss of crystallinity.