Synthesis and Properties of a Compositional Series of MIL-53(Al) Metal-Organic Framework Crystal-Glass Composites
Synthesis and Properties of a Compositional Series of MIL-53(Al) Metal-Organic Framework Crystal-Glass Composites
复制标题
DOI：
10.1021/jacs.9b07557
复制
发表时间：
2019-10-02
影响因子：
15
通讯作者：
Bennett, Thomas D.
中科院分区：
文献类型：
--
作者：
Ashling, Christopher W.;Johnstone, Duncan N.;Bennett, Thomas D.
金属有机框架晶体玻璃复合材料（MOF- cgc）是一种晶体MOF分散在MOF玻璃中的材料。在这项工作中，我们探索了MIL-53（Al）的开孔形式的室温稳定性，通常在高温下观察到，这发生在ZIF-62(Zn) MOF玻璃基体中。合成了一系列含有不同MIL-53（Al）的MOF-CGCs，并用x射线衍射和核磁共振波谱对其进行了表征。首次确定了MIL-53（Al）在复合材料中的稳定上限。利用对分布函数分析和扫描透射电镜对复合材料的纳米结构进行了表征。值得注意的是，我们确定了样品系列中晶体成分的分布和完整性，这些发现与MOF-CGC气体吸附能力有关，以便确定最大CO2吸附能力所需的最佳负载。
Metal-organic framework crystal-glass composites (MOF-CGCs) are materials in which a crystalline MOF is dispersed within a MOF glass. In this work, we explore the room-temperature stabilization of the open-pore form of MIL-53(Al), usually observed at high temperature, which occurs upon encapsulation within a ZIF-62(Zn) MOF glass matrix. A series of MOF-CGCs containing different loadings of MIL-53(Al) were synthesized and characterized using X-ray diffraction and nuclear magnetic resonance spectroscopy. An upper limit of MIL-53(Al) that can be stabilized in the composite was determined for the first time. The nanostructure of the composites was probed using pair distribution function analysis and scanning transmission electron microscopy. Notably, the distribution and integrity of the crystalline component in a sample series were determined, and these findings were related to the MOF-CGC gas adsorption capacity in order to identify the optimal loading necessary for maximum CO2 sorption capacity.