双金属同构金属-有机框架材料CAU-21-Al/M的合成、 氮气吸附及复合膜性能

通过掺杂金属的方式实现了双金属同构金属-有机框架材料的制备, 采用X射线粉末衍射(PXRD)确定了多种金属在双金属CAU-21材料中的最大掺杂量, 使用扫描电子显微镜(SEM)观察了掺杂金属对材料形貌的影响. 热重分析(TGA)结果表明, CAU-21系列材料均具有较好的热稳定性. 氮气气体吸附测试及以CAU-21-Al/M为填料的混合基质膜对N₂气的渗透实验结果与掺杂金属离子尺寸大小呈相反的关系, 证实了双金属可实现对孔道结构及气体吸附性能的调控.

Synthesis,N2 Adsorption and Mixed-matrix Membrane Performance of Bimetal Isostructural CAU-21

The preparation of bimetal isostructural metal-organic frameworks（MOFs）was achieved by doping metals， and the maximum metal doping amounts of CAU-21-Al/M that can maintain the original crystal configuration were obtained from powder X-ray diffraction（PXRD）patterns. Scanning electron microscopy（SEM）was used to observed the influence of doping metals on the morphology of materials， and thermogravimetric analysis（TGA）showed that CAU-21-Al/M（M=Fe， Ga， In， Gd） all had good thermal stability. The results of nitrogen gas adsorptions and the gas permeation experiments of mixed-matrix membranes with CAU-21-Al/M as fillers are inversely related to the size of doped metal ions， verifing that dopping metal can effectively control the pore structure of MOFs.