Hydrogen Adsorption on Zn-BDC, Cr-BDC, Ni-DABCO, and Mg-DOBDC Metal–Organic Frameworks

Abstract

This work reports hydrogen adsorption properties of four different metal–organic frameworks (MOFs) namely Zn-BDC, Cr-BDC, Ni-DABCO, and Mg-DOBDC. Gravimetric hydrogen adsorption measurements are performed over a wide range of temperature (90 K to 298 K) and pressure (0 bar to 100 bar). At the lowest experimental temperature (90 K to 100 K) all the isotherms are saturated and the adsorption capacity is governed by pore volume. On the other hand, at room temperature the isotherms closely follow Henry’s law. Modeling of the excess isotherms is also done. Net adsorption isotherms, which can directly indicate the efficiency of porous adsorbent for storage, are also presented. In terms of volumetric efficiency, Mg-DOBDC MOF exhibits best storage capacity out of all the MOFs considered in this study.

Removal of Co(II) from Aqueous Solutions by Pyridine Schiff Base-Functionalized Zirconium-Based MOFs: A Combined Experimental and DFT Study on the Effect of ortho-, meta-, and para-Substitution

“…Metal–organic frameworks (MOFs) are a class of porous materials composed of organic struts joined by inorganic nodes, which were widely used in the fields of gas adsorption, drug transport, catalysis, detection, and separation . Besides, MOFs have been used for the adsorption of heavy metals and radionuclides, such as mercury, lanthanum, and uranium. ,, UiO-66, a zirconium-based MOF, is one of the most stable MOFs with excellent acid–base stability and thermal stability, and its derivative UiO-66–NH 2 has also gained much attention owing to great chemical and thermal stability and facile modifiability. , More and more functional groups were used to modify UiO-66–NH 2 by postsynthetic modification (PSM) to form new functionalized materials for the adsorption of metal ions .…”

“…Metal−organic frameworks (MOFs) are a class of porous materials composed of organic struts joined by inorganic nodes, 20 which were widely used in the fields of gas adsorption, 21 drug transport, 22 catalysis, 23 detection, 24 and separation. 25 Besides, MOFs have been used for the adsorption of heavy metals and radionuclides, such as mercury, lanthanum, and uranium.…”

Alkoxy-Group-Functionalized UiO-66 as Highly Efficient Adsorbents for Hydrogen Chloride Removal from Aqueous Solution

“…Metal–organic frameworks (MOFs) are porous coordination polymers composed of organic linkers and metal ions or clusters to form three-dimensional structures. , Since they can be potentially used for gas storage and separation, sensing, catalysis and energy storage, MOFs have stimulated significant interest. Particularly, MOFs can be used to adsorb contaminants from wastewater. − However, because of the water-unstable coordination bond, most of metal–organic frameworks have limited applications in industry.…”