Robust Bimetallic Ultramicroporous Metal–Organic Framework for Separation and Purification of Noble Gases

Abstract

Noble gases, especially krypton (Kr) and xenon (Xe), are widely applied in diverse fields. Developing new techniques and adsorbents to separate and purify Kr and Xe is in high demand. Herein, we reported a bimetallic metal–organic framework (MOF) (NKMOF-1-Ni) which possesses a narrow pore size (5.36 Å) and ultrahigh stability (e.g., stable in water for 1.5 years). Gas sorption measurements revealed that this MOF possessed much higher uptake for Xe than for Kr, Ar, or N2 at room temperature in all pressure ranges. The calculation of adsorption isosteric heat and Grand Canonical Monte Carlo simulation verified that NKMOF-1-Ni had a stronger interaction with Xe than other tested gases. The results of ideal adsorbed solution theory selectivity and simulated breakthrough further showed that NKMOF-1-Ni had an outstanding separation performance of Xe/Kr, Xe/Ar, and Xe/N2. This study provides important guidance for future research to synthesize ideal sorbents to separate noble gases.

Ultrahigh‐Uptake Capacity‐Enabled Gas Separation and Fruit Preservation by a New Single‐Walled Nickel–Organic Framework

“…[2,3] Thus, the development of energy-efficient C 2 H 4 purification process is among the most essential needs in chemical separations. [4][5][6][7][8] C 2 H 4 also plays a key role in regulating ripening of fruits and vegetables. Slowing down ripening by removing C 2 H 4 can prevent food spoilage during storage and transport.…”

“…[ 2,3 ] Thus, the development of energy‐efficient C 2 H 4 purification process is among the most essential needs in chemical separations. [ 4–8 ]…”

Wet‐Chemistry: A Useful Tool for Deriving Metal–Organic Frameworks toward Supercapacitors and Secondary Batteries

“…[ 24–27 ] In addition, the combination of chemical‐derivation and the subsequent pyrolysis provide a huge imaginary space for material design, and various nanostructures composed of oxides, sulfides, carbides/nitrides, selenides, and phosphides have been reported. [ 28 ] These MOF derivatives show promising applications in gas sorption/separation, [ 29–34 ] biomedicine, [ 35–40 ] catalysis, [ 41–46 ] sensors, [ 47–52 ] and energy storage. [ 53–60 ] Unfortunately, there is still lack of a review article that particularly focuses on the wet‐chemical derivation of MOF crystals.…”

“…[24][25][26][27] In addition, the combination of chemicalderivation and the subsequent pyrolysis provide a huge imaginary space for material design, and various nanostructures composed of oxides, sulfides, carbides/nitrides, selenides, and phosphides have been reported. [28] These MOF derivatives show promising applications in gas sorption/separation, [29][30][31][32][33][34] biomedicine, [35][36][37][38][39][40] catalysis, [41][42][43][44][45][46] sensors, [47][48][49][50][51][52] and energy storage. [53][54][55][56][57][58][59][60] Unfortunately, there is still lack of a review article that particularly focuses on the wet-chemical derivation of MOF crystals.Herein, we aim to give an overview on the recent progress of wet-chemical derivation of MOF crystals via etching, ionexchange, hydrolysis, and chemical transformation, highlight their underlying mechanisms, and introduce a few important energy storage applications, particularly SCs and secondary batteries.…”

Nanochannel {InZn}–Organic Framework with a High Catalytic Performance on CO2 Chemical Fixation and Deacetalization–Knoevenagel Condensation

“…In general, homogeneous catalysts show high catalytic activity under mild conditions, but separation from the products is difficult. , Therefore, the heterogeneous catalysts have attracted considerable attention for CO 2 fixation. Traditional heterogeneous catalysts including metal oxides, ion-exchange resins, polymers, gold nanoparticles, etc., − can fulfill the catalyst separation problem but are often restricted by their harsh reaction conditions and high cost. , In recent years, MOF materials have attracted much attention for their high specific surface area and micropores, ordered porous structures, and high adsorption capacity, which render them a variety of catalytic properties and applications in many organic reactions, such as the cycloaddition reaction of CO 2 with epoxides and the Knoevenagel condensation reaction. − However, it is still a challenge to construct functional porous MOFs with enough size to allow guest molecules to enter and exit freely, which is subject to the deployment of ingredients and the precise regulation of the growth environment.…”