ZIF-Derived Nitrogen-Doped Porous Carbons for Xe Adsorption and Separation

Abstract

Currently, finding high capacity adsorbents with large selectivity to capture Xe is still a great challenge. In this work, nitrogen-doped porous carbons were prepared by programmable temperature carbonization of zeolitic imidazolate framework-8 (ZIF-8) and ZIF-8/xylitol composite precursors and the resultant samples are marked as Carbon-Z and Carbon-ZX, respectively. Further adsorption measurements indicate that ZIF-derived nitrogen-doped Carbon-ZX exhibits extremely high Xe capacity of 4.42 mmol g−1 at 298 K and 1 bar, which is higher than almost all other pristine MOFs such as CuBTC, Ni/DOBDC, MOF-5 and Al-MIL-53, and even more than three times of the matrix ZIF-8 at similar conditions. Moreover, Carbon-ZX also shows the highest Xe/N2 selectivity about ~120, which is much larger than all other reported MOFs. These remarkable features illustrate that ZIF-derived nitrogen-doped porous carbon is an excellent adsorbent for Xe adsorption and separation at room temperature.

Xenon Gas Separation and Storage Using Metal-Organic Frameworks

“…Similarly, several papers on covalent organic frameworks and carbon derived from ZIF materials have reported Xe uptake with improved performance over pristine ZIF and other MOF materials. [54][55][56] Different from these classes of materials, chalcogenide aerogels that can be constructed from pairs of chalcogenide clusters (SnS 4…”

Thermally treated zeolitic imidazolate framework-8 (ZIF-8) for visible light photocatalytic degradation of gaseous formaldehyde

“…For example, zeolitic imidazolate framework-8 (ZIF-8), one of the most well-studied MOFs, has been utilized for photocatalytic bacterial disinfection under simulated solar irradiation 18 and degradation of methylene blue dye under UV light irritation. 19 Hierarchical porous ZIF-8 has been readily prepared, 20,21 showing a potential in facilitating pollutant elimination. However, the photocatalytic HCHO degradation by ZIF-8 has been rarely studied.…”

Grand Canonical Monte Carlo Modeling of Anesthetic Xe Separation from Exhale Gas Mixtures Using Metal Organic Frameworks

“…For instance, Panter and Zarabadi-Poo (2018) studied Xe separation from air in several IRMOF materials and results always indicate selective adsorption of Xe over N2 molecules. Zhong et al (2016) investigated the Xe/N2 adsorptionbased separation of adsorption performance of nitrogen-doped porous Carbon material which shows exceptional Xe uptake over N2.…”