ZIF‐8 Membrane Permselectivity Modification by Manganese(II) Acetylacetonate Vapor Treatment

Abstract

Vapor‐phase treatment of ZIF‐8 membranes with manganese(II) acetylacetonate (Mn(acac)2) allows permselectivity tuning. Propylene/propane selectivity increases from 31 to 210 after the Mn(acac)2 treatment at 165 °C for 30 min, while selectivities increase from 14.6 to 242 for H2/CH4, from 2.9 to 38 for CO2/CH4, from 2.4 to 29 for CO2/N2, and from 2.9 to 7.5 for O2/N2, after Mn(acac)2 treatment at 175 °C for 30 min. Stable equimolar propylene/propane mixture selectivity of 165 at ambient temperature and 4 bar equimolar feed with a propylene flux of 8.3×10−4 mol m−2 s−1 is established. A control experiment excludes thermal treatment alone causing these changes. XPS analysis reveals the presence of Mn(acac)2 on the outer surface of the vapor‐treated ZIF‐8 membranes while no other changes are detectable by X‐ray diffraction and infrared spectroscopy.

Highly Breathable Chemically Protective MOF‐Fiber Catalysts

“…[6,7] MOFs have more attractive features than traditional porous solids because of their high surface areas, adjustable pore structures, and facile functionalization. With the intrinsic structural advantages and flexible tunability by posttreatment [8] in their physical and chemical properties, MOFs have a considerable potential for a wide range of applications, including gas storage and separation, [9] sensing, [10] catalysis, [11] drug delivery, [12] and antimicrobial systems. [13] In addition, MOFs have been recently spotlighted as a unique platform to efficiently deactivate highly toxic chemical warfare agents (CWAs), including organophosphorus nerve agents, VX and soman (GD), as well as to capture toxic industrial chemicals and volatile organic compounds.…”

Tailoring the Void Space Using Nanoreactors on Carbon Fibers to Confine SnS2 Nanosheets for Ultrastable Lithium/Sodium‐Ion Batteries

“…The high‐resolution C 1s spectrum in Figure a shows three peaks at 284.8, 286.3, and 287.8 eV, corresponding to CC, CN, and CO bonds, respectively. [ 35,39 ] The presence of CN derives from the N‐doped carbon nanofibers, which can be further demonstrated by N 1s spectrum (Figure 4b). The N 1s peaks at 398.4 and 400.2 eV are ascribed to the pyridinic N and pyrrolic N. [ 40 ] Note that the dominance of pyridinic N and pyrrolic N is beneficial to enhancing the conductivity of SnS 2 @C/CNF film electrode and wettability of the electrolyte.…”

Integration of a Metal–Organic Framework Film with a Tubular Whispering-Gallery-Mode Microcavity for Effective CO2 Sensing

“…The Zn 2p peaks can be further deconvoluted into two sub-peaks corresponding to Zn–O and Zn–N bonds, which is consistent with the ZIF-8 structure. Moreover, Figure S9 exhibits the high-resolution C1s spectrum, and it can be deconvoluted into two sub-peaks, respectively, related to the C/CC/C–H bond and the C–N/CN bond in 2-MI . In addition, ESR spectroscopy was used to explore the oxygen vacancies in PF-MC.…”

“…Moreover, Figure S9 exhibits the high-resolution C1s spectrum, and it can be deconvoluted into two sub-peaks, respectively, related to the C/CC/C−H bond and the C− N/CN bond in 2-MI. 62 In addition, ESR spectroscopy was used to explore the oxygen vacancies in PF-MC. As shown in Figure S10, the ESR spectrum proves the existence of oxygen vacancies, which create enormous Lewis acid sites and remarkably enhance the gas adsorption ability.…”