A novel covalent functionalization strategy was developed to prepare reproducible ZIF-90 molecular sieve membranes by using 3-aminopropyltriethoxysilane as a linker between the layer and Al2O3 support via imines condensation. The show high thermal hydrothermal stabilities, they allow separation of hydrogen from larger gases sieving.

Inspired by the bioadhesive ability of marine mussel, a simple, versatile, and powerful synthesis strategy was developed to prepare highly reproducible permselective molecular sieve membranes using polydopamine as novel covalent linker. Attributing formation strong noncovalent bonds, ZIF-8 nutrients are attracted bound support surface, thus promoting nucleation growth uniform, well intergrown, phase-pure membranes. The show high hydrogen selectivity thermal stability. At 150 °C 1 bar,...

High hydrogen selectivity and thermal stability are displayed by a membrane of zeolitic imidazolate ZIF-22 grown on porous ceramic supports using 3-aminopropyltriethoxysilane (APTES) as covalent linker (see picture). At 323 K, H2/CO2 7.2 H2 permeance 1.6×10−7 mol m−2 s−1 Pa−1 were achieved.

Through layer-by-layer (LBL) deposition of a graphene oxide (GO) suspension on semicontinuous ZIF-8 layer, we have developed novel bicontinuous ZIF-8@GO membrane. Since only the gaps between crystals are sealed by GO layer due to capillary forces and covalent bonds, gas molecules can permeate through micropore system (0.34 nm). Therefore, membranes show high hydrogen selectivity. At 250 °C 1 bar, mixture separation factors H2/CO2, H2/N2, H2/CH4, H2/C3H8 14.9, 90.5, 139.1, 3816.6, with H2...

MOF constrictor: Covalent modification of a ZIF-90 membrane was achieved by imine condensation the aldehyde groups metal–organic framework (MOF) linker ethanolamine (see picture). The leads to constriction pore apertures and prevents unselective permeation through defect pores, thus improving gas separation performance. For H2/CO2 mixture, selectivity can be increased from 7.3 62.5.

Making use of the preferred adsorption affinity and capacity to CO(2) as well highly porous structure with huge cavities 2.4 nm, a permeable selective ZIF-95 molecular sieve membrane was developed for separation H(2) from CO(2).

The removal of heavy-metal ions from wastewater has drawn intense attention, because their toxicity, bioaccumulation tendency, and persistency in nature. Adsorption is regarded as one the most promising methods, its simplicity efficiency. In present work, we report preparation a novel EDTA-functionalized covalent organic framework (COF) for ions. First, COF named TpPa-NO2 was reduced to TpPa-NH2 by using Na2S2O4 reductant, then EDTA dianhydride grafted onto obtain TpPa-NH2@EDTA through...

The development of highly active carbon-based bifunctional electrocatalysts for both the oxygen evolution reaction (OER) and reduction (ORR) is desired, but still full challenges in rechargeable Zn-air batteries. Metal organic frameworks (MOFs) covalent (COFs) have gained great attention various applications due to their attractive features structural tunability, high surface area porosity. Herein, a core-shell structured hybrid electrocatalyst (H-NSC@Co/NSC), which contains density sites...

A clear separation: post-synthetic functionalization method is reported to obtain a highly permselective zeolitic imidazolate framework (ZIF-90) membrane. The intercrystalline defects of the ZIF-90 membrane are minimized enhance separation selectivity while high permeance maintained. Detailed facts importance specialist readers published as ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by authors. Please note: publisher...

A novel covalent organic framework (COF) IISERP-COOH-COF1 membrane with both high water permeance and ions rejection was developed for desalination through post-modification, which shows superior based on size exclusion.

Inspired by the bio-adhesive ability of marine mussel, highly hydrogen permselective ZIF-8 membranes with a “reinforced concrete” structure were prepared on polydopamine functionalized inexpensive macroporous stainless-steel-nets.

Hohe Wasserstoffselektivität und thermische Stabilität zeichnen eine Membran des zeolithischen Imidazolats ZIF-22 aus, die mithilfe kovalenten Linkers 3-Aminopropyltriethoxysilan (APTES) auf porösen keramischen Trägern abgeschieden wurde (siehe Bild). Bei 323 K wurden H2/CO2-Selektivität von 7.2 H2-Durchlässigkeit 1.6×10−7 mol m−2 s−1 Pa−1 erreicht.

Separation of p-xylene (kinetic diameter ca. 0.58 nm) from its bulkier isomers (o-xylene and m-xylene, 0.68 is challenging, but important in the petrochemical industry. Herein, we developed a highly selective stable metal-organic framework (MOF) MIL-160 membrane for separation by pervaporation. The suitable pore size (0.5∼0.6 selectively allows to pass through, while excluding o-xylene m-xylene. For equimolar binary p-/o-xylene mixtures at 75 °C, high flux 467 g m-2 h-1 selectivity 38.5...

A novel ZIF-100 membrane with high H₂/CO₂ selectivity has been developed on a polydopamine-based alumina support.