Graphene oxide (GO) membranes have been attracting numerous attention due to their impressive performance in various applications, especially water purification. However, because the swelling and polar organic solvents causes increase of interlayer channels, GO usually possess inferior rejection for subnanometer-sized molecules. How control transport channels at angstrom level is a significantly scientific practical issue. Herein, concept external pressure regulation (EPR) reported...

In this work, a versatile postmodification strategy based polydopamine (PDA) grafting is reported for improving CO2 separation performance of MOF membranes. Owning to the strong bioadhesion, PDA can be deposited on UiO-66 membrane through simple and mild process. Since impregnation in invalid nanometer-sized pinholes grain boundaries suppress nonselective gas transports, modified PDA/UiO-66 exhibits significantly enhanced CO2/N2 CO2/CH4 selectivities 51.6 28.9, respectively, which are 2-3...

A solvent-free strategy of vapor-phase linker exchange is developed for postsynthetic modification metal-organic frameworks.

Two-dimensional (2D) metal-organic framework (MOF) membranes are considered potential gas separation of the next generation due to their structural diversity and geometrical functionality. However, achieving a rational structure design for 2D MOF membrane understanding impact nanosheet stacking modes on performance remain challenging tasks. Here, we report novel kind based [Cu2 Br(IN)2 ]n (IN=isonicotinato) nanosheets propose that synergetic have significant influence performance. The is...

Ultra-selective MOF membranes with controllable thickness down to 130 nm were prepared on discs and fibers by sol–gel asynchronous crystallization.

The solvent-free chemical vapor crosslinking can directly fix the interlayer spacing of GO membranes for better water treatment.

Two-dimensional (2D) metal-organic framework (MOF) nanosheet membranes hold promise for exact molecular transfer due to their structural diversity and well-defined in-plane nanochannels. However, achieving precise regulation of stacking modes between neighboring nanosheets in membrane applications understanding its influence on separation performance remains unrevealed challenging. Here, we propose a strategy accurately controlling the MOF via linker polarity regulation. Both theoretical...

Abstract Metal–organic framework (MOF) membranes are attracting numerous attentions recently. However, fabrication of ultrathin and precisely molecular sieving MOF membranes, especially with highly processable polymeric hollow fiber substrates, is a great challenge. Here, the defect‐free ZIF‐8 composite impressive performance for hydrogen permselectivity fabricated by novel interfacial contra‐diffusion synthesis. The reduced graphene oxide (rGO) good selectivity prepared on substrates via...

Non-swelling sandwich graphene oxide hollow fiber membranes with a confined interlayer spacing of 0.86 nm and ultrahigh stability in water purification were developed for sharp ion sieving.

Abstract In this study, we report a novel air–water interfacial self‐crystallization (AWISC) method for scalable depositing continuous metal–organic framework (MOF) layers on modification‐free polyvinylidene fluoride (PVDF) hollow fibers. Through importing MOF precursors into porous fiber substrates with outer diameters of 1.2 mm and evaporating aqueous solutions under mild conditions, the metal ions linkers close to solution surface can be concentrated firstly, thus crystallization MOFs...

Abstract The controlling filler aggregation and strengthening interfacial interaction are of great scientific significance for mixed matrix membranes (MMMs). In this study, the polymer‐embedded metal‐organic framework (pMOF) microspheres (MSs) designed by one‐pot synthesis employed as microfillers improving separation performance MMMs. Through adding polymer during solvothermal crystallization, chains embedded into MOF materials, morphologies MOFs transformed from nanopaticles to...

MOF membranes exhibit impressive performance in gas separation due to their large surface area, controllable pore size and unique affinity. Here, the ultrathin UiO-66-NH2 polycrystalline with thickness of ∼320 nm are successfully prepared within 1 h using a combination ultrasound-assisted microwave synthesis strategies. During reaction, high-density small nuclei produced by sodium formate ultrasound-assisted, which act as sufficient nucleation sites for heterogeneous during membrane growth,...

Gas-liquid interfaces with unique physicochemical properties have great potential for the self-assembly of many materials. Herein, a concept autonomous self-crystallization MOF films at air-water is reported. The free-standing ZIF-8 large area about 20 cm2 can be preferentially assembled only water surface. Under influence atomically well-defined and amphiphilic interface on anisotropically polar linkers, thus-prepared exhibit highly out-of-plane orientation smooth-rough Janus crystalline facets.

Abstract Two‐dimensional (2D) metal–organic framework (MOF) membranes are considered potential gas separation of the next generation due to their structural diversity and geometrical functionality. However, achieving a rational structure design for 2D MOF membrane understanding impact nanosheet stacking modes on performance remain challenging tasks. Here, we report novel kind based [Cu 2 Br(IN) ] n (IN=isonicotinato) nanosheets propose that synergetic have significant influence performance....

In this paper, used polyvinyl alcohol as dispersing agent, Benzoyl peroxide initiator of polymerization, Divinyl benzene cross-linking Styrene and 2-Methylpropenoic acid monomer, ion exchange resin (copolymer St-DVB-MAA)were prepared by suspension polymerization on 80°C. The structures, components properties the composite micro gels were characterized Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA). experiment was conducted to deal with copper ions in...

The controlling nanofiller aggregation and strengthening interfacial interaction are of great scientific significance for mixed matrix membranes (MMMs). In this study, the polymer-embedded metal-organic framework (pMOF) microspheres (MSs) designed by one-pot synthesis employed as microfillers improving separation performance MMMs. Through adding polymer during solvothermal crystallization, chains embedded into MOF materials, morphologies MOFs transformed from nanopaticles to polycrystalline...

The Metal-Organic Framework (MOF) materials are ideal molecular sieving membrane due to the regular pores with high-density and good designability, which have been widely studied in gas separation, desalination, nanofiltration, etc. However, most preparation methods of MOF polycrystalline membranes always time-consuming as-synthesized thick. Here this work, ultrathin 210 nm-UiO-66 rapidly synthesized 1 hour, where sonication is utilized generate massive tiny nucleation followed rapid...