The potential of covalent organic frameworks (COFs) for molecular separations remains unrealized because challenges transforming nanoscale COF materials into large-area functional membranes. Herein, we report the synthesis (64 cm2), ultrathin (24 nm), β-ketoenamine-linked 2D COFs using a facile interfacial polymerization technique. Angstrom-level control over single-digit nanopore size (1.4-2.0 nm) is achieved by direct integration variable-length monomers. We apply these techniques to...

CO₂-selective graphene oxide (GO) nano-composite membranes were prepared for the first time by embedding GO into a commercially available poly(ethylene oxide)–poly(butylene terephthalate) (PEO–PBT) copolymer (PolyActive™).

Despite the exceptional performance of hybrid perovskites in photovoltaics, their susceptibility to ambient factors, particularly humidity, gives rise well-recognized stability issue. In present work, microstripes CH3NH3PbI3 are fabricated on flexible substrates, and they exhibit much larger response relative humidity (RH) levels than continuous films single crystals. The resistance decreases by four orders magnitude changing RH level from 10 95%. Fast recovery time 100 500 ms, respectively,...

Thin film composite membranes were prepared using the blends of graphene oxide and an ionic liquid for efficient CO₂gas capture.

Membranes integrating two-dimensional (2D) materials have emerged as a category with unusual ion transport and potentially useful separation applications in both aqueous nonaqueous systems. The interlayer galleries these membranes drive selectivity, specific properties determined by the chemical structural modifications within inherently different interlayers. Here we report an approach to tuning spacing single source material─exfoliated restacked vermiculite alkanediamine cross-linkers─to...

Membrane fouling in desalination and wastewater treatment increases operating costs energy consumption. Accordingly, research efforts have focused on developing new membrane materials surface treatments that can resist fouling. Due to the case-specific nature of fouling, there is limited quantification impacts these novel anti-fouling membranes water systems. To address this gap, we report results high-level analyses evaluated savings cost, consumption, life-cycle greenhouse gas emissions...

Ceramic membranes are a promising alternative to polymeric for selective separations, given their ability operate under harsh chemical conditions. However, current fabrication technologies fail construct ceramic suitable molecular separations. Herein, we demonstrate molecular-level design of thin-film composite with tunable subnanometer pores precise sieving. Through burning off the distributed carbonaceous species varied dimensions within hybrid aluminum oxide films, created Specifically,...

Mixed matrix membranes containing polybenzimidazole and titania-based fillers with different morphologies are fabricated tested for efficient water vapor/gas separation applications.

Abstract Isoporous block copolymer (BCP) films have received exponential interest as highly selective membranes, stemming from their unique morphological features, but applications in functional devices remain to be realized. Now single‐walled carbon nanotubes (CNTs) were efficiently incorporated into isoporous for chemiresistive sensing at room temperature. Leveraging the efficient charge extraction ability of CNTs together with nanochannel arrays aligned perpendicular surface films, an...

The permeability-selectivity trade-off in polymeric desalination membranes limits the efficiency and increases costs of reverse osmosis nanofiltration systems. Ultrathin contorted polyamide films with enhanced free volume demonstrate an impressive 8-fold increase water permeance while maintaining equivalent salt rejection compared to conventional made m-phenylenediamine trimesoyl chloride monomers. solution-based molecular layer-by-layer (mLbL) deposition technique employed for membrane...

Owing to their unique morphology, isoporous membranes derived from block copolymers (BCPs) have rapidly advanced the process of macromolecular separation. In such separations, fouling is most daunting challenge, affecting both permeability and selectivity high-performance membranes. To overcome this, we increase hydrophilicity nanostructured BCP by incorporating hydrophilic polymer-grafted graphene oxide nanosheets into them. Due synergy these two highly functional components, hybrid show...

Dehumidification is a critical energy-intensive and crucial process for several industries (e.g., air conditioning gas dehydration). Polymeric membranes with high water vapor permeability selectivity are needed to achieve an energy-efficient removal. Herein, we demonstrate high-performance transport based on novel amphiphilic tercopolymers. A series of tercopolymers comprising polyacrylonitrile, poly(ethylene glycol) methyl ether methacrylate (PEGMA), poly(N,N-dimethylamino ethyl...

A novel strategy is developed for fabrication of high-flux isoporous polystyrene membranes from an ordered diblock copolymer by alkaline degradation pathway.

In this work, we report the successful fabrication of CO₂-philic polymer composite membranes using a polyacrylonitrile-r-poly(ethylene glycol) methyl ether methacrylate (PAN-r-PEGMA) copolymer. The series PAN-r-PEGMA copolymers with various amounts PEG content was synthesized by free radical polymerization in presence AIBN initiator and obtained were used for membranes. show high molecular weights range 44⁻56 kDa. We able to fabricate thin film (TFC) dip coating procedure porous PAN support...

Atomic layer deposition (ALD) is a powerful strategy to engineer hybrid organic–inorganic membranes with emergent functionalities. The combination of atomic-level thickness control, wide materials palette, and unprecedented conformality allows the physiochemical properties (e.g., hydrophilicity) mesoporous polymer be precisely tuned. nucleation ALD material growth on surfaces relies Lewis acid–base interactions remains an overlooked motif tremendous potential accelerate growth. Strategies...

A simple strategy for preparation of nanostructured poly(styrene-<italic>b</italic>-methyl methacrylate) (PS-<italic>b</italic>-PMMA) block copolymer membranes <italic>via</italic> state-of-the-art phase inversion technique.

Treatment and reuse of produced water (PW) from oil gas operations could reduce withdrawal in oil- gas-producing regions, but its remains limited because the lack price parity complexity thermally driven solvent-based separation processes required for treating hypersaline PW. More economical desalination PW can potentially be achieved with membrane distillation (MD) if challenges fouling wetting hydrophobic materials overcome, membranes effectively cleaned reused. In this work, we identified...

The removal of toxic heavy metal ions from water resources is crucial for environmental protection and public health. In this study, we address challenge by developing a surface functionalization technique the selective adsorption these contaminants. Our approach involves atomic layer deposition (ALD) followed vapor-phase silanization porous substrates. We utilized silica gel powder (∼100 μm particles, 89 m2/g area, ∼30 nm pores) as an initial substrate. This was first coated with ∼0.5 ALD...

Membranes with tunable, sub-nanometer pores are needed for molecular separations in applications including water treatment, critical mineral extraction, and recycling. Ceramic membranes a promising alternative to the polymeric typically used such due their robust operation under harsh chemical conditions. However, current fabrication technologies fail construct ceramic suitable selective separations. In this presentation, we describe thin film composite (TFC) membrane method that achieves...

Fundamental studies are needed to advance our understanding of selective adsorption in aqueous environments and develop more effective sorbents filters for water treatment. Vapor-phase grafting functional silanes is an method prepare well-defined surfaces study adsorption. In this investigation, we perform vapor phase five different silane compounds on aluminum oxide (Al2O3) prepared by atomic layer deposition. These have the general formula L3Si–C3H6–X where ligand, L, controls reactivity...

Polymer membranes have a wide variety of applications, ranging from water treatment to energy storage. Many these applications require precise control over the membrane porosity and surface chemistry. In this study, we explore modification isoporous polycarbonate (PC) track-etched (PCTEs) by atomic layer deposition (ALD) sequential infiltration synthesis (SIS) tune pore size wall We first performed detailed study Al2O3 ALD SIS in PCTE using situ ex measurements. discovered that short...