Covalent Organic Frameworks for Membrane Separation

Advanced Science, Год журнала: 2024, Номер unknown

Опубликована: Дек. 11, 2024

Membranes with switchable wettability, solvent resistance, and toughness have emerged as promising materials for separation applications. However, challenges like limited mechanical strength, poor chemical stability, structural defects during membrane fabrication hinder their widespread adoption. Covalent organic frameworks (COFs), crystalline constructed from molecules connected by covalent bonds, offer a solution due to high porosity, customizable properties. The ordered structures functionality provide COFs lightweight framework, large surface area, tunable pore sizes, which attracted increasing attention applications in separations. Recent research has extensively explored the preparation strategies of COF membranes various processes. This review uniquely delves into influence techniques, including interfacial polymerization, layer-by-layer assembly, situ growth, on thickness performance. It comprehensively explores design potential these methods, particular focus gas separation, oil/water nanofiltration. Furthermore, future opportunities, within this field, directions development are proposed.

Язык: Английский

---

Adsorptive nanofibrous membranes for bidirectional removal of cationic and anionic dyes

Separation and Purification Technology, Год журнала: 2025, Номер unknown, С. 131515 - 131515

Опубликована: Янв. 1, 2025

Язык: Английский

---

Recent advances in the synthesis of covalent organic framework-based membranes and their applications for liquid-based separation

TrAC Trends in Analytical Chemistry, Год журнала: 2025, Номер unknown, С. 118167 - 118167

Опубликована: Янв. 1, 2025

Язык: Английский

---

Insights into pore engineering of covalent organic framework membranes for small molecule separation

Chemical Engineering Journal, Год журнала: 2025, Номер 509, С. 161210 - 161210

Опубликована: Март 4, 2025

Язык: Английский

---

In-situ construction of covalent organic frameworks membrane via interfacial polymerization and crosslinking modification using trimesoyl chloride for organic solvent nanofiltration

Separation and Purification Technology, Год журнала: 2024, Номер 350, С. 127945 - 127945

Опубликована: Май 13, 2024

Язык: Английский

---

3D-/2D-Covalent Organic Framework (COF) Bilayered Membranes for Efficient Pharmaceutical Purification

Journal of Membrane Science, Год журнала: 2024, Номер 709, С. 123144 - 123144

Опубликована: Июль 29, 2024

Язык: Английский

---

Ultrasonic-assisted nanofiltration separation recovering salvianolic acid B from ethanol wastewater

Ultrasonics Sonochemistry, Год журнала: 2024, Номер 108, С. 106967 - 106967

Опубликована: Июнь 22, 2024

The transformation of salvianolic acid B brought on by heat treatment recovery ethanol eluent, which is a difficult problem in pharmaceutical technology, affects the purity raw material when medicinal purified resin. Ultrasonic-assisted nanofiltration separation (UANS) was first employed to improve efficiency resource utilization regulating rejection and separating rosmarinic from organic wastewater. related three variables: ultrasonic power, pH, concentration. But there were differences effects variables rejections acid. showed decreasing trend with an increase power or decrease pH; however, concentration increased 5 % 35 %, 84.96 96.60 decreased 35.09 17.51 %. On basis response surface methodology (RSM), optimal UANS parameters for solution conditions involving different concentrations are as follows: 10 (ultrasonic 500 W pH 6.15), 20 6.54), 30 460 6.34). molecular proportions 10.75 7.13 8.27 wastewater, while 40.52 33.83 69.87 respectively. And recoveries wastewater 93.56 95.04 97.30 respectively, 3.19 2.27 0.56 proportion correlated exponentially. In comparison conventional (CNS), able resolve conflict between well enhance recycling prevent pollution environment Experiments using at intensities suggest that intensity 46-50 W/L density 0.92-1.00 W/cm

Язык: Английский

---

A Responsive 3D Covalent Organic Framework Membrane with Tunable Pore Sizes for Molecular Sieving

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 8, 2025

Abstract 3D covalent organic framework (3D COF) membranes with sub‐nanometer pore sizes and continuous channels offer a promising route for efficient molecular sieving. Nevertheless, fine‐tuning the of dense COF membranes, especially those based on identical monomer compositions, presents significant challenge. Herein, an effective facile interfacial reaction strategy is developed to fabricate 320 variable sizes. By simply changing composition dual acids, both structure membrane assembly process are regulated, enabling control over thicknesses. The exhibited high solvent permeance could efficiently separate molecules similar weights. Moreover, further investigations revealed that as‐prepared solvent‐responsive, enlarging their intrinsic when exposed methanol. varying ratio water methanol, facilitate graded sieving complex dye mixtures, achieving solute‐solute separation.

Язык: Английский

---

Organocatalytic glycolysis of polyethylene terephthalate and product separation by membrane filtration

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162400 - 162400

Опубликована: Апрель 1, 2025

Язык: Английский

---

Mass Transport Based on Covalent Organic Frameworks

Accounts of Chemical Research, Год журнала: 2025, Номер unknown

Опубликована: Апрель 11, 2025

ConspectusMass transport is fundamental to biological systems and industrial processes, governing chemical reactions, substance exchange, energy conversion across various material scales. In systems, ion transport, such as proton migration through voltage-gated channels, regulates cellular potential, signaling, metabolic balance. transporting molecules solid, liquid, or gas phases dictates reactant contact diffusion rates, directly impacting reaction efficiency conversion. Optimizing these processes necessitates the design of efficient interfaces channels enhance mass transport.Crystalline porous materials, particularly covalent organic frameworks (COFs), offer an excellent platform for investigating optimizing transport. With ordered, pre-engineered nano- subnanometer pores, COFs enable confined garnered significant attention conversion, catalysis, drug delivery, adsorption, separation applications. Deeper investigations into mechanism in at molecular level are crucial advancing materials science, chemistry, engineering.Our group focuses on explore multisubstance cooperative mechanisms structure-activity relationships ions, water, gases. We have expanded linker chemistry by developing irreversible α-aminoketone-linked introducing Suzuki coupling COF preparation. proposed strategies side-chain-induced dipole-facilitated stacking prenucleation slow growth achieve record large pore sizes highly oriented nanochannels. implemented exfoliation interwoven strategy accelerate complex interfaces, refined permeability sieve-based membranes precise size engineering, elucidated effects hydrophobicity/hydrophilicity water phase transition diffusion. Building insights, we designed novel open framework ionomers tailor microenvironment electrocatalytic uncovered multiple mechanisms. The synergistically enhanced three-phase effectively modulates electrochemical CO2 reduction pathway significantly boosts power density proton-exchange membrane fuel cells (PEMFCs).In this Account, summarize recent advances COF-based emphasizing nanochannel construction strategies, including linkage, size, orientation, function gradient modulations. discuss functional COFs, correlations between structure properties, their applications separation, storage, catalysis. Finally, outline current challenges future opportunities synthetic mechanisms, By understanding phenomena from microscopic particles macroscopic scales, Account aims provide aligning with offering insights catalytic performance.

Язык: Английский

---