3D Covalent Organic Framework Membrane with Interactive Ion Nanochannels for Hydroxide Conduction

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Янв. 15, 2025

Crystalline porous materials, known for their ordered structures, hold promise efficient hydroxide conductivity in alkaline fuel cells with limited ionic densities. However, the rigid cross-linking of materials precludes processing into membranes, while composite membranes diminish materials' advantage due to interrupted phases. Here, we report a self-standing three-dimensional covalent organic framework (3D COF) membrane OH-transport through its interconnected 3D nanochannels. The large-area, homogeneously connected COF membrane, an 8 cm diameter and 20 μm thickness, was prepared using interface polymerization strategy assisted by sacrificial templates polyacrylonitrile membrane. At microscopic level, introduction imidazolium salt-building units resulted noninterpenetrated structure COF, creating interactive continuous hydrophilic channel OH–-conduction. demonstrated high (169 mS/cm at 80 °C, 100% humidity) achieved peak power density 160 mW/cm2 H2/O2 single-cell tests. This brings new possibilities address challenges material formation is expected advance practical applications field ion transport.

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

---

Next-generation stimuli-responsive smart membranes: Developments in oil/water separation

Advances in Colloid and Interface Science, Год журнала: 2025, Номер unknown, С. 103487 - 103487

Опубликована: Март 1, 2025

Язык: Английский

---

Thin-film nanocomposite membranes for water treatment: evolution, applications, challenges, and advancement strategies

Journal of environmental chemical engineering, Год журнала: 2025, Номер unknown, С. 116392 - 116392

Опубликована: Апрель 1, 2025

Язык: Английский

---

Engineered covalent organic frameworks (COFs) for adsorption-based metal separation technologies: A critical review

Advances in Colloid and Interface Science, Год журнала: 2025, Номер unknown, С. 103507 - 103507

Опубликована: Апрель 1, 2025

Язык: Английский

---

Synthetic Strategies to Extended Aromatic Covalent Organic Frameworks

Chemistry - A European Journal, Год журнала: 2024, Номер 30(45)

Опубликована: Май 21, 2024

π-Conjugated materials are highly attractive owing to their unique optical and electronic properties. Covalent organic frameworks (COFs) offer a great opportunity for precise arrangement of building units in π-conjugated crystalline matrix tuning the properties through choice functionalities or post-synthetic modification. With this review, we aim at summarizing both most representative as well emerging strategies synthesis COFs. We give examples direct using large, π-extended blocks. COFs featuring fully conjugated linkages such vinylene, pyrazine, azole discussed. Then, modification methods that result extension COF π-system reviewed. Throughout, mechanistic insights presented when available. In context utilization film devices, conduct concise survey prominent layer deposition techniques reported aptness fused aromatic systems.

Язык: Английский

---

A Cationic Three-Dimensional Covalent Organic Framework Membrane for Nanofiltration of Molecules and Rare Earth Ions

Journal of Membrane Science, Год журнала: 2024, Номер 712, С. 123240 - 123240

Опубликована: Авг. 23, 2024

Язык: Английский

---

Optimizing selectivity via membrane molecular packing manipulation for simultaneous cation and anion screening

Science Advances, Год журнала: 2024, Номер 10(39)

Опубликована: Сен. 25, 2024

Advancing membranes with enhanced solute-solute selectivity is essential for expanding membrane technology applications, yet it presents a notable challenge. Drawing inspiration from the unparalleled of biological systems, which benefit sophisticated spatial organization functionalities, we posit that manipulating arrangement membrane’s building blocks, an aspect previously given limited attention, can address this We demonstrate optimizing face-to-face orientation blocks during assembly covalent-organic-framework (COF) improves ion-π interactions multivalent ions. This optimization leads to extraordinary in differentiating between monovalent cations and anions their counterparts, achieving factors 214 K + /Al 3+ 451 NO 3 − /PO 4 3− . Leveraging attribute, COF facilitates direct extraction NaCl seawater purity 99.57%. These findings offer alternative approach designing highly selective materials, offering promising prospects advancing membrane-based technologies.

Язык: Английский

---

Covalent organic framework-based materials for ion separation: A review

Chemical Engineering Journal, Год журнала: 2024, Номер 504, С. 158745 - 158745

Опубликована: Дек. 18, 2024

Язык: Английский

---

Covalent organic framework membranes for water purification: Current status and future research directions

Separation and Purification Technology, Год журнала: 2024, Номер unknown, С. 130759 - 130759

Опубликована: Ноя. 1, 2024

Язык: Английский

---