Desalination, Journal Year: 2025, Volume and Issue: unknown, P. 118783 - 118783
Published: March 1, 2025
Language: Английский
Nanomaterials, Journal Year: 2024, Volume and Issue: 14(6), P. 522 - 522
Published: March 14, 2024
Carbon nanomaterials are promising adsorbents for dye removal from wastewater also due to their possible surface functionalization that, in principle, can increase the adsorption rate and provide regeneration. To investigate real advantages of functionalization, we synthesized characterized through IR, TGA, TEM, XPS DLS measurements a multi-walled carbon nanotube (MWCNT) derivative bearing benzenesulfonate groups (MWCNT-S). The obtained material demonstrated have good dispersibility water better capability adsorb methylene blue (MB) compared pristine MWCNT adsorbent. Adsorption kinetic studies showed very fast process, with constant significantly higher respect not only that unfunctionalized adsorbent but those widely used activated carbons. Moreover, capacity MWCNT-S is more than doubled insoluble adsorbent, thanks derivatives, providing larger available surface, electrostatic interactions between cationic MB anionic sulfonate groups. Additionally, reversibility ionic disclosed possibility release adsorbed pollutant competition salts, regenerating recovering dye. Indeed, by treating 1 h M NaCl, regeneration 75% was obtained, demonstrating validity this strategy.
Language: Английский
Citations
24
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(49)
Published: Aug. 17, 2024
Abstract Covalent organic frameworks (COFs) are a promising class of polymers with the merits robust framework, ultrahigh porosity, and molecularly precise backbones, which reveals great potential for solar‐to‐chemical energy conversion in context mitigating environmental crises. However, photochemical activities individual COFs not as desired, primarily due to their limited light absorption, insufficient dissociation photogenerated excitons readily recombined carriers. Recently, COFs‐based metal‐free heterojunctions synergistic effects provide feasible route boost photocatalytic activity more environmentally friendly cost‐competitive manners. Herein, it is first systematically overview advances from heterojunction types, heterointerfaces interactions, primary design mechanisms. Then, typical photocatalysts (e.g., g‐C 3 N 4 ‐COFs, carbon materials‐COFs, polymer semiconductor‐COFs, COFs‐COFs heterojunction) summarized. Finally, challenges long‐term outlooks future offered terms efficiency, yield, stability, cost reaction mechanisms, well standardized evaluation method activities. It anticipated that this review can deliver new insights into fundamental engineering conversion, further accelerate development area.
Language: Английский
Citations
18
Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: 13(2), P. 115660 - 115660
Published: Jan. 30, 2025
Language: Английский
Citations
2
Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 493, P. 152759 - 152759
Published: June 1, 2024
Language: Английский
Citations
15
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 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.
Language: Английский
Citations
1
Macromolecules, Journal Year: 2024, Volume and Issue: 57(12), P. 5892 - 5901
Published: June 12, 2024
One-dimensional ultrathin organic nanotubes (UTONTs) are of favorable potential as absorbents due to their hollow nanostructures, high-aspect-ratio, large specific surface area, and tailorable functions. However, the development polymer-based stimuli-responsive UTONTs for highly efficient controllable removal pollutants remains challenging. Herein, we report self-assembly side-chain amphiphilic alternating azocopolymers generate cationic photoresponsive polymer (UTPNTs) with an average diameter ∼548 nm a tubular wall thickness ∼2.8 nm. Owing photoisomerization azobenzene units, reversible transformation from UTPNTs vesicles (UTPVs, vesicular 2.4 nm, 115 nm) was achieved upon alterative irradiation UV visible light, proving attractive feature. The proof-of-concept adsorption performance both UTPVs evaluated toward anionic dye Congo red, photocontrollable activity that dependent on structures electrostatic interactions. as-prepared exhibited capacity, amount 1248.3 mg·g–1 short equilibrium time ∼6 min, greater than (638.2 mg·g–1). Our work provides simple strategy generating desirable performance.
Language: Английский
Citations
8
Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(5), P. 113658 - 113658
Published: July 25, 2024
Language: Английский
Citations
7
Chemistry - A European Journal, Journal Year: 2024, Volume and Issue: 30(45)
Published: May 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.
Language: Английский
Citations
6
Journal of Membrane Science, Journal Year: 2024, Volume and Issue: 711, P. 123171 - 123171
Published: Aug. 6, 2024
Language: Английский
Citations
6
Science Advances, Journal Year: 2024, Volume and Issue: 10(39)
Published: Sept. 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.
Language: Английский
Citations
5