Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
Language: Английский
Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(14), P. 8141 - 8149
Published: March 29, 2023
Lithium-sulfur batteries (LSBs) have been considered as a promising candidate for next-generation energy storage devices, which however still suffer from the shuttle effect of intermediate lithium polysulfides (LiPSs). Covalent-organic frameworks (COFs) exhibited great potential sulfur hosts LSBs to solve such problem. Herein, pentiptycene-based D2h symmetrical octatopic polyaldehyde, 6,13-dimethoxy-2,3,9,10,18,19,24,25-octa(4'-formylphenyl)pentiptycene (DMOPTP), was prepared and utilized building block toward preparing COFs. Condensation DMOPTP with 4-connected tetrakis(4-aminophenyl)methane affords an expanded [8 + 4] connected network 3D-flu-COF, flu topology. The non-interpenetrated nature topology endows 3D-flu-COF high Brunauer-Emmett-Teller surface area 2860 m2 g-1, large octahedral cavities, cross-linked tunnels in framework, enabling loading capacity (∼70 wt %), strong LiPS adsorption capability, facile ion diffusion. Remarkably, when used host LSBs, delivers 1249 mA h g-1 at 0.2 C (1.0 = 1675 g-1), outstanding rate capability (764 5.0 C), excellent stability, representing one best results among thus far reported COF-based materials being competitive state-of-the-art inorganic materials.
Language: Английский
Citations
101
Advanced Materials, Journal Year: 2023, Volume and Issue: 35(40)
Published: June 26, 2023
Artificial photosynthetic diluted CO2 reduction directly driven by natural sunlight is a challenging, but promising way to realize carbon-resources recycling utilization. Herein, three-in-one photocatalytic system of enrichment, and H2 O oxidation sites designed for reduction. A Zn-Salen-based covalent organic framework (Zn-S-COF) with reductive synthesized; then, ionic liquids (ILs) are loaded into the pores. As result, [Emim]BF4 @Zn-S-COF shows visible-light-driven -to-CO conversion rate 105.88 µmol g-1 h-1 under (15%) atmosphere, even superior than most photocatalysts in high concentrations . Moreover, also reaches 126.51 5 h. Further experiments theoretical calculations reveal that triazine ring Zn-S-COF promotes activity sites, ILs provide an enriched realizing efficient
Language: Английский
Citations
79
Materials Chemistry Frontiers, Journal Year: 2023, Volume and Issue: 7(16), P. 3298 - 3331
Published: Jan. 1, 2023
This review provides an overview of the recent advances in heterogeneous catalysis using COFs, primarily from 2020 to 2023, covering fundamentals, advantages, current challenges, and future perspectives.
Language: Английский
Citations
64
Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)
Published: Sept. 22, 2023
3D ionic covalent organic framework (COF) membranes, which are envisioned to be able break the trade-off between ion conductivity and selectivity, waiting for exploitation. Herein, we report fabrication of a sulfonic acid-functionalized COF membrane (3D SCOF) efficient selective transport, using dual acid-mediated interfacial polymerization strategy. The SCOF membranes possess highly interconnected transport channels, ultramicroporous pore sizes (0.97 nm), abundant sulfonate groups (with high exchange capacity 4.1 mmol g-1), leading proton 843 mS cm-1 at 90 °C. When utilized in osmotic energy conversion, power density 21.2 W m-2, remarkable selectivity 0.976 thus an exceptional conversion efficiency 45.3% simultaneously achieved. This work provides alternative approach promotes applications COFs separation.
Language: Английский
Citations
63
Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(31)
Published: June 7, 2023
In this work, we innovatively assembled two types of traditional photosensitizers, that is pyridine ruthenium/ferrum (Ru(bpy)32+ /Fe(bpy)32+ ) and porphyrin/metalloporphyrin complex (2HPor/ZnPor) by covalent linkage to get a series dual photosensitizer-based three-dimensional metal-covalent organic frameworks (3D MCOFs), which behaved strong visible light-absorbing ability, efficient electron transfer suitable band gap for highly photocatalytic hydrogen (H2 evolution. Rubpy-ZnPor COF achieved the highest H2 yield (30 338 μmol g-1 h-1 with apparent quantum efficiency (AQE) 9.68 %@420 nm, showed one best performances among all reported based photocatalysts. Furthermore, in situ produced was successfully tandem used alkyne hydrogenation ≈99.9 % conversion efficiency. Theoretical calculations reveal both photosensitizer units MCOFs can be photoexcited thus contribute optimal activity. This work develops general strategy shows great potential using multiple photosensitive materials field photocatalysis.
Language: Английский
Citations
62
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: March 10, 2024
Abstract Covalent organic frameworks (COFs) attract significant attention due to their ordered, crystalline, porous, metal‐free, and predictable structures. These unique characteristics offer great opportunities for the diffusion transmission of photogenerated charges during photocatalysis. Currently, a considerable number COFs are used as metal‐free semiconductor photocatalysts. This review aims understand relationships between structure photocatalysis performance provides in‐depth insight into synthetic strategy improve performance. Subsequently, focuses on structural motif in sustainable photocatalytic hydrogen evolution, carbon dioxide reduction, peroxide generation, compound transformations. Last, conjunction with progress achieved challenges yet be overcome, candid discussion is undertaken regarding field COF photocatalysis, accompanied by presentation potential research avenues future directions. seeks provide readers comprehensive understanding pivotal role robust guidance innovative utilization
Language: Английский
Citations
61
Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)
Published: May 19, 2023
Three-dimensional (3D) covalent organic frameworks (COFs) possess higher surface areas, more abundant pore channels, and lower density compared to their two-dimensional counterparts which makes the development of 3D COFs interesting from a fundamental practical point view. However, construction highly crystalline COF remains challenging. At same time, choice topologies in is limited by crystallization problem, lack availability suitable building blocks with appropriate reactivity symmetries, difficulties structure determination. Herein, we report two pto mhq-z designed rationally selecting rectangular-planar trigonal-planar conformational strains. The show large size 46 Å an extremely low calculated density. net topology solely constructed totally face-enclosed polyhedra displaying precise uniform micropore 1.0 nm. high CO2 adsorption capacity at room temperature can potentially serve as promising carbon capture adsorbents. This work expands accessible topologies, enriching structural versatility COFs.
Language: Английский
Citations
56
Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(11)
Published: Nov. 27, 2023
Abstract Covalent organic frameworks (COFs) are crystalline porous polymers that can be precisely integrated by building blocks to achieve pre‐designed composition, components, and functions, making them a powerful platform for the development of molecular devices in field electrocatalysis. The precise control channel/dopant positions highly ordered network structures COFs provide an ideal material system applications advanced In this paper, topological structure design synthesis methods reviewed detail, their principles deeply analyzed. addition, derivatives electrocatalysis systematically summarized optimization strategies proposed. Finally, application prospects challenges may encountered future prospected, providing helpful guidance research.
Language: Английский
Citations
55
Advanced Materials, Journal Year: 2023, Volume and Issue: 36(1)
Published: Oct. 2, 2023
Covalent organic frameworks (COFs) have shown great advantages as photocatalysts for hydrogen evolution. However, the effect of linkage geometry and type on extent π-electron conjugation in plane framework photocatalytic properties COFs remains a significant challenge. Herein, two Kagome (kgm) topologic oligo(phenylenevinylene)-based are designed synthesized boosting evolution via "two one" strategy. Under visible light irradiation, COF-954 with 5 wt% Pt cocatalyst exhibits high rate (HER) 137.23 mmol g
Language: Английский
Citations
50
Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(28), P. 15473 - 15481
Published: July 8, 2023
Three-dimensional covalent organic frameworks (3D COFs), with interconnected pores and exposed functional groups, provide new opportunities for the design of advanced materials through postsynthetic modification. Herein, we demonstrate successful annulation 3D COFs to construct efficient CO2 reduction photocatalysts. Two COFs, NJU-318 NJU-319Fe, were initially constructed by connecting hexaphenyl-triphenylene units pyrene- or Fe-porphyrin-based linkers. Subsequently, moieties within postsynthetically transformed into π-conjugated hexabenzo-trinaphthylene (pNJU-318 pNJU-319Fe) enhance visible light absorption photoreduction activity. The optimized photocatalyst, pNJU-319Fe, shows a CO yield 688 μmol g-1, representing 2.5-fold increase compared that unmodified NJU-319Fe. Notably, direct synthesis hexabenzo-trinaphthylene-based COF catalysts was unsuccessful due low solubility conjugated This study not only provides an effective method photocatalysts but also highlights unlimited tunability structural
Language: Английский
Citations
47