Construction of Covalent Organic Framework Nanofiber Membranes for Efficient Adsorption of Antibiotics

Small, Год журнала: 2023, Номер 19(26)

Опубликована: Март 21, 2023

Abstract Techniques beyond crystal engineering are critical for manufacturing covalent organic frameworks (COFs) and to explore them advanced applications. However, COFs normally obtained as insoluble, unmeltable, thus nonprocessible microcrystalline powders. Therefore, it is a significant challenge implement into larger architectures structural control on different length scales. Herein, facile strategy presented prepare flexible COF nanofiber membranes by in‐situ growth of polyacrylonitrile (PAN) substrates via reversible polycondensation‐termination approach. The PAN@COF with vertically aligned nanoplates combine large functional surface efficient mass transport, making promising adsorbent, example, water purification. antibiotic pollutant ofloxacin (OFX) removed from superior absorption capacity ≈236 mg g −1 removal efficiency high 98%. here can be extended various Schiff base‐derived materials compositions, providing highly way construct COF‐based several

Язык: Английский

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Solvent‐Free Synthesis of Covalent Organic Framework/Graphene Nanohybrids: High‐Performance Faradaic Cathodes for Supercapacitors and Hybrid Capacitive Deionization

Small, Год журнала: 2023, Номер 20(12)

Опубликована: Ноя. 10, 2023

Abstract Covalent organic frameworks (COFs) with flexible periodic skeletons and ordered nanoporous structures have attracted much attention as potential candidate electrode materials for green energy storage efficient seawater desalination. Further improving the intrinsic electronic conductivity releasing porosity of COF‐based is a necessary strategy to improve their electrochemical performance. Herein, employed graphene conductive substrate in situ grow 2D redox‐active COF (TFPDQ‐COF) redox activity under solvent‐free conditions prepare TFPDQ‐COF/graphene (TFPDQGO) nanohybrids explores application both supercapacitor hybrid capacitive deionization (HCDI). By optimizing hybridization ratio, TFPDQGO exhibits large specific capacitance 429.0 F g −1 due synergistic effect charge transport highway provided by layers abundant centers contained skeleton, assembled TFPDQGO//activated carbon (AC) asymmetric possesses high output 59.4 Wh kg at power density 950 W good cycling life. Furthermore, maximum salt adsorption capacity (SAC) 58.4 mg stable regeneration performance attained TFPDQGO‐based HCDI. This study highlights new opportunities acting high‐performance HCDI materials.

Язык: Английский

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High‐Entropy Engineering Reinforced Surface Electronic States and Structural Defects of Hierarchical Metal Oxides@Graphene Fibers toward High‐Performance Wearable Supercapacitors

Advanced Materials, Год журнала: 2024, Номер 36(35)

Опубликована: Июнь 20, 2024

Abstract Construction advanced fibers with high Faradic activity and conductivity are effective to realize energy density sufficient redox reactions for fiber‐based electrochemical supercapacitors (FESCs), yet it is generally at the sacrifice of kinetics structural stability. Here, a high‐entropy doping strategy proposed develop high‐energy‐density FESCs based on doped metal oxide@graphene fiber composite (HE‐MO@GF). Due synergistic participation multi‐metal elements via doping, HE‐MO@GF features abundant oxygen vacancies from introducing various low‐valence ions, lattice distortions, optimized electronic structure. Consequently, maintains active sites, low diffusion barrier, fast adsorption kinetics, improved conductivity, enhanced stability, Faradaic reversibility. Thereinto, presents ultra‐large areal capacitance (3673.74 mF cm −2 ) excellent rate performance (1446.78 30 mA in 6 M KOH electrolyte. The HE‐MO@GF‐based solid‐state also deliver (132.85 µWh ), good cycle (81.05% capacity retention after 10,000 cycles), robust tolerance sweat erosion multiple washing, which woven into textile power wearable devices (e.g., watch, badge luminous glasses). This provides significant guidance designing innovative materials highlights development next‐generation devices.

Язык: Английский

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Recent advances in two-dimensional polymers: synthesis, assembly and energy-related applications

Chemical Society Reviews, Год журнала: 2024, Номер 53(4), С. 1823 - 1869

Опубликована: Янв. 1, 2024

This review summarizes the advancements of 2D polymers and highlights their unique advantages, focusing on recent research progress in design, synthesis, assembly processing, as well energy-related applications.

Язык: Английский

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Insights into Nano- and Micro-Structured Scaffolds for Advanced Electrochemical Energy Storage

Nano-Micro Letters, Год журнала: 2024, Номер 16(1)

Опубликована: Фев. 23, 2024

Abstract Adopting a nano- and micro-structuring approach to fully unleashing the genuine potential of electrode active material benefits in-depth understandings research progress toward higher energy density electrochemical storage devices at all technology readiness levels. Due various challenging issues, especially limited stability, micro-structured (NMS) electrodes undergo fast performance degradation. The emerging NMS scaffold design is pivotal aspect many as it endows them with both robustness enhancement, even though only occupies complementary facilitating components for main mechanism. However, extensive efforts are urgently needed optimizing stereoscopic geometrical scaffolds minimize volume ratio maximize their functionality fulfill ever-increasing dependency desire power source supplies. This review will aim highlighting these strategies, summarizing corresponding strengths challenges, thereby outlining solutions resolve principles, key perspectives future in this field. Therefore, be one earliest reviews from viewpoint.

Язык: Английский

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Heterointerface regulation of covalent organic framework-anchored graphene via a solvent-free strategy for high-performance supercapacitor and hybrid capacitive deionization electrodes

Materials Horizons, Год журнала: 2024, Номер 11(12), С. 2974 - 2985

Опубликована: Янв. 1, 2024

A 2D redox-active pyrazine-based COF was solvent-free anchored on graphene for heterointerface regulation, displaying exciting energy storage and desalination performances.

Язык: Английский

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Combinatorial Synthesis of Covalent Organic Framework Particles with Hierarchical Pores and Their Catalytic Application

Journal of the American Chemical Society, Год журнала: 2023, Номер 145(35), С. 19283 - 19292

Опубликована: Авг. 16, 2023

Precise tailoring of the aggregation state covalent organic frameworks (COFs) to form a hierarchical porous structure is critical their performance and applications. Here, we report one-pot one-step strategy using dynamic combinatorial chemistry construct imine-based hollow COFs containing meso- macropores. It relies on direct copolymerization three or more monomers in presence two monofunctional competitors. The resulting particle products possess high crystallinity pores, including micropores around 0.93 nm, mesopores widely distributed range 3.1-32 macropores at about 500 while specific surface area could be up 748 m2·g-1, with non-micropores accounting for 60% area. particles demonstrate unique advantages application as nanocarriers situ loading Pd catalysts 93.8% efficiency ethylene carbon monoxide. growth assembly copolymer thus regulated flower-shaped particles, efficiently suppressing fouling reactor. copolymer's weight-average molecular weight melting temperature are also highly improved. Our method provides facile way fabricating pores advanced applications catalysis.

Язык: Английский

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Covalent Organic Frameworks for Capacitive Energy Storage: Recent Progress and Technological Challenges

Advanced Materials Technologies, Год журнала: 2023, Номер 8(8)

Опубликована: Фев. 2, 2023

Abstract Covalent‐organic frameworks (COFs) are emerging organic crystalline materials with a porous framework that extends into two or three dimensions. Originating from their versatile and rigorous synthesis conditions, COFs have abundant tunable pores, large easily accessible surfaces, plenty of redox‐active sites, making them promising material candidates for various energy storage applications. One important area is to serve as capacitive electrode in supercapacitors. This review provides timely comprehensive summary the recent progress design COF‐based COF‐derived The starts brief introduction COFs’ structural features methods. Next, recently reported literature categorized introduced following different mechanisms assembly treatment approaches. Finally, existing challenges future directions realizing practical supercapacitors discussed.

Язык: Английский

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Biocarbon with large specific surface area and tunable pore structure from binary molten salt templating for supercapacitor applications

Chemical Engineering Journal, Год журнала: 2023, Номер 472, С. 144785 - 144785

Опубликована: Июль 17, 2023

Язык: Английский

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Ultralight and Robust Covalent Organic Framework Fiber Aerogels

Small, Год журнала: 2024, Номер 20(32)

Опубликована: Фев. 19, 2024

Abstract Shaping covalent organic frameworks (COFs) into macroscopic objects with robust mechanical properties and hierarchically porous structure is of great significance for practical applications but remains formidable challenging. Herein, a general scalable protocol reported to prepare ultralight pure COF fiber aerogels (FAGs), based on the epitaxial growth synergistic assembly (EGSA) strategy. Specifically, intertwined nanofibers (100–200 nm) are grown in situ electrospinning polyacrylonitrile (PAN) microfibers (≈1.7 µm) containing urea‐based linkers, followed by PAN removal via solvent extraction obtain hollow microfibers. The resultant FAGs possess ultralow density (14.1–15.5 mg cm −3 ) hierarchical porosity that features both micro‐, meso‐, macropores. Significantly, unique interconnected composed endows unprecedented properties, which can fully recover at 50% strain be compressed 20 cycles less than 5% stress degradation. Moreover, exhibit excellent capacity absorption (e.g., chloroform uptake >90 g −1 ). This study opens new avenues design fabrication COFs properties.

Язык: Английский

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