Donor–acceptor sp² covalent organic frameworks for photocatalytic H₂O₂ production and tandem bisphenol-A degradation

Green Chemistry, Год журнала: 2024, Номер 26(6), С. 3239 - 3248

Опубликована: Янв. 1, 2024

Covalent organic frameworks are tunable photocatalysts. We synthesized donor–acceptor COFs and obtained a photocatalytic H 2 O production rate of 1952 μmol g −1 h in pure water rapid degradation bisphenol A by double action (photocatalytic situ ).

Язык: Английский

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Tetrazine‐Linked Covalent Organic Frameworks With Acid Sensing and Photocatalytic Activity

Advanced Materials, Год журнала: 2023, Номер 36(14)

Опубликована: Дек. 23, 2023

Abstract The first synthesis and comprehensive characterization of two vinyl tetrazine‐linked covalent organic frameworks (COF), TA‐COF‐1 TA‐COF‐2, are reported. These materials exhibit high crystallinity specific surface areas 1323 1114 m 2 g −1 . COFs demonstrate favorable band positions narrow gaps suitable for light‐driven applications. advantages enable TA‐COFs to act as reusable metal‐free photocatalysts in the arylboronic acids oxidation light‐induced coupling benzylamines. In addition, these show acid sensing capabilities, exhibiting visible reversible color changes upon exposure HCl solution, vapor, NH 3 vapor. Further, outperform a wide range previously reported COF photocathodes. tetrazine linker skeleton represents significant advancement field synthesis, enhancing separation efficiency charge carriers during photoreaction contributing their photocathodic properties. can also degrade 5‐nitro‐1,2,4‐triazol‐3‐one (NTO), an insensitive explosive present industrial wastewater, 20 min sunlight‐driven photocatalytic process; thus, revealing dual functionality protonated both photodegradation Brønsted catalysts. This pioneering work opens new avenues harnessing potential COF‐based materials, facilitating advances catalysis, sensing, other related fields.

Язык: Английский

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Ionic liquid/covalent organic framework/silica composite material: Green synthesis and chromatographic evaluation

Analytica Chimica Acta, Год журнала: 2023, Номер 1283, С. 341992 - 341992

Опубликована: Ноя. 1, 2023

Язык: Английский

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3D Covalent Organic Frameworks from Design, Synthesis to Applications in Optoelectronics

Small, Год журнала: 2023, Номер 20(18)

Опубликована: Дек. 6, 2023

Covalent organic frameworks (COFs), a new class of crystalline materials connected by covalent bonds, have been developed rapidly in the past decades. However, research on COFs is mainly focused two-dimensional (2D) COFs, and three-dimensional (3D) still initial stage. In 2D bonds exist only flakes can form 1D channels, which hinder charge transport to some extent. contrast, 3D more complex pore structure thus exhibit higher specific surface area richer active sites, greatly enhance carrier transport. Therefore, compared stronger applicability energy storage conversion, sensing, optoelectronics. this review, it first introduced design principles for particular summarize development conjugated building blocks with special focus their application Subsequently, preparation COF powders thin films methods improve stability functionalization are summarized. Moreover, applications electronics outlined. Finally, conclusions future directions presented.

Язык: Английский

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Superhydrophilic covalent organic frameworks accelerate photocatalytic production of hydrogen peroxide through proton channels

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(22), С. 13116 - 13126

Опубликована: Янв. 1, 2024

Superhydrophilic COFs with D–A structure accelerate photocatalytic synthesis of H 2 O using water as a proton supply reservoir.

Язык: Английский

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Carbazole-containing covalent triazine frameworks for efficient hydrogen peroxide photosynthesis from natural sunlight

Chemical Engineering Journal, Год журнала: 2024, Номер 490, С. 151332 - 151332

Опубликована: Апрель 16, 2024

Язык: Английский

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Atomically Precise Regulation of the N-Heterocyclic Microenvironment in Triazine Covalent Organic Frameworks for Coenzyme Photocatalytic Regeneration

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(30), С. 21025 - 21033

Опубликована: Июль 18, 2024

Artificial photosynthesis represents a sustainable strategy for accessing high-value chemicals; however, the conversion efficiency is significantly limited by its difficulty in cycle of coenzymes such as NADH. In this study, we report series isostructural triazine covalent organic frameworks (COFs) and explore their N-substituted microenvironment-dependent photocatalytic activity NADH regeneration. We discovered that rational alteration N-heterocyclic species, which are linked to center through an imine linkage, can regulate both electron band structure planarity COF layer. This results different separation efficiencies photoinduced electron-hole pairs transfer behavior within between individual layers. The optimal catalyst herein achieves regeneration capacity 89% 20 min, outperforming most reported nanomaterial photocatalysts. Based on this, artificial system constructed green synthesis compound,

Язык: Английский

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Hierarchically Porous and Hetero‐Structured Black Phosphorus/Ti₃C₂T_X MXene Aerogel Fiber for Wearable Supercapacitors with Implantable Capability

Advanced Functional Materials, Год журнала: 2024, Номер 34(51)

Опубликована: Авг. 22, 2024

Abstract Architected fibrous electrodes with hierarchically porous, stable interface coupling, and good biocompatibility that accelerates charge transfer storage are vital to realize high‐performance fiber‐shaped supercapacitors (FSCs) toward wearable implantable systems. Here, a porous hetero‐structured black phosphorus/Ti 3 C 2 T X MXene aerogel (A‐BP/Ti ) fiber based on electrostatic self‐assembly microfluidic spinning methods is reported. The as‐prepared A‐BP/Ti interconnected networks, high conductive skeleton, substantial interfacial building exhibits low diffusion energy barrier of H + , the large adsorption fast electron conduction, excellent structural stability by density functional theory calculations in situ/ex situ characteristics. As result, presents boosted electrolyte ion kinetic capacitance 369 F g −1 . Furthermore, asymmetric FSCs deliver 6.39 Wh kg long cycling 20 000 cycles, thereby successfully powering devices. More importantly, combining hydrogel adhesion agent, can firmly adhere tissues show significant bending (88.52% retention after 5000 cycles), impressively adhesive capability tissue fluid or wetted surface, considerably no cell toxic. work offers broad path for designing technology applications.

Язык: Английский

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Donor–acceptor covalent organic frameworks-confined ultrafine bimetallic Pt-based nanoclusters for enhanced photocatalytic H2 generation

Nano Research, Год журнала: 2024, Номер 17(7), С. 5835 - 5844

Опубликована: Март 7, 2024

Язык: Английский

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Photons, Excitons, and Electrons in Covalent Organic Frameworks

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(47), С. 32161 - 32205

Опубликована: Ноя. 18, 2024

Covalent organic frameworks (COFs) are created by the condensation of molecular building blocks and nodes to form two-dimensional (2D) or three-dimensional (3D) crystalline frameworks. The diversity with different properties functionalities large number possible framework topologies open a vast space well-defined porous architectures. Besides more classical applications materials such as absorption, separation, catalytic conversions, interest in optoelectronic COFs has recently increased considerably. electronic both their linkage chemistry can be controlled tune photon absorption emission, create excitons charge carriers, use these carriers photocatalysis, luminescence, chemical sensing, photovoltaics. In this Perspective, we will discuss relationship between structural features properties, starting connectivity, layer stacking 2D COFs, control over defects morphology including thin film synthesis, exploring theoretical modeling structural, electronic, dynamic discussing recent intriguing focus on photocatalysis photoelectrochemistry. We conclude some remarks about present challenges future prospects powerful architectural paradigm.

Язык: Английский

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