Covalent Organic Frameworks Enable Sustainable Solar to Hydrogen Peroxide

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(12)

Published: Dec. 6, 2023

Abstract As a chemical product with rapidly expanding demand in the field of modern energy and environmental applications, hydrogen peroxide (H 2 O ) has garnered widespread attention. However, existing industrial production H is plagued by high consumption, harmful waste emission, severe safety issues, making it difficult to satisfy environmental/economic concept. Artificial photosynthesis offers viable strategy for green sustainable since uses sunlight as an source initiate reaction oxygen water produce . Among various photocatalysts, covalent organic frameworks (COFs), featuring highly ordered skeletons well‐defined active sites, have emerged promising photocatalysts production. This review presents nascent burgeoning area photocatalytic based on COFs. First, brief overview technology provided, followed detailed introduction principles evaluation generation. Subsequently, latest research progress judicious design COFs expounded, particular emphasis manipulating electronic structures redox sites. Finally, outlook challenges future opportunities proposed, hope stimulating further explorations novel molecular‐designed photosynthesis.

Language: Английский

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Clean Production of Hydrogen Peroxide: A Heterogeneous Solar‐Driven Redox Process

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(36)

Published: Aug. 6, 2023

Abstract Hydrogen peroxide is an essential chemical that attracting strong attention for energy and environmental applications. However, the struggle between growing market demand unsustainability of conventional anthraquinone method motivates exploration alternative H 2 O production processes. Although several new processes have been proposed, environmental‐friendly solar‐driven attracts most because only inputs water, oxygen, light energy. The rational design functional photo‐responsive catalysts promotes in photocatalytic photoelectrocatalytic approaches. These are, general, achieved by facilitating preferential adsorption key intermediates OOH*/OH*/O*, enhancing absorption, promoting charge separation, accelerating surface transfer with selective number involved charges. This review systematically summarizes strategies photo(electro)catalysts toward via both water oxidation oxygen reduction pathways. Though route perceived as more popular community, emerging a convincing alternative. Furthermore, prevailing hypotheses, state‐of‐the‐art catalysts, critical challenges, perspectives are discussed depth. aims to enhance comprehension this research field promote interest sustainable production.

Language: Английский

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Structural Motifs in Covalent Organic Frameworks for Photocatalysis

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

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Photo‐Driven Quasi‐Topological Transformation Exposing Highly Active Nitrogen Cation Sites for Enhanced Photocatalytic H₂O₂ Production

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(50)

Published: Nov. 7, 2023

Herein, the exposure of highly-active nitrogen cation sites has been accomplished by photo-driven quasi-topological transformation a 1,10-phenanthroline-5,6-dione-based covalent organic framework (COF), which contributes to hydrogen peroxide (H2 O2 ) synthesis during 2-electron photoreduction. The exposed with photo-enhanced Lewis acidity not only act as electron-transfer motor adjust inherent charge distribution, powering continuous and stable separation, broadening visible-light adsorption, but also providing large number active for adsorption. optimal catalyst shows high H2 production rate 11965 μmol g-1 h-1 under visible light irradiation remarkable apparent quantum yield 12.9 % at 400 nm, better than most previously reported COF photocatalysts. This work provides new insights designing photo-switchable catalytic centers toward efficient solar chemical energy conversion.

Language: Английский

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Interface Chemical Bond Enhanced Ions Intercalated Carbon Nitride/CdSe‐Diethylenetriamine S‐Scheme Heterojunction for Photocatalytic H₂O₂ Synthesis in Pure Water

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(24)

Published: Feb. 19, 2024

Abstract Photosynthesis of hydrogen peroxide (H 2 O ) is regarded as an economically efficient and environmentally friendly synthesis method. However, the scalability photocatalytic H production (PHP) hindered by sluggish reaction kinetics rapid recombination photogenerated charge carriers. In this study, organic amine‐constrained ions intercalated carbon nitride/CdSe‐diethylenetriamine (K + /I − ‐CN/CdSe‐D) S‐scheme heterojunction synthesized using organic–inorganic hybrid approach employed for PHP first time. The optimization interface I K contributed to enhanced light absorption capabilities reduced interlayer transfer distance. Concurrently, synergy C─Se bonds at effectively modulated electron pathways. coordination environment mechanism are thoroughly investigated extended X‐ray fine structure in situ irradiated photoelectron spectroscopy. rate 40%K ‐CN/CdSe‐D reached 2240.23 µmol h −1 g pure water. This study highlights significance dual tuning chemical ionic intercalation effective strategy enhancing , paving way further advancements technology.

Language: Английский

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Large‐Scale Continuous and In Situ Photosynthesis of Hydrogen Peroxide by Sulfur‐Functionalized Polymer Catalyst for Water Treatment

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(10)

Published: Jan. 24, 2024

Photocatalytic H

Language: Английский

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H₂O₂ Photosynthesis from H₂O and O₂ under Weak Light by Carbon Nitrides with the Piezoelectric Effect

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(30), P. 21147 - 21159

Published: July 16, 2024

Driven by the essential need of a green, safe, and low-cost approach to producing H

Language: Английский

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Photocatalytic H2O2 production over boron-doped g-C3N4 containing coordinatively unsaturated FeOOH sites and CoOx clusters

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Oct. 25, 2024

Graphitic carbon nitride (g-C

Language: Английский

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Magnetically separable and recyclable ZnFe2O4 nanoparticles as an effective activator in resorcinol-formaldehyde resins-based photocatalysis-self-Fenton system

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 351, P. 128044 - 128044

Published: May 27, 2024

Language: Английский

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Carbon dots bridged Zn0.5Cd0.5S with interfacial amide bond facilitating electron transfer for efficient photocatalytic hydrogen peroxide production

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 346, P. 123721 - 123721

Published: Jan. 10, 2024

Language: Английский

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