Covalent Organic Frameworks Enable Sustainable Solar to Hydrogen Peroxide

Advanced Functional Materials, Год журнала: 2023, Номер 34(12)

Опубликована: Дек. 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.

Язык: Английский

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Engineering 2D Photocatalysts for Solar Hydrogen Peroxide Production

Advanced Energy Materials, Год журнала: 2024, Номер 14(23)

Опубликована: Апрель 3, 2024

Abstract Solar energy can be utilized in photocatalysis technology to realize light‐driven hydrogen peroxide (H 2 O ) production, a green chemical synthesis route. Designing high‐performance photocatalysts is critical achieving practical solar H production. During the past decade, significant research progress made photocatalytic materials for Particularly 2D materials‐based stand out due their unique physical and properties. This review highlights intricate relationship between material innovation photochemical It starts with fundamental principles of generation, focusing on crucial steps such as photon absorption, carrier dynamics, surface reactions, challenges that solve at each step. Then, various production are introduced detail. Engineering strategies optimize performance discussed afterward. Finally, future opportunities designing outlined. expected inspire engineering conversion other chemicals.

Язык: Английский

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Unraveling Quantum Mysteries: Probing the Interplay of CdS Quantum Dots and g-C₃N₄ Nanosheets for Enhanced Photo/Electrocatalytic Hydrogen Evolution

The Journal of Physical Chemistry C, Год журнала: 2023, Номер 128(1), С. 85 - 94

Опубликована: Дек. 27, 2023

A series of CdS quantum dots (QDs) at low temperature were grown on the nanosheets (NSs) g-C3N4 through an in situ successive ionic layer adsorption and reaction process. The visible light active band gap ultrathin NSs has attracted more attention due to its essential bandgap for water splitting reaction. However, a single catalyst with limited number sites does not exhibit significant photo/electrocatalytic activity hydrogen production. In current strategies, development photogenerated charge transfer-driven type-II QDs/g-C3N4 heterostructure demonstrates enhanced evolution amount 14.8 mmol gcat–1 H2 gas AQY 27.6% as result decreased transfer resistance significantly increased electrochemical surface area. Additionally, as-prepared shown overpotentials 182 382 mV (HER) oxygen (OER) reactions reach density 10 mA cm–2, respectively. addition, bifunctional electrocatalyst exhibits 4- 6-fold higher mass material OER HER compared g-C3N4, considerable faradaic efficiency under potentiostatic system, Moreover, remarkable was well explained photoluminescence quenching effect Mott–Schottky analysis.

Язык: Английский

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Simultaneously tuning electronic reaction pathway and photoactivity of P, O modified cyano-rich carbon nitride enhances the photosynthesis of H2O2

Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 342, С. 123337 - 123337

Опубликована: Сен. 26, 2023

Язык: Английский

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Review and perspectives on carbon-based electrocatalysts for the production of H₂O₂via two-electron oxygen reduction

Green Chemistry, Год журнала: 2023, Номер 25(23), С. 9501 - 9542

Опубликована: Янв. 1, 2023

As a versatile and environmentally friendly chemical, hydrogen peroxide (H 2 O ) is in high demand.

Язык: Английский

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Keto-anthraquinone covalent organic framework for H2O2 photosynthesis with oxygen and alkaline water

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Март 26, 2024

Hydrogen peroxide photosynthesis suffers from insufficient catalytic activity due to the high energy barrier of hydrogen extraction H2O. Herein, we report that mechanochemically synthesized keto-form anthraquinone covalent organic framework which is able directly synthesize H2O2 (4784 μmol h-1 g-1 at λ > 400 nm) oxygen and alkaline water (pH = 13) in absence any sacrificial reagents. The strong alkalinity resulted formation OH-(H2O)n clusters water, were adsorbed on keto moieties within then dissociated into O2 active hydrogen, because was largely lowered. produced reacted with generate anthrahydroquinone, subsequently oxidized by produce H2O2. This study ultimately sheds light importance H2O for demonstrates synthesis achievable under conditions.

Язык: Английский

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Ultra-highly efficient enrichment of uranium from seawater via studtite nanodots growth-elution cycle

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Авг. 7, 2024

Consecutive uranium extraction from seawater is a promising approach to secure the long-term supply of and sustainability nuclear energy. Here, we report an ultra-highly efficient strategy via studtite nanodots growth with impressive uranyl uptake capacity ~ 154.50 mg/g natural in 12 consecutive days (i.e., average for 12.875 mg/g/day). Uranyl can be extracted as under visible light reaction between adsorbed photogenerated H2O2 imine-based Covalent-Organic Framework photocatalysts. In detail, over Tp-Bpy, Tp-Bpy-2 Tp-Py multiple chelating sites, found which eluted readily, while Tp-Bd Tb-Bpy, transformed into nanorods that more inert elution. Abundant sites structural regulation COF photocatalysts are proved facilitate formation elution nanodots. The continuous desired sustain power technology development up-recycle approaches remain challenge. Here authors employing covalent-organic frameworks

Язык: Английский

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Covalent Organic Frameworks for Photocatalytic Hydrogen Peroxide Generation

ACS Materials Letters, Год журнала: 2024, Номер 6(5), С. 2007 - 2049

Опубликована: Апрель 17, 2024

Hydrogen peroxide (H2O2), a valuable chemical, is widely used as powerful oxidizing agent in chemical synthesis, pharmaceuticals, medical disinfection, and environmental treatment industries. Currently, over 95% of H2O2 produced industrially using the anthraquinone process, which associated with its high energy consumption hazardous byproducts. Therefore, photochemical synthesis from water oxygen covalent organic framework based photocatalysts have attracted considerable attention. This review aims to outline recent achievements, challenges future prospects COFs heterogeneous for sustainable generation. We summarize chronological development COFs, different mechanisms involved, detailed experiments quantification methods photocatalytic The puts forward an outlook, highlighting advantages limitations anticipate that this will provide insight into current progress inspire next-generation production.

Язык: 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, Год журнала: 2024, Номер 63(10)

Опубликована: Янв. 24, 2024

Photocatalytic H

Язык: Английский

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Microenvironmental regulation of covalent organic frameworks for photocatalytic hydrogen peroxide production

Coordination Chemistry Reviews, Год журнала: 2024, Номер 506, С. 215694 - 215694

Опубликована: Фев. 14, 2024

Язык: Английский

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