Variation of Chemical Microenvironment of Pores in Hydrazone‐Linked Covalent Organic Frameworks for Photosynthesis of H2O2

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Авг. 20, 2024

Photocatalytic synthesis of H

Язык: Английский

---

Structurally Locked High-Crystalline Covalent Triazine Frameworks Enable Remarkable Overall Photosynthesis of Hydrogen Peroxide

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(43), С. 29943 - 29954

Опубликована: Окт. 17, 2024

The development of green and efficient hydrogen peroxide (H

Язык: Английский

---

Enhancing photocatalytic hydrogen peroxide generation by tuning hydrazone linkage density in covalent organic frameworks

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Янв. 8, 2025

The conversion of solar energy into chemical or high-value chemicals has attracted considerable research interest in the context global crisis. Hydrogen peroxide (H2O2) is a versatile and powerful oxidizing agent widely used synthesis medical disinfection. H2O2 also serves as clean source fuel cells, generating electricity with zero-carbon emissions. Recently, sustainable production from water oxygen using covalent organic frameworks (COFs) photocatalysts attention; however, systematic studies highlighting role linkages determining photocatalytic performance are scarce. Under these circumstances, herein, we demonstrate that varying imine hydrazone within framework significantly influences production. COFs high-density linkages, providing optimal docking sites for oxygen, enhance generation activity (1588 μmol g−1 h−1 pure air), leading to highly efficient solar-to-chemical conversion. This work systematically investigates effect linkage density on enhancement hydrogen generation, aim achieving high-performance photocatalysis.

Язык: Английский

---

Synergistic Utilization of Photogenerated Electrons and Holes in Carbon Nitride Nanosheet Assembly for Enhanced Photocatalytic H2O2 Production

Applied Catalysis B Environment and Energy, Год журнала: 2025, Номер unknown, С. 124998 - 124998

Опубликована: Янв. 1, 2025

Язык: Английский

---

Rational Design of Covalent Organic Frameworks for Photocatalytic Hydrogen Peroxide Production

Macromolecular Rapid Communications, Год журнала: 2025, Номер unknown

Опубликована: Фев. 12, 2025

Abstract Photocatalytic production of hydrogen peroxide (H 2 O ) represents a significant approach to achieving sustainable energy generation through solar energy, addressing both shortages and environmental pollution. Among various photocatalytic materials, covalent organic frameworks (COFs) have gained widespread attention in‐depth research due their unique advantages, including high porosity, predesignability, atomic‐level tunability. In recent years, progress has been made in the development, performance enhancement, mechanistic understanding COF‐based photocatalysts. This review focuses on latest advancements H using COFs, particularly emphasizing rational design COF structures regulate catalytic exploring fundamental processes involved photocatalysis. Based current achievements this field, paper also discusses existing challenges future opportunities, aiming provide reference for application COFs production.

Язык: Английский

---

Hydroxyl-Functionalized Donor–Acceptor Covalent Organic Frameworks for Efficient Photocatalytic Hydrogen Peroxide Production under Visible Light

ACS Catalysis, Год журнала: 2025, Номер unknown, С. 3584 - 3594

Опубликована: Фев. 13, 2025

Photocatalytic hydrogen peroxide (H2O2) production via the oxygen reduction reaction (ORR) provides a promising and energy-saving alternative to traditional energy-intensive anthraquinone process. Nevertheless, how decrease energy barrier of two-electron (2e–) ORR process photosynthesize H2O2 efficiently is still challenging. Herein, three hydroxyl-functionalized donor–acceptor covalent organic frameworks (COFs) are synthesized for photocatalytic under visible-light irradiation (420 ≤ λ 780 nm). It observed that dihydroxyl functionalization (2,5-DhaTph 2,3-DhaTph) facilitates transportation photogenerated carriers between acceptor donor units accelerates kinetics rate-limiting step when comparing with monohydroxyl (2-DhaTph). Further, 2,5-DhaTph para-position hydroxyl shows higher photosynthesis efficiency than 2,3-DhaTph (ortho-positioned hydroxyl), probably due greater exposure catalytically active sites. This supported by better structural symmetry 2,5-DhaTph, which contributes crystallinity specific surface areas. Electron paramagnetic resonance (EPR) spectra theoretical calculations show produces *OOH intermediates reduced barrier, resulting in high rate 2103.1 μmol h–1 g–1. Regulating amount substituents their location on COFs an effective strategy boost carrier transfer reduce O2-to-H2O2 conversion.

Язык: Английский

---

Promising CdS quantum dots/FeS2 microsphere Z-scheme heterojunction for boosting C-C coupling and hydrogen production

Journal of Cleaner Production, Год журнала: 2025, Номер unknown, С. 145361 - 145361

Опубликована: Март 1, 2025

Язык: Английский

---

Advances of functionalized bipyridine-based covalent-organic frameworks for boosting photocatalysis

Coordination Chemistry Reviews, Год журнала: 2024, Номер 516, С. 215997 - 215997

Опубликована: Июнь 5, 2024

Язык: Английский

---

Interfacial design of pyrene-based covalent organic framework for overall photocatalytic H2O2 synthesis in water

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 678, С. 1170 - 1180

Опубликована: Сен. 23, 2024

Язык: Английский

---

Unlocking Topological Effects in Covalent Organic Frameworks for High‐Performance Photosynthesis of Hydrogen Peroxide

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 7, 2024

Covalent organic frameworks (COFs) offer a compelling platform for the efficient photosynthesis of hydrogen peroxide (H

Язык: Английский

---