Chemical Research in Chinese Universities, Journal Year: 2025, Volume and Issue: unknown
Published: March 13, 2025
Language: Английский
Chemical Research in Chinese Universities, Journal Year: 2025, Volume and Issue: unknown
Published: March 13, 2025
Language: Английский
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(24)
Published: April 12, 2024
Photocatalytic oxygen reduction reactions and water oxidation are extremely promising green approaches for massive H
Language: Английский
Citations
34Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(43), P. 29943 - 29954
Published: Oct. 17, 2024
The development of green and efficient hydrogen peroxide (H
Language: Английский
Citations
22Small, Journal Year: 2024, Volume and Issue: 20(44)
Published: July 6, 2024
Abstract Since 2020, covalent organic frameworks (COFs) are emerging as robust catalysts for the photosynthesis of hydrogen peroxide (H 2 O ), benefiting from their distinct advantages. However, current efficiency H production and solar‐to‐chemical energy conversion (SCC) remain suboptimal due to various constraints in reaction mechanism. Therefore, there is an imperative propose improvement strategies accelerate development this system. This comprehensive review delineates recent advances, challenges, utilizing COFs photocatalytic production. It explores fundamentals challenges (e.g., oxygen (O ) mass transfer rate, adsorption capacity, response sunlight, electron‐hole separation efficiency, charge selectivity, desorption) associated with process, well advantages, applications, classification, preparation purpose. Various enhance performance highlighted. The aims stimulate further advancements discusses potential prospects, application areas field.
Language: Английский
Citations
20Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 24, 2025
Abstract Photosynthesizing H 2 O from real seawater is a promising and green avenue but suffers salt‐deactivated effects with limitations on stability photocatalytic activity. Herein, by the Pictet–Spengler reaction, two fully conjugated thieno[3,2‐c]pyridine‐linked covalent organic frameworks (named TBA‐COF TCA‐COF) are synthesized for photoproduction first time. Without sacrificial agents in , TCA‐COF exhibit impressive generation rates of 8878 6023 µmol g −1 h solar‐to‐chemical conversion efficiency 0.62% 0.42%, respectively, superior to their Schiff base analogs. Further experimental theoretical investigations reveal that, compared imine‐linkage counterparts, one‐pot cyclized TCA‐COF, reaction improves charge carrier separation efficiency, alters photoreduction center triazine benzene parts pyridine units, modulates energy band structures drive 2e − oxygen reduction water oxidation thereby enhances photosynthetic Notably, seawater‐produced flow reactors packed can be directly utilized E. coli sterilization. The present study highlights construction robust COFs thieno[3,2‐c]pyridine linkage via sustainable producing seawater.
Language: Английский
Citations
4Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(24), P. 16681 - 16688
Published: June 5, 2024
Electrochemiluminescence (ECL) involves charge transfer between electrochemical redox intermediates to produce an excited state for light emission. Ensuring precise control of is essential decoding ECL fundamentals, yet guidelines on how achieve this conventional emitters remain unexplored. Molecular ratchets offer a potential solution, as they enable the directional energy or chemicals while impeding reverse movement. Herein, we designed 10 pairs imine-based covalent organic frameworks reticular delicately manipulate intrareticular directing transduction from electric and chemical energies. Aligning donor acceptor (D–A) directions with imine dipole effectively facilitates migration, whereas reversing D–A direction impedes it. Notably, ratchet effect directionality intensified increasing contrast, resulting in remarkable 680-fold improvement efficiency. Furthermore, dipole-controlled exciton binding energy, electron/hole decay kinetics, femtosecond transient absorption spectra identified electron tendency N-end toward C-end during transduction. An exponential correlation efficiency difference was discovered. Our work provides general approach design next-generation devices.
Language: Английский
Citations
17Advanced Materials, Journal Year: 2024, Volume and Issue: 36(32)
Published: May 29, 2024
Piezo-synthesis of H
Language: Английский
Citations
16ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(9), P. 3932 - 3940
Published: July 26, 2024
Photosynthesizing H2O2 by the oxygen reduction reaction (ORR) and water oxidation (WOR) is a promising green avenue for generation but limited charge carrier recombination rate sluggish kinetics. Herein, Bi4O5Br2/COF step-scheme (S-scheme) heterojunction (named BIT) created first time covalent organic frameworks (TTD-COF) Bi4O5Br2, with an increased separation efficiency photosynthetic activity. Under air pure water, BIT6 exhibits highest production of 5221 μmol g–1 h–1, which 20 1.7 times greater than that individual Bi4O5Br2 TTD-COF. Subsequent mechanism analysis reveals photosynthesizes through overpowering indirect 2e– ORR paths (O2–O2• ––H2O2 O2–O2• ––O21–H2O2) weak direct WOR pathways. Moreover, in situ photogeneration process can be accompanied degradation antibiotics. This study offers in-depth insights into COF-based S-scheme heterojunctions enhanced photoproduction.
Language: Английский
Citations
13Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(5), P. 114143 - 114143
Published: Sept. 16, 2024
Language: Английский
Citations
11Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 16, 2024
Abstract Covalent organic frameworks (COFs) with stable crystalline porous structures and flexible assembly properties contribute to the direct photocatalytic synthesis of H 2 O meet growing global demand. To address challenges insufficient redox capacity photogenerated carrier recombination COFs, S‐scheme heterojunction is constructed from COFs quantum dots (QDs) improve production . Herein, 0D ZnCdS QDs (ZCS) uniformly anchor on surface a 2D conjugated tetrathiafulvalene‐based COF (TT‐COF), affording TT‐COF/ZCS. Formation effectively prevents agglomeration ZCS, modulates energy band structure TT‐COF, enhances migration carriers ability. As total consequence, optimized (TZ‐40) able afford in yield up 5171 µmol g −1 h under visible light irradiation , much higher than those for 2520 2647 The present result demonstrates great potential COFs/QDs‐based heterojunctions applications including production.
Language: Английский
Citations
11Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: unknown, P. 124856 - 124856
Published: Nov. 1, 2024
Language: Английский
Citations
11