Designing covalent organic frameworks with Co-O4 atomic sites for efficient CO2 photoreduction

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Feb. 28, 2023

Abstract Cobalt coordinated covalent organic frameworks have attracted increasing interest in the field of CO 2 photoreduction to CO, owing their high electron affinity and predesigned structures. However, achieving conversion efficiency is challenging since most Co related coordination environments facilitate fast recombination photogenerated electron-hole pairs. Here, we design two kinds Co-COF catalysts with oxygen atoms find that after tuning environment, reported framework catalyst Co-O 4 sites exhibits a production rate 18000 µmol g −1 h selectivity as 95.7% under visible light irradiation. From in/ex-situ spectral characterizations theoretical calculations, it revealed significantly carrier migration matrixes inhibit pairs photocatalytic process. This work opens way for high-performance photoreduction.

Language: Английский

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MOFs-based S-scheme heterojunction photocatalysts

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 504, P. 215674 - 215674

Published: Jan. 23, 2024

Language: Английский

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Recent Progress of Covalent Organic Frameworks‐Based Materials in Photocatalytic Applications: A Review

Small, Journal Year: 2023, Volume and Issue: 19(48)

Published: Aug. 4, 2023

Abstract Covalent organic frameworks (COFs) are one type of porous materials linked by covalent bonds. COFs exhibit many outstanding characteristics such as high porosity, chemical and thermal stability, large specific surface area, efficient electron transfer efficiency, the ability for predesigned structures. These exceptional advantages enable to remarkable performance in photocatalysis. Additionally, activity photocatalysts can be significantly upgraded ion doping formation heterojunctions. This paper summarizes latest research progress on COF‐based applied photocatalytic systems. Initially, typical structures preparation methods analyzed compared. Moreover, essential principles reactions over COFs‐based developments hydrogen production, CO 2 reduction, pollutants elimination, transformation, overall water splitting indicated. At last, outlook challenges photocatalysis discussed. review is intended permit instructive guidance use based future.

Language: Английский

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Composite materials based on covalent organic frameworks for multiple advanced applications

Exploration, Journal Year: 2023, Volume and Issue: 3(3)

Published: May 23, 2023

Covalent organic frameworks (COFs) stand for a class of emerging crystalline porous materials, which are ingeniously constructed with units through strong covalent bonds. Their excellent design capabilities, and uniform tunable pore structure make them potential materials various applications. With the continuous development synthesis technique nanoscience, COFs have been successfully combined variety functional to form COFs-based composites superior performance than individual components. This paper offers an overview different types reported so far, particular focus on applications composites. Moreover, challenges future prospects presented. We anticipate that review will provide some inspiration further

Language: Английский

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Construction of a 2D/2D Crystalline Porous Materials Based S‐Scheme Heterojunction for Efficient Photocatalytic H₂ Production

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(11)

Published: Jan. 7, 2024

Abstract Generally, the low electron–hole separation efficiency of covalent organic frameworks (COFs) prevents their catalytic performance from reaching satisfactory results. For this reason, creation heterojunctions is considered an effective strategy but usually suffers dimensional mismatch integrated material, even at expense its redox capacity. To overcome these difficulties, a novel 2D/2D S‐scheme heterojunction between H 2 N–Cu–MOF (NCM) and TpPa–1–COF (TP1C) successfully constructed for efficient photocatalytic production. The matching dimensions two crystalline porous materials enables with abundant surface reactive sites, strong interaction optimized electronic structure. Moreover, combination can also form S–scheme heterojunction, which not only promote pair, preserve ability, thus remarkably boosting competence. Consequently, rate optimal 20% NCM/TP1C in production reaches 4.19 mmol g −1 h , 46.5 times higher than that bare NCM, 22.1 folds over pure TP1C. This research offers innovative perspective formation based on crystal solar energy utilization.

Language: Английский

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Metal-Free Highly Stable and Crystalline Covalent Organic Nanosheet for Visible-Light-Driven Selective Solar Fuel Production in Aqueous Medium

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(9), P. 5926 - 5937

Published: April 17, 2023

Conversion of CO2 into solar fuels via artificial photosynthesis is one the most promising and sustainable approaches to mitigate global warming worldwide energy shortage. Covalent organic frameworks (COFs) exhibit well-defined arrangements building blocks, tunable porosity, high thermal chemical stability in harsh conditions. The band gaps COFs by suitably introducing chromophoric light-harvesting units make them a unique class metal-free heterogeneous photocatalysts for successful conversion fuel. In this work, we report simple, efficient, low-cost 2D COF (TTA-Tz) composed 1,3,5-tris-(4-aminophenyl)triazine (TTA) 4,4′-(thiazolo[5,4-d]thiazole-2,5-diyl)dibenzaldehyde (Tz) photocatalytic reduction. 2D-layered exfoliated ultrathin covalent nanosheets (CONs), which shows visible-light-driven photoreduction CO (yield = 2.8 mmol g–1, rate 82 μmol h–1 selectivity >99%) aqueous medium without an external sacrificial electron donor. Interestingly, mixed solvent system, evolution (163 g–1 h–1) found double than case with 99% selectivity. By both BNAH TEA as donors, significant amount CH4 (499 g–1) produced (310 further enhanced. mechanistic insight reduction studied DFT-based theoretical calculation, supported situ diffuse reflectance spectroscopy study.

Language: Английский

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Interface engineering in a nitrogen-rich COF/BiOBr S-scheme heterojunction triggering efficient photocatalytic degradation of tetracycline antibiotics

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 661, P. 761 - 771

Published: Feb. 3, 2024

Language: Английский

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2D/2D g-C3N4@BiOI S-scheme heterojunction with gas-liquid-solid triphase interface for highly efficient CO2 photoreduction

Science China Materials, Journal Year: 2024, Volume and Issue: 67(6), P. 1830 - 1838

Published: April 28, 2024

Language: Английский

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Metal–organic framework-based S-scheme heterojunction photocatalysts

Nanoscale, Journal Year: 2024, Volume and Issue: 16(11), P. 5487 - 5503

Published: Jan. 1, 2024

A timely review on the recent advances of metal–organic framework-based step-scheme heterojunctions with respect to their synthesis, structures and applications is provided.

Language: Английский

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Analysis of metal–organic framework-based photosynthetic CO2 reduction

Nature Synthesis, Journal Year: 2024, Volume and Issue: 3(3), P. 307 - 318

Published: March 7, 2024

Language: Английский

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