COFs‐Based Metal‐Free Heterojunctions for Solar‐to‐Chemical Energy Conversion

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(49)

Published: Aug. 17, 2024

Abstract Covalent organic frameworks (COFs) are a promising class of polymers with the merits robust framework, ultrahigh porosity, and molecularly precise backbones, which reveals great potential for solar‐to‐chemical energy conversion in context mitigating environmental crises. However, photochemical activities individual COFs not as desired, primarily due to their limited light absorption, insufficient dissociation photogenerated excitons readily recombined carriers. Recently, COFs‐based metal‐free heterojunctions synergistic effects provide feasible route boost photocatalytic activity more environmentally friendly cost‐competitive manners. Herein, it is first systematically overview advances from heterojunction types, heterointerfaces interactions, primary design mechanisms. Then, typical photocatalysts (e.g., g‐C 3 N 4 ‐COFs, carbon materials‐COFs, polymer semiconductor‐COFs, COFs‐COFs heterojunction) summarized. Finally, challenges long‐term outlooks future offered terms efficiency, yield, stability, cost reaction mechanisms, well standardized evaluation method activities. It anticipated that this review can deliver new insights into fundamental engineering conversion, further accelerate development area.

Language: Английский

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Rich oxygen vacancy and amorphous/crystalline ruthenium-doped CoCu -layered double hydroxide electrocatalysts for enhanced oxygen evolution reactions

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 671, P. 283 - 293

Published: May 23, 2024

Language: Английский

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Post-synthesis modification cationic covalent organic frameworks with multiple adsorption sites for efficient iodine adsorption

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2024, Volume and Issue: 702, P. 135100 - 135100

Published: Aug. 13, 2024

Language: Английский

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Design of Three-Dimensional Mesoporous Adamantane-Based Covalent Organic Framework with Exceptionally High Surface Areas

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(34), P. 45383 - 45388

Published: Aug. 15, 2024

The development of three-dimensional (3D) covalent organic frameworks (COFs) with large pores and high specific surface areas is critical for practical applications. However, it remains a tremendous challenge to reconcile the contradiction between porosity areas, increasing length building blocks leads structural interpenetration in 3D COFs. Here, we report preparation mesoporous COF by new steric hindrance engineering method. By incorporating adamantane into monomers instead carbon centers, successfully achieve 2-fold interpenetrated diamondoid-structured COFs, featuring permanent mesopores (up 33 Å), exceptionally (>3400 m

Language: Английский

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Regulating the Electronic Structure of Biobr by Cu-Doping to Promote Efficient Photocatalytic Nitrogen Fixation Reaction

Published: Jan. 1, 2025

Abstract: Element doping is critical in regulating the electronic structure to enhance N2 adsorption, opening up new possibilities for achieving highly efficient photocatalytic nitrogen reduction reactions (pNRR). In this study, we successfully prepared Cu-doped BiOBr (Cu-BiOBr) operating a simple solvothermal method. Density Functional Theory (DFT) calculations and experimental investigations were employed explore how Cu influences performance of pNRR over BiOBr. The DFT analysis indicates that alters structure, lowers energy barrier reaction, narrows bandgap. This adjustment leads remarkable NH3 production rate 466.3 μmol⋅gcat−1⋅h−1 without need sacrificial agents 2% Cu-BiOBr sample. addition, based on findings in-situ FTIR, detailed mechanism adsorption/activation hydrogenation reaction N ≡ bonds was proposed. research introduces prospective way designing transition metal-doped catalysts with regulated structures pNNR, which has significant implications advancing other material systems.

Language: Английский

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Photocatalysis for Sustainable Nitrogen Fixation: Fundamentals, Catalyst Design, Nanoarchitectonics, Applications, and Future Prospects

Advanced Sustainable Systems, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Abstract Photocatalytic nitrogen fixation has evolved as potential sustainable technique for producing ammonia in contrast to Haber‐Bosch (HB) process. In this process, semiconductor‐based materials are utilized the presence of light and water, thereby making it less energy‐intensive more eco‐friendly. However, photocatalytic have several disadvantages, including limited chemisorption activation nitrogen, low absorption, rapid charge recombination, sluggish kinetics. To overcome these issues, design catalyst tailoring active surface sites vital so that enhanced performance can be achieved. Also, there is debate about correct determination due interference by nitrogenous impurities. Taking all factors into consideration, review examines recent reports on defects modified (vacancy doping), facet‐engineered, heterojunction‐based catalysts fixation. The different quantification techniques like Nessler's reagent, indophenol method, ion chromatography (IC), etc. been discussed detail along with issues associated them. Finally, existing challenges outlook emerging technology presented. It expected will assist researchers understanding current state field effectively implementing pave way future advancements.

Language: Английский

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Regulating the electronic structure of BiOBr by Cu-doping to promote efficient photocatalytic nitrogen fixation reaction

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132501 - 132501

Published: March 1, 2025

Language: Английский

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Synergistically interface networked organic–inorganic photocatalytic membrane for highly stable Cr(VI) reduction and hydrogen production

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 492, P. 152330 - 152330

Published: May 17, 2024

Language: Английский

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Ruthenium-doped bimetallic organic framework self-supported electrodes as efficient electrocatalysts for oxygen evolution reaction

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 69, P. 195 - 202

Published: May 7, 2024

Language: Английский

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A cobalt-modified covalent organic framework enables highly efficient degradation of 2,4-dichlorophenol in high concentrations through peroxymonosulfate activation

Chemical Science, Journal Year: 2024, Volume and Issue: 15(31), P. 12488 - 12495

Published: Jan. 1, 2024

A post-modified covalent organic skeleton (JLNU-307-Co) for degradation of 2,4-DCP was prepared. This study provides a broad prospect the practical application COF materials in pollutants.

Language: Английский

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