Recent advances in semiconductor heterojunctions: a detailed review of the fundamentals of photocatalysis, charge transfer mechanism and materials

RSC Applied Interfaces, Год журнала: 2023, Номер 1(1), С. 43 - 69

Опубликована: Сен. 27, 2023

Semiconductor heterojunctions are pivotal in determining the overall photocatalytic efficiency. This review explores recent advances diverse heterojunction types, charge transfer mechanisms and materials.

Язык: Английский

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Reticular framework materials for photocatalytic organic reactions

Chemical Society Reviews, Год журнала: 2023, Номер 52(22), С. 7949 - 8004

Опубликована: Янв. 1, 2023

Photocatalytic organic reactions, harvesting solar energy to produce high value-added chemicals, have attracted increasing attention as a sustainable approach address the global crisis and environmental issues. Reticular framework materials, including metal-organic frameworks (MOFs) covalent (COFs), are widely considered promising candidates for photocatalysis owing their crystallinity, tailorable pore environment extensive structural diversity. Although design synthesis of MOFs COFs been intensively developed in last 20 years, applications photocatalytic transformations still preliminary stage, making systematic summary necessary. Thus, this review aims provide comprehensive understanding useful guidelines exploration suitable MOF COF photocatalysts towards appropriate reactions. The commonly used reactions categorized facilitate identification reaction types. From practical viewpoint, fundamentals experimental design, active species, performance evaluation external conditions, discussed detail easy experimentation. Furthermore, latest advances COFs, composites, comprehensively summarized according actual sites, together with discussion structure-property relationship. We believe that study will be helpful researchers novel reticular various synthetic applications.

Язык: Английский

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Covalent organic frameworks and their composites as multifunctional photocatalysts for efficient visible-light induced organic transformations

Coordination Chemistry Reviews, Год журнала: 2022, Номер 472, С. 214774 - 214774

Опубликована: Авг. 23, 2022

Язык: Английский

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Structural Motifs in Covalent Organic Frameworks for Photocatalysis

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Март 10, 2024

Abstract Covalent organic frameworks (COFs) attract significant attention due to their ordered, crystalline, porous, metal‐free, and predictable structures. These unique characteristics offer great opportunities for the diffusion transmission of photogenerated charges during photocatalysis. Currently, a considerable number COFs are used as metal‐free semiconductor photocatalysts. This review aims understand relationships between structure photocatalysis performance provides in‐depth insight into synthetic strategy improve performance. Subsequently, focuses on structural motif in sustainable photocatalytic hydrogen evolution, carbon dioxide reduction, peroxide generation, compound transformations. Last, conjunction with progress achieved challenges yet be overcome, candid discussion is undertaken regarding field COF photocatalysis, accompanied by presentation potential research avenues future directions. seeks provide readers comprehensive understanding pivotal role robust guidance innovative utilization

Язык: Английский

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Fabrication of an Organic/Inorganic Hybrid TpPa-1-COF/ZnIn₂S₄ S-Scheme Heterojunction for Boosted Photocatalytic Hydrogen Production

ACS Applied Energy Materials, Год журнала: 2023, Номер 6(2), С. 1103 - 1115

Опубликована: Янв. 6, 2023

Covalent organic frameworks (COFs) exhibit significant prospects in photocatalytic H2 evolution because of their periodic pore structure, large surface area, and outstanding chemical stability. Nevertheless, a bare COF always suffers from poor photogenerated charge separation efficiency. Hence, it is crucial to design highly effective COF-based heterojunction photocatalysts. In this work, we have successfully prepared an organic/inorganic hybrid TpPa-1-COF/ZnIn2S4 (ZIS) with well-matched S-scheme interfacial charge-transfer channels. The results demonstrate that COF/ZIS-20% has optimal rate, which can reach 853 μmol g–1 h–1 the absence any cocatalyst, 6.2 times TpPa-1-COF when exposed visible light. Moreover, apparent quantum efficiency (AQE) at 420 nm up 2.08%. Density functional theory (DFT) calculations demonstrated presence transfers ZnIn2S4 spontaneously formation electric field area COF/ZIS under ground-state condition. Furthermore, creation tuned built-in drives directional transfer, while electron high reduction, thus synergistically promoting evolution, been by experiments theoretical calculation results. This work provides advanced method for preparation high-efficiency photocatalysts based on matching band structures.

Язык: Английский

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Advances in COFs for energy storage devices: Harnessing the potential of covalent organic framework materials

Energy storage materials, Год журнала: 2023, Номер 63, С. 103014 - 103014

Опубликована: Окт. 7, 2023

Язык: Английский

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Composite materials based on covalent organic frameworks for multiple advanced applications

Exploration, Год журнала: 2023, Номер 3(3)

Опубликована: Май 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

Язык: Английский

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Metal–organic frameworks for organic transformations by photocatalysis and photothermal catalysis

Chemical Society Reviews, Год журнала: 2024, Номер 53(18), С. 9378 - 9418

Опубликована: Янв. 1, 2024

Organic transformation by light-driven catalysis, especially, photocatalysis and photothermal denoted as photo(thermal) is an efficient, green, economical route to produce value-added compounds. In recent years, owing their diverse structure types, tunable pore sizes, abundant active sites, metal-organic framework (MOF)-based catalysis has attracted broad interest in organic transformations. this review, we provide a comprehensive systematic overview of MOF-based for First, the general mechanisms, unique advantages, strategies improve performance MOFs are discussed. Then, outstanding examples transformations over introduced according reaction type. addition, several representative advanced characterization techniques used revealing charge kinetics intermediates presented. Finally, prospects challenges field proposed. This review aims inspire rational design development materials with improved catalysis.

Язык: Английский

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Molecular‐Level Regulation Strategies Toward Efficient Charge Separation in Donor−Acceptor Type Conjugated Polymers for Boosted Energy‐Related Photocatalysis

Advanced Energy Materials, Год журнала: 2023, Номер 14(5)

Опубликована: Дек. 11, 2023

Abstract The development of efficient photocatalysts for artificial photocatalytic energy conversion is an intriguing strategy. Promisingly, conjugated polymers (CPs) have been actively investigated as alternatives to traditional inorganic semiconductors photocatalysis due their molecularly tunable optoelectronic properties, thus providing a great platform molecular design. Incorporating donor (D) and acceptor (A) units into the backbone CPs ensures adequate D−A interface, which essential facilitating charge separation. This approach also allows bandgaps leading significant progress in conversions recent years. Here, fundamentals D–A type are initially outlined, followed by advanced experimental methods density functional theory (DFT) calculations investigating carrier dynamics. Then, detailed exposition synthetic strategies carried out. Their extensive applications diverse energy‐related conversions, such hydrogen evolution, oxygen overall water splitting, CO 2 reduction, N H O evolution comprehensively presented. review provides new comprehensive insights molecular‐level design catalysts boosted conversion, expected further advance photocatalysis.

Язык: Английский

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Covalent Organic Framework as a Metal-Free Photocatalyst for Dye Degradation and Radioactive Iodine Adsorption

Langmuir, Год журнала: 2023, Номер 39(11), С. 4071 - 4081

Опубликована: Март 11, 2023

Exploring a covalent organic framework (COF) material as an efficient metal-free photocatalyst and adsorbent for the removal of pollutants from contaminated water is very challenging in context sustainable chemistry. Herein, we report new porous crystalline COF, C6-TRZ-TPA via segregation donor-acceptor moieties through extended Schiff base condensation between tris(4-formylphenyl)amine 4,4',4″-(1,3,5-triazine-2,4,6-triyl)trianiline. This COF displayed Brunauer-Emmett-Teller (BET) surface area 1058 m2 g-1 with pore volume 0.73 cc g-1. Again, π-conjugation, presence heteroatoms throughout framework, narrow band gap 2.2 eV, all these features collectively work environmental remediation two different perspectives: it could harness solar energy clean-up, where has been explored robust wastewater treatment iodine capture. In our endeavor treatment, have conducted photodegradation rose bengal (RB) methylene blue (MB) model since are extremely toxic, health hazard, bioaccumulative nature. The catalyst showed high catalytic efficiency 99% towards degradation 250 parts per million (ppm) RB solution 80 min under visible light irradiation rate constant 0.05 min-1. Further, found to be excellent efficiently adsorbed radioactive its well vapor phase. exhibits rapid capturing tendency outstanding uptake capacity 4832 mg

Язык: Английский

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