Dual‐Single‐Atom Tailoring with Bifunctional Integration for High‐Performance CO₂ Photoreduction

Advanced Materials, Год журнала: 2021, Номер 33(49)

Опубликована: Окт. 7, 2021

Single-atom photocatalysis has been demonstrated as a novel strategy to promote heterogeneous reactions. There is diversity of monoatomic metal species with specific functions; however, integrating representative merits into dual-single-atoms and regulating cooperative remain pressing challenge. For dual-single-atom catalysts, enhanced photocatalytic activity would be realized through bifunctional properties tuning the synergistic effect. Herein, supported on conjugated porous carbon nitride polymer are developed for effective CO2 reduction, featuring function cobalt (Co) ruthenium (Ru). A series in situ characterizations theoretical calculations conducted quantitative analysis structure-performance correlation. It concluded that active Co sites facilitate dynamic charge transfer, while Ru selective surface-bound interaction during photoreduction. The combination atom-specific traits synergy between lead high conversion corresponding apparent quantum efficiency (AQE) 2.8% at 385 nm, along turnover number (TON) more than 200 without addition any sacrificial agent. This work presents an example identifying roles different single-atom metals synergy, where two unique collaborate further boost performance.

Язык: Английский

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Covalent organic frameworks for photocatalysis: Synthesis, structural features, fundamentals and performance

Coordination Chemistry Reviews, Год журнала: 2022, Номер 475, С. 214889 - 214889

Опубликована: Окт. 15, 2022

Язык: Английский

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Recent progress in semiconductor/graphene photocatalysts: synthesis, photocatalytic applications, and challenges

RSC Advances, Год журнала: 2022, Номер 13(1), С. 421 - 439

Опубликована: Дек. 21, 2022

The presence of an increasing number organic pollutants in water now poses serious risks to both human health and ecological systems. Many these are persistent non-biodegradable. contamination fresh by harmful substances has compelled researchers develop innovative, efficient, cost-effective remediation techniques materials. Thus, photocatalysis long been recognized as a promising approach tackle environmental the energy crisis. However, semiconductor photocatalysts frequently suffer from defects such photo-generated charge carrier recombination, poor visible light response, slow surface reaction kinetics, which can be remedied modifications with appropriate co-catalysts. Therefore, graphene its derivatives have widely used supports for semiconductors due their distinctive optical, physicochemical, electrical features. This critical review addresses current progress design synthesis graphene/semiconductor photocatalysts, well use photocatalytic degradation hydrogen production. Several influencing parameters addressed, including pH, photocatalyst loading, initial pollutant concentration, wavelength, oxidizing species, all could significant impact on rate pollutant's degradation. Furthermore, recyclability catalyst activity mechanisms thoroughly discussed. Numerous case studies systematically presented. Moreover, future prospects major challenges highlighted.

Язык: Английский

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Covalent organic frameworks towards photocatalytic applications: Design principles, achievements, and opportunities

Coordination Chemistry Reviews, Год журнала: 2022, Номер 475, С. 214882 - 214882

Опубликована: Окт. 14, 2022

Язык: Английский

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Triazine–Porphyrin-Based Hyperconjugated Covalent Organic Framework for High-Performance Photocatalysis

Journal of the American Chemical Society, Год журнала: 2022, Номер 144(51), С. 23396 - 23404

Опубликована: Дек. 15, 2022

Covalent organic frameworks (COFs) with porphyrins as structural units are a new kind of porous polymers, which have regular and ordered structure, abundant porosity, good stability. In the past, construction porphyrin COFs was generally synthesized by routes such Schiff base reaction. Here, we report COF structure linking triazine ring. Using cyano group-terminated unit precursor, triazine-porphyrin hyperconjugated (TA-Por-sp2-COF) constructed through group's self-polymerization. The extension in two directions that stemmed from group at para-positions accounts for establishment highly two-dimensional topological structure. Attributing to collaboration electron-donating withdrawing blocks photo-induced carrier separation adequate porosity mass diffusion, this system showed high photocatalytic performance reactions aerobic coupling reaction benzylamine thioanisole selective oxidation.

Язык: Английский

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Synergistic effect of cyano defects and CaCO3 in graphitic carbon nitride nanosheets for efficient visible-light-driven photocatalytic NO removal

Journal of Hazardous Materials, Год журнала: 2022, Номер 442, С. 130040 - 130040

Опубликована: Сен. 21, 2022

Язык: Английский

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Vacancy engineering in nanostructured semiconductors for enhancing photocatalysis

Journal of Materials Chemistry A, Год журнала: 2021, Номер 9(32), С. 17143 - 17172

Опубликована: Янв. 1, 2021

This review highlights the recent impressive progress in vacancy engineering of photocatalysts and discusses outlook on future development vacancy-enhanced photocatalysis.

Язык: Английский

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Induced dipole moments in amorphous ZnCdS catalysts facilitate photocatalytic H2 evolution

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Март 23, 2024

Abstract Amorphous semiconductors without perfect crystalline lattice structures are usually considered to be unfavorable for photocatalysis due the presence of enriched trap states and defects. Here we demonstrate that breaking long-range atomic order in an amorphous ZnCdS photocatalyst can induce dipole moments generate strong electric fields within particles which facilitates charge separation transfer. Loading 1 wt.% low-cost Co-MoS x cocatalysts material increases H 2 evolution rate 70.13 mmol g −1 h , is over 5 times higher than its counterpart stable long-term up 160 h. A flexible 20 cm × /ZnCdS film prepared by a facile blade-coating technique numerous observable bubbles under natural sunlight, exhibiting potential scale-up solar production.

Язык: Английский

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Enaminone‐Linked Covalent Organic Frameworks for Boosting Photocatalytic Hydrogen Production

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(31)

Опубликована: Май 31, 2023

Covalent organic frameworks (COFs), possessing pre-designable structures and tailorable functionalities, are promising candidates for photocatalysis. Nevertheless, the most studied imine-linked COFs (Im-COFs) usually suffer from unsatisfactory stability photocatalytic performance. To meet this challenge, a series of highly stable enaminone-linked (En-COFs) have been synthesized afford much improved visible-light-driven hydrogen production activities, ranging 44 to 1078 times that isoreticular Im-COFs, with only difference being linkages (enaminone vs. imine) in their structures. The enhanced light-harvesting ability, facilitated exciton dissociation chemical account superior activity. Furthermore, quinoline-linked (Qu-COFs) further obtained via post-modification Im-COFs. Compared activities Qu-COFs significantly after modification, but still below those corresponding En-COFs (3-107 times). facile synthesis, excellent activity, high demonstrate platform

Язык: Английский

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Recent advances in photocatalytic nitrogen fixation and beyond

Nanoscale, Год журнала: 2022, Номер 14(8), С. 2990 - 2997

Опубликована: Янв. 1, 2022

The traditional synthesis of ammonia is an industrial process with high energy consumption that not environmentally friendly; thus, it urgent to develop cost-effective approaches synthesize under ambient conditions.

Язык: Английский

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