Charge-transfer dynamics in S-scheme photocatalyst

Nature Reviews Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Language: Английский

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S‐Scheme Heterojunction Fabricated from Covalent Organic Framework and Quantum Dot for Enhanced Photosynthesis of Hydrogen Peroxide from Water and Air

Advanced 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

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Organic–inorganic S-scheme heterojunction photocatalysts: design, synthesis, applications, and challenges

eScience, Journal Year: 2024, Volume and Issue: unknown, P. 100354 - 100354

Published: Dec. 1, 2024

Language: Английский

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Surface-Active-Agent-Regulated nano-COFs: size effects and morphological control for enhanced photocatalytic hydrogen production performance

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125167 - 125167

Published: Feb. 1, 2025

Language: Английский

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Enhancing built-in electric field via ZnIn2S4 nanosheet decorated with ZnS quantum dots photocatalyst for highly efficient hydrogen evolution

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 689, P. 137189 - 137189

Published: March 1, 2025

Language: Английский

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Efficient Charge Abstraction and Oriented Accumulation Driven by Strong Interfacial Interaction Facilitate Photocatalytic Selective Oxidation of Furfuralcohol Coupled with H2 Evolution

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 361, P. 124694 - 124694

Published: Oct. 10, 2024

Language: Английский

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ZnIn₂S₄ Nanosheet Arrays on Co₉S₈ Hollow Nanotubes for the Photoredox Coupling of Benzyl Alcohol Oxidation with H₂ Evolution

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(17), P. 20849 - 20857

Published: Sept. 3, 2024

Combining hydrogen evolution with the conversion of benzyl alcohol (BA) into benzaldehyde (BAD) could provide an alternative pathway for sufficiently utilizing photogenerated electrons and holes to achieve high value chemicals fuels. Herein, a ZnIn2S4 nanosheet array/one-dimensional Co9S8 hollow nanotube (Co9S8/ZnIn2S4) composite has been fabricated by simple hydrothermal solvent thermal methods. Without utilization sacrificial agents, optimal 20%-Co9S8/ZnIn2S4 hybrid catalyst shows superior H2 production 3070.56 μmol·g–1·h–1 rate 93.2%, which are 4.1 2.9 times higher than those individual ZnIn2S4, respectively. The photocatalytic performance over Co9S8/ZnIn2S4 nanocomposites compared bare can be credited introduction nanotubes as cocatalyst, offer plentiful active sites, improve absorption visible light, facilitate separation transfer electron–hole pairs ZnIn2S4. Multiple cycling experiments indicate good durability nanocomposite. In addition, in situ electron paramagnetic resonance indicates that α-hydroxybenzyl radicals key intermediate BA BAD. This paper is intended meaningful reference ingenious design photocatalyst structure building high-performance coupled system sufficient holes.

Language: Английский

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High Sensitive and Stable UV–Vis Photodetector Based on MoS₂/MoO₃ vdW Heterojunction

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(26), P. 33829 - 33837

Published: June 24, 2024

The development of new high-performance photodetectors (PDs) is currently focused on achieving small size, low power consumption, cost, and large bandwidth. Two-dimensional (2D) materials heterostructures offer promising approaches for the future optoelectronic devices. However, there has been limited research 2D wide-bandgap semiconductor heterostructures. In this study, we successfully constructed a MoS2/MoO3 vdW heterojunction PD. This PD exhibited excellent response significant photovoltaic behavior in ultraviolet (UV) to visible (Vis) range. Under 365 nm UV light 1 V bias voltage, demonstrated high responsivity 645 mA/W, specific detectivity 8.98 × 1010 Jones, fast speeds 55.9/59.6 ms. At 0 reached as 157 mA/W. Furthermore, remarkable stability its performance. These outstanding characteristics can be attributed strong internal electric field created by type II structure chemical materials. work opens route application

Language: Английский

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Spatial Coupling of Photocatalytic CO₂ Reduction and Selective Oxidation on Covalent Triazine Framework/ZnIn₂S₄ Core–Shell Structures

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 25, 2024

Abstract Photocatalytic CO 2 reduction coupled with alcohol oxidation to aldehyde presents a promising strategy for the simultaneous production of fuels and valuable chemicals. The efficiency photocatalytic reactions remains low due poor charge separation, difficulty in activation, uncontrolled compatibility between reactions. This work S‐bridged covalent triazine framework (SCTF) core‐ZnIn S 4 shell photocatalysts selective furfural synthesis at distinct active sites. As evidenced by situ X‐ray photoelectron spectroscopy Kelvin probe force microscopy, photogenerated electrons composite transfer from ZnIn SCTF core, improving separation. Experimental theoretical results confirm that presence pyridine N atoms (Lewis basic sites) enhances adsorption, thereby reducing energy barrier *COOH generation promoting *CO production. Meanwhile, furfuryl deprotonation occur on consuming holes, which turn benefits conversion CO. result, optimized SCTF/ZnIn ‐0.2 core/shell photocatalyst exhibited superior yield 263.5 µmol g −1 95% under simulated sunlight irradiation.

Language: Английский

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Perovskite derived oxygen vacancies-rich BiOBr nanosheets for highly efficient photocatalysis

Applied Surface Science, Journal Year: 2024, Volume and Issue: 682, P. 161703 - 161703

Published: Nov. 5, 2024

Language: Английский

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