2D/3D BiVO₄@ZnIn₂S₄ Hierarchical Heterojunction for Enhanced One-Electron Oxygen Reduction Kinetics of H₂O₂ Artificial Photosynthesis

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Hydrogen peroxide (H2O2) artificial photosynthesis converts low-density solar energy into storable clean chemical energy, which is an important hot topic in green chemistry. Constructing heterojunctions effective tactic to enhance the oxygen reduction kinetics of H2O2 photosynthesis, however, actual source activity remains ambiguous. Here, a series BiVO4@ZnIn2S4 hierarchical (BZ-x, x = 0.4, 0.8, 1.2) were elegantly designed through piecing two-dimensional (2D) BiVO4 nanosheets onto surface three-dimensional (3D) ZnIn2S4 flower-like microspheres by straightforward ethanol ultrasound-induced self-assembly strategy. These BZ-x photocatalysts exhibit significantly enhanced photocatalytic production rates across wide pH range (3–13) compared with those pristine and ZnIn2S4, optimal BZ-0.8 showing excellent rate as high 1585.99 μmol g–1 h–1. Comprehensive analysis reveals that 2D 3D form Z-scheme heterojunction, can deliver favorable coupling between photogenerated electrons adsorption O2 at interface heterojunctions, thereby accelerating two-step one-electron kinetic process. This study provides new perspective for improving introducing heterojunction strategies.

Language: Английский

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Cd Single Atom as an Electron Mediator in an S‐Scheme Heterojunction for Artificial Photosynthesis of H₂O₂

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 13, 2025

Abstract Developing conductor‐mediated S‐scheme heterojunction photocatalysts imitating natural photosynthetic systems emerges as a promising approach to hydrogen peroxide (H 2 O ) production. However, achieving precise coupling between two semiconductors with charge shuttle and modulating the interfacial interactions still remain significant bottleneck. Herein, we propose catalyst architecture Cd single atom mediated formed by interfacing CdS TiO nanoparticles. This exhibits an H production rate high 60.33 µmol g −1 min under UV–vis light irradiation, which is attributed efficient transport at interface of thanks S‐scheme. In‐situ X‐ray photoelectron spectroscopy (XPS) electron spin resonance (ESR) spin‐trapping tests confirm transfer route. Femtosecond transient absorption (fs‐TA) other ex‐situ characterizations further corroborate across interface. work offers new perspective on constructing atoms heterojunctions enhance photocatalytic performance.

Language: Английский

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Enhanced exciton dissociation through scandium-decorated conjugated polymers for artificial photosynthesis of hydrogen peroxide

Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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In-situ construction of Bi-MOF-derived S-scheme BiOBr/CdIn2S4 heterojunction with rich oxygen vacancy for selective photocatalytic CO2 reduction using water

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: unknown, P. 129713 - 129713

Published: Sept. 1, 2024

Language: Английский

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Crystal plane regulation and heterostructure construction of ZnIn2S4/h-BN for boosting photocatalytic hydrogen evolution

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 163017 - 163017

Published: March 1, 2025

Language: Английский

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Furan-Based HTCC/In₂S₃ Heterojunction Achieves Fast Charge Separation To Boost the Photocatalytic Generation of H₂O₂ in Pure Water

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(21), P. 16245 - 16255

Published: Oct. 19, 2024

The limitations imposed by the high carrier recombination rate in current photocatalytic H2O2 production system substantially restrict of generation. Herein, we successfully prepared an In2S3/HTCC dense heterojunction bridged In–S–C bonds through situ polymerization glucose on In2S3. This interfacial bond provides a fast transfer channel for electrons at interface to achieve highly efficient charge efficiency, leading formation enhanced built-in electric field between In2S3 and HTCC, thus dramatically accelerating separation effectively prolonging lifetime photogenerated carriers. Moreover, coverage HTCC enhances absorption visible light sorption O2 In2S3, while lowering its two-electron oxygen reduction reaction (ORR) energy barrier. Notably, our research demonstrates that can generate not only well-known two-step one-electron ORR but also via alternative pathway utilizing 1O2 as intermediate, thereby enhancing production. Benefiting from these advantages, In2S3/HTCC-2 produce up 1392 μmol g–1 h–1 pure aqueous system, which is 18.2 5.2 times higher than respectively. Our work novel synthesis method new organic/inorganic photocatalysts based offers insights into potential mechanism bonding heterostructures regulate activity.

Language: Английский

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Z-scheme promoted interfacial charge transfer on Cu/In-porphyrin MOFs/CdIn2S4 heterostructure for efficient photocatalytic H2 evolution

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 354, P. 129220 - 129220

Published: Aug. 14, 2024

Language: Английский

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Modulating Yeager Adsorption Configuration of O₂ Through Cd Doping in Zn₃In₂S₆ for Photosynthesis of H₂O₂

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

Published: Oct. 14, 2024

Abstract The photocatalytic oxygen reduction reaction (ORR) is a key pathway for producing hydrogen peroxide (H 2 O ). While most previous studies have focused on the two‐step 2e − ORR process, one‐step two‐electron route offers thermodynamic and kinetic advantages that can significantly enhance activity selectivity. In this study, photocatalyst design reported by incorporating cadmium into vacancy‐rich Zn 3 S 6 (Cd‐S V /ZIS). This catalyst enables H production via process without use of sacrificial agents, achieving high yield 39.42 µmol g −1 min under UV–vis light irradiation, outperforming ZIS‐based photocatalysts. Theoretical simulations experimental results demonstrate Cd doping improves carrier kinetics catalyst, broadens its absorption range, promotes Yeager adsorption configuration , leading to highly active selective generation. study provides insights efficient photocatalysts production.

Language: Английский

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Construction of a Hierarchical Core–Shell Z-Scheme Two-Dimensioanl/Two-Dimensional ZnIn₂S₄@TpBpy Heterostructure for Photocatalytic Reduction of U(VI)

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 6, 2025

The essential nature of the photocatalytic process is charge transfer. To optimize spatial separation photogenerated electron–hole (e–-h+) pairs for high-performance catalytic efficiency, in this work, we have successfully prepared hierarchical core–shell two-dimensional (2D)/2D ZnIn2S4@TpBpy (ZIS@TpBpy) with well-matched Z-scheme interfacial transfer channels uranium (U(VI)) photoreduction. electron configuration was confirmed by internal electric field (IEF) formation analysis, XPS characterization, and DMPO spin-trapping EPR spectroscopy. With large specific surface area abundant active sites, ZIS@TpBpy composite achieved a U(VI) extraction rate 94.08%. In addition, removal constant (0.0137 min–1) 2.05 4.28 times higher than those TpBpy (0.0067 ZnIn2S4 (0.0032 min–1), respectively. First, combination organic inorganic components expanded range visible light absorption utilization. Afterward, under visible-light irradiation, more e–-h+ dissociated migrated to driven IEF heterostructure. Simultaneously, synergistic effect between polarization potential generated sites (N O atoms) framework further accelerated depletion translocation pairs, which significantly improved efficiency reduction U(VI).

Language: Английский

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Fabrication of plasmonic Hollow-Cu2O/Pt nanocages with inter-embedded nanoparticles subunits heterojunctions for efficient photocatalytic degradation and hydrogen evolution

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 162656 - 162656

Published: Feb. 1, 2025

Language: Английский

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