Construction of 2D S‐Scheme Heterojunction Photocatalyst

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(8)

Published: Nov. 22, 2023

Abstract Semiconductor photocatalytic technology holds immense promise for converting sustainable solar energy into chemically storable energy, with significant applications in the realms of and environment. However, inherent issue rapid recombination photogenerated electrons holes hinders performance single photocatalysts. To overcome this challenge, construction 2D S‐scheme heterojunction photocatalysts emerges as an effective strategy. The deliberate design dimensionality ensures a substantial interfacial area; while, charge transfer mechanism facilitates efficient separation maximizes redox capabilities. This review commences fresh perspective on heterojunctions, followed by comprehensive exploration preparation methods characterization techniques. Subsequently, recent advancements are summarized. Notably, behind activity enhancement is elucidated. Finally, prospects development presented.

Language: Английский

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Metal–organic framework heterojunctions for photocatalysis

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(6), P. 3002 - 3035

Published: Jan. 1, 2024

The present review summarizes the current state-of-the-art in MOF-based heterojunctions three important photocatalytic processes: hydrogen evolution reaction, CO 2 photoreduction and photodegradation of dyes.

Language: Английский

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Chelated Ion‐Exchange Strategy toward BiOCl Mesoporous Single‐Crystalline Nanosheets for Boosting Photocatalytic Selective Aromatic Alcohols Oxidation

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(18)

Published: Feb. 21, 2023

The photoresponse and photocatalytic efficiency of bismuth oxychloride (BiOCl) are greatly limited by rapid recombination photogenerated carriers. construction porous single-crystal BiOCl photocatalyst can effectively alleviate this issue provide accessible active sites. Herein, a facile chelated ion-exchange strategy is developed to synthesize mesoporous single-crystalline nanosheets (BiOCl MSCN) using acetic acid ammonia solution respectively as chelating agent ionization promoter. strong chelation between acetate ions Bi3+ introduces into the precipitated product exchange with Cl- ions, resulting in large lattice mismatch, strain release, formation void-like mesopores. prepared MSCN exhibits excellent catalytic performance 99% conversion 98% selectivity for oxidation benzyl alcohol benzaldehyde superior general adaptability various aromatic alcohols. theoretical calculations characterizations confirm that mainly attributed abundant oxygen vacancies, plenty adsorption/active sites fast charge transport path without grain boundaries.

Language: Английский

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TiO2-based S-scheme photocatalysts for solar energy conversion and environmental remediation

Science China Materials, Journal Year: 2024, Volume and Issue: 67(2), P. 424 - 443

Published: Jan. 23, 2024

Language: Английский

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Enhancing photocatalytic CO2 reduction with TiO2-based materials: Strategies, mechanisms, challenges, and perspectives

Environmental Science and Ecotechnology, Journal Year: 2023, Volume and Issue: 20, P. 100368 - 100368

Published: Dec. 16, 2023

The concentration of atmospheric CO

Language: Английский

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Enhancing Built‐in Electric Fields for Efficient Photocatalytic Hydrogen Evolution by Encapsulating C₆₀ Fullerene into Zirconium‐Based Metal‐Organic Frameworks

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(11)

Published: Jan. 14, 2023

High-efficiency photocatalysts based on metal-organic frameworks (MOFs) are often limited by poor charge separation and slow charge-transfer kinetics. Herein, a novel MOF photocatalyst is successfully constructed encapsulating C60 into nano-sized zirconium-based MOF, NU-901. By virtue of host-guest interactions uneven distribution, substantial electrostatic potential difference set-up in @NU-901. The direct consequence robust built-in electric field, which tends to be 10.7 times higher @NU-901 than that found In the catalyst, photogenerated carriers efficiently separated transported surface. For example, photocatalytic hydrogen evolution reaches 22.3 mmol g-1 h-1 for @NU-901, among highest values MOFs. Our concept enhancing harnessing constitutes promising strategy design efficient solar-to-chemical energy conversion.

Language: Английский

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Enlarging the Ni–O Bond Polarizability in a Phosphorene-Hosted Metal–Organic Framework for Boosted Water Oxidation Electrocatalysis

ACS Nano, Journal Year: 2023, Volume and Issue: 17(17), P. 17254 - 17264

Published: Aug. 31, 2023

The emerging lattice-oxygen oxidation mechanism (LOM) presents attractive opportunities for breaking the scaling relationship to boost oxygen evolution reaction (OER) with direct OLattice-*O interaction. However, currently LOM-triggering rationales are still debated, and a streamlined physicochemical paradigm is extremely desirable design of LOM-defined OER catalysts. Herein, Ni metal-organic framework/black phosphorene (NiMOF/BP) heterostructure theoretically profiled constructed as catalytic platform LOM-derived studies. It found that p-type BP host can enlarge Ni-O bond polarizability NiMOF through stretching valence declining synergically. Such an enlarged will in principle alleviate lattice confinement benefit LOM pathway performance. As result, optimized NiMOF/BP catalyst exhibits promising performance low overpotential 260 mV at 10 mA cm-2 long-term stability 1 M KOH electrolyte. Both experiment calculation results suggest activated more balanced step barrier catalyst. This research puts forward criterion LOM-scaled electrocatalysts water oxidation.

Language: Английский

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Coupling Benzylamine Oxidation with CO₂ Photoconversion to Ethanol over a Black Phosphorus and Bismuth Tungstate S‐Scheme Heterojunction

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(36)

Published: June 30, 2023

Photoconversion of CO2 and H2 O into ethanol is an ideal strategy to achieve carbon neutrality. However, the production with high activity selectivity challenging owing less efficient reduction half-reaction involving multi-step proton-coupled electron transfer (PCET), a slow C-C coupling process, sluggish water oxidation half-reaction. Herein, two-dimensional/two-dimensional (2D/2D) S-scheme heterojunction consisting black phosphorus Bi2 WO6 (BP/BWO) was constructed for photocatalytic benzylamine (BA) oxidation. The as-prepared BP/BWO catalyst exhibits superior performance toward reduction, yield 61.3 μmol g-1 h-1 (selectivity 91 %).In situ spectroscopic studies theoretical calculations reveal that can effectively promote photogenerated carrier separation via Bi-O-P bridge accelerate PCET process. Meanwhile, electron-rich BP acts as active site plays vital role in process coupling. In addition, substitution BA further enhance C2 H5 OH. This work opens new horizon exploring novel heterogeneous photocatalysts photoconversion OH based on cooperative photoredox systems.

Language: Английский

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In2O3/Bi19Br3S27 S-scheme heterojunction with enhanced photocatalytic CO2 reduction

Science China Materials, Journal Year: 2024, Volume and Issue: 67(2), P. 514 - 523

Published: Jan. 17, 2024

Language: Английский

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Metal–organic framework-based S-scheme heterojunction photocatalysts

Nanoscale, Journal Year: 2024, Volume and Issue: 16(11), P. 5487 - 5503

Published: Jan. 1, 2024

A timely review on the recent advances of metal–organic framework-based step-scheme heterojunctions with respect to their synthesis, structures and applications is provided.

Language: Английский

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