Emerging S‐Scheme Photocatalyst

Advanced Materials, Journal Year: 2021, Volume and Issue: 34(11)

Published: Dec. 28, 2021

Photocatalysis is a green technology to use ubiquitous and intermittent sunlight. The emerging S-scheme heterojunction has demonstrated its superiority in photocatalysis. This article covers the state-of-the-art progress provides new insights into general designing criteria. It starts with challenges confronted by single photocatalyst from perspective of energy dissipation borrowing common behaviors dye molecule. Subsequently, other problems faced are summarized. Then viable solution for these construction heterojunctions. To overcome mistakes type-II Z-scheme heterojunctions, proposed underlying reaction mechanism Afterward, design principles four types heterojunctions suggested. Following this, direct characterization techniques testifying charge transfer presented. Finally, different photocatalytic applications Specifically, this work endeavors clarify critical understanding on curved Fermi level interface, which can help strengthen advance fundamental theories Moreover, current prospects critically discussed.

Language: Английский

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In situ Irradiated XPS Investigation on S‐Scheme TiO₂@ZnIn₂S₄ Photocatalyst for Efficient Photocatalytic CO₂ Reduction

Small, Journal Year: 2021, Volume and Issue: 17(41)

Published: Sept. 12, 2021

Reasonable design of efficient hierarchical photocatalysts has gained significant attention. Herein, a step-scheme (S-scheme) core-shell TiO2 @ZnIn2 S4 heterojunction is designed for photocatalytic CO2 reduction. The optimized sample exhibits much higher photoreduction conversion rates (the sum yield CO, CH3 OH, and CH4 ) than the blank control, i.e., ZnIn2 . improved performance can be attributed to inhibited recombination photogenerated charge carriers induced by S-scheme heterojunction. improvement also large specific surface areas abundant active sites. Meanwhile, transfer mechanism testified in situ irradiated X-ray photoelectron spectroscopy, work function calculation, electron paramagnetic resonance measurements. This provides an effective strategy designing highly solar fuels.

Language: Английский

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Challenges for photocatalytic overall water splitting

Chem, Journal Year: 2022, Volume and Issue: 8(6), P. 1567 - 1574

Published: May 6, 2022

Language: Английский

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Efficient photocatalytic hydrogen evolution over graphdiyne boosted with a cobalt sulfide formed S-scheme heterojunction

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2022, Volume and Issue: 43(2), P. 303 - 315

Published: Jan. 17, 2022

Language: Английский

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Inorganic Metal‐Oxide Photocatalyst for H₂O₂ Production

Small, Journal Year: 2021, Volume and Issue: 18(8)

Published: Oct. 29, 2021

Abstract Hydrogen peroxide (H 2 O ) is a mild but versatile oxidizing agent with extensive applications in bleaching, wastewater purification, medical treatment, and chemical synthesis. The state‐of‐art H production via anthraquinone oxidation hardly considered cost‐efficient environment‐friendly process because it requires high energy input generates hazardous organic wastes. Photocatalytic green, sustainable, inexpensive which only needs water gaseous dioxygen as the raw materials sunlight power source. Inorganic metal oxide semiconductors are good candidates for photocatalytic due to their abundance nature, biocompatibility, exceptional stability, low cost. Progress has been made enhance activity toward production, however, photosynthesis still laboratory research phase since productivity far from satisfaction. To inspire innovative ideas boosting yield photocatalysis, most well‐studied photocatalysts selected modification strategies improve listed. mechanisms over modified discussed highlight facilitating role of methods. Besides, methods quantification associated radical intermediates provided guide future studies this field.

Language: Английский

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Hierarchically Porous ZnO/g-C₃N₄ S-Scheme Heterojunction Photocatalyst for Efficient H₂O₂ Production

Langmuir, Journal Year: 2021, Volume and Issue: 37(48), P. 14114 - 14124

Published: Nov. 22, 2021

The design of photocatalysts with hierarchical pore sizes is an effective method to improve mass transport, enhance light absorption, and increase specific surface area. Moreover, the construction a heterojunction at interface two semiconductor suitable band positions plays crucial role in separating transporting charge carriers. Herein, ZIF-8 urea are used as precursors prepare hierarchically porous ZnO/g-C3N4 S-scheme through two-step calcination method. This photocatalyst shows high activity toward photocatalytic H2O2 production, which 3.4 5.0 times higher than that pure g-C3N4 ZnO, respectively. mechanism transfer separation within studied by Kelvin probe, situ irradiated X-ray photoelectron spectroscopy (ISI-XPS), electron paramagnetic resonance (EPR). research provides idea designing pores efficient hydrogen peroxide production.

Language: Английский

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A Bifunctional CdS/MoO₂/MoS₂ Catalyst Enhances Photocatalytic H₂ Evolution and Pyruvic Acid Synthesis

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(44)

Published: Sept. 10, 2022

The best use of photogenerated electrons and holes is crucial to boosting photocatalytic activity. Herein, a bifunctional dual-cocatalyst-modified photocatalyst constructed based on CdS/MoO2 /MoS2 hollow spheres for hydrogen evolution coupled with selective pyruvic acid (PA) production from lactic (LA) oxidation. MoS2 MoO2 are simultaneously obtained the conversion CdMoO4 in one step. In process, function as reduction oxidation centers which accumulate used reaction (HER) PA synthesis, respectively. By monitoring intermediates, two-step single-electron route proposed, initiated by cleavage α-C(sp3 )-H bond LA. LA selectivity can reach ca. 29 % 95 after five-hour reaction,

Language: Английский

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Review on g-C3N4-based S-scheme heterojunction photocatalysts

Journal of Material Science and Technology, Journal Year: 2022, Volume and Issue: 125, P. 128 - 144

Published: April 18, 2022

Language: Английский

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Optimizing Atomic Hydrogen Desorption of Sulfur‐Rich NiS_1+x Cocatalyst for Boosting Photocatalytic H₂ Evolution

Advanced Materials, Journal Year: 2021, Volume and Issue: 34(6)

Published: Nov. 23, 2021

Low-cost transition-metal chalcogenides (MSx ) are demonstrated to be potential candidate cocatalyst for photocatalytic H2 generation. However, their -generation performance is limited by insufficient quantities of exposed sulfur (S) sites and strong bonding with adsorbed hydrogen atoms (SHads ). To address these issues, an efficient coupling strategy active-site-enriched regulation electronic structure modification active S developed rational design core-shell Au@NiS1+x nanostructured cocatalyst. In this case, the can skillfully fabricated synthesize modified TiO2 (denoted as /Au@NiS1+x a two-step route. Photocatalytic experiments exhibit that resulting (1.7:1.3) displays boosted rate 9616 µmol h-1 g-1 apparent quantum efficiency 46.0% at 365 nm, which 2.9 1.7 times over /NiS1+x /Au, respectively. situ/ex situ XPS characterization density functional theory calculations reveal free-electrons Au transfer sulfur-enriched NiS1+x induce generation electron-enriched Sδ- centers, boosts desorption Hads rapid formation via weakening SHads bonds. Hence, -mediated mechanism proposed. This work delivers universal simultaneously increasing site number optimizing binding strength between adsorbates.

Language: Английский

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ZnIn2S4-based photocatalysts for photocatalytic hydrogen evolution via water splitting

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 475, P. 214898 - 214898

Published: Oct. 22, 2022

Language: Английский

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