S-Scheme Heterojunction Photocatalyst

Chem, Journal Year: 2020, Volume and Issue: 6(7), P. 1543 - 1559

Published: June 26, 2020

Language: Английский

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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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2D/2D/0D TiO2/C3N4/Ti3C2 MXene composite S-scheme photocatalyst with enhanced CO2 reduction activity

Applied Catalysis B Environment and Energy, Journal Year: 2020, Volume and Issue: 272, P. 119006 - 119006

Published: April 19, 2020

Language: Английский

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An Inorganic/Organic S‐Scheme Heterojunction H₂‐Production Photocatalyst and its Charge Transfer Mechanism

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(22)

Published: April 26, 2021

Abstract Inspired by natural photosynthesis, constructing inorganic/organic heterojunctions is regarded as an effective strategy to design high‐efficiency photocatalysts. Herein, a step (S)‐scheme heterojunction photocatalyst prepared in situ growth of inorganic semiconductor firmly on organic semiconductor. A new pyrene‐based conjugated polymer, pyrene‐ alt ‐triphenylamine (PT), synthesized via the typical Suzuki–Miyaura reactions, and then employed substrate anchor CdS nanocrystals. The optimized CdS/PT composite, coupling 2 wt% PT with CdS, exhibits robust H evolution rate 9.28 mmol h −1 g continuous release bubbles, well high apparent quantum efficiency 24.3%, which ≈8 times that pure CdS. S‐scheme charge transfer mechanism between systematically demonstrated photoirradiated Kelvin probe measurement irradiated X‐ray photoelectron spectroscopy analyses. This work provides protocol for preparing specific photocatalysts basis coupling.

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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Sulfur-doped g-C3N4/TiO2 S-scheme heterojunction photocatalyst for Congo Red photodegradation

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2020, Volume and Issue: 42(1), P. 56 - 68

Published: May 30, 2020

Language: Английский

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A review on heterogeneous photocatalysis for environmental remediation: From semiconductors to modification strategies

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2022, Volume and Issue: 43(2), P. 178 - 214

Published: Jan. 17, 2022

Language: Английский

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In situ construction of S-scheme AgBr/BiOBr heterojunction with surface oxygen vacancy for boosting photocatalytic CO2 reduction with H2O

Applied Catalysis B Environment and Energy, Journal Year: 2021, Volume and Issue: 301, P. 120802 - 120802

Published: Oct. 11, 2021

Language: Английский

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Design, Fabrication, and Mechanism of Nitrogen‐Doped Graphene‐Based Photocatalyst

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(9)

Published: Jan. 18, 2021

Solving energy and environmental problems through solar-driven photocatalysis is an attractive challenging topic. Hence, various types of photocatalysts have been developed successively to address the demands photocatalysis. Graphene-based materials elicited considerable attention since discovery graphene. As a derivative graphene, nitrogen-doped graphene (NG) particularly stands out. Nitrogen atoms can break undifferentiated structure open bandgap while endowing with uneven electron density distribution. Therefore, NG retains nearly all advantages original equipped several novel properties, ensuring infinite possibilities for NG-based This review introduces atomic band structures NG, summarizes in situ ex synthesis methods, highlights mechanism photocatalysis, outlines its applications different directions (primarily hydrogen production, CO2 reduction, pollutant degradation, as photoactive ingredient). Lastly, central challenges possible improvements future are presented. study expected learn from past achieve progress toward

Language: Английский

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Designing 3D‐MoS₂Sponge as Excellent Cocatalysts in Advanced Oxidation Processes for Pollutant Control

Angewandte Chemie International Edition, Journal Year: 2020, Volume and Issue: 59(33), P. 13968 - 13976

Published: May 9, 2020

Abstract 3D‐MoS 2 can adsorb organic molecules and provide multidimensional electron transport pathways, implying a potential application for environment remediation. Here, we study the degradation of aromatic organics in advanced oxidation processes (AOPs) by sponge loaded with MoS nanospheres graphene oxide (GO). Exposed Mo 4+ active sites on significantly improve concentration stability Fe 2+ AOPs keep 3+ /Fe stable dynamic cycle, thus effectively promoting activation H O /peroxymonosulfate (PMS). The rate pollutants system is about 50 times higher than without cocatalyst. After 140 L pilot‐scale experiment, it still maintains high efficiency activity. 16 days continuous reaction, achieves 120 mg −1 antibiotic wastewater up to 97.87 %. operating cost treating ton only US$ 0.33, suggesting huge industrial applications.

Language: Английский

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