Recent Progress on Semiconductor Heterogeneous Photocatalysts in Clean Energy Production and Environmental Remediation

Catalysts, Journal Year: 2023, Volume and Issue: 13(7), P. 1102 - 1102

Published: July 14, 2023

Semiconductor-based photocatalytic reactions are a practical class of advanced oxidation processes (AOPs) to address energy scarcity and environmental pollution. By utilizing solar as clean, abundant, renewable source, this process offers numerous advantages, including high efficiency, eco-friendliness, low cost. In review, we present several methods construct various photocatalyst systems with excellent visible light absorption efficient charge carrier separation ability through the optimization materials design reaction conditions. Then it introduces fundamentals photocatalysis in both clean generation remediation. other parts, introduce approaches enhance activity by applying different strategies, semiconductor structure modification (e.g., morphology regulation, co-catalysts decoration, doping, defect engineering, surface sensitization, heterojunction construction) tuning optimizing conditions (such concentration, initial contaminant pH, temperature, intensity, charge-carrier scavengers). Then, comparative study on performance recently examined photocatalysts applied production remediation will be discussed. To realize these goals, H2 via water splitting, CO2 reduction value-added products, dye, drug photodegradation lessen toxic chemicals, presented. Subsequently, report dual-functional for simultaneous pollutant reactions. brief discussion about industrial economical applications is described. The follows introducing application artificial intelligence machine learning selection an innovative issues. Finally, summary future research directions toward developing significantly improved efficiency stability provided.

Language: Английский

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Nearly 100% selective and visible-light-driven methane conversion to formaldehyde via. single-atom Cu and Wδ+

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: May 10, 2023

Direct solar-driven methane (CH4) reforming is highly desirable but challenging, particularly to achieve a value-added product with high selectivity. Here, we identify synergistic ensemble effect of atomically dispersed copper (Cu) species and partially reduced tungsten (Wδ+), stabilised over an oxygen-vacancy-rich WO3, which enables exceptional photocatalytic CH4 conversion formaldehyde (HCHO) under visible light, leading nearly 100% selectivity, very yield 4979.0 μmol·g-1 within 2 h, the normalised mass activity 8.5 × 106 μmol·g-1Cu·h-1 HCHO at ambient temperature. In-situ EPR XPS analyses indicate that Cu serve as electron acceptor, promoting photo-induced transfer from conduction band O2, generating reactive •OOH radicals. In parallel, adjacent Wδ+ act hole acceptor preferred adsorption activation site H2O produce hydroxyl radicals (•OH), thus activate methyl (•CH3). The synergy dual active sites boosts overall efficiency selectivity process.

Language: Английский

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Modulating built-in electric field via Bi-VO4-Fe interfacial bridges to enhance charge separation for efficient photoelectrochemical water splitting

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 672, P. 12 - 20

Published: May 31, 2024

Language: Английский

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Recent advanced strategies for bimetallenes toward electrocatalytic energy conversion reactions

Chemical Communications, Journal Year: 2024, Volume and Issue: 60(23), P. 3129 - 3137

Published: Jan. 1, 2024

Designing low-dimensional nanomaterials is vital to address the energy and environmental crisis by means of electrocatalytic conversion reactions. Bimetallenes, as an emerging class 2D materials, present promise for By leveraging atomically thin layers, bimetallenes unsaturated surface coordination, high specific area conductivity, which are all indispensable features heterogeneous electrochemical However, intrinsic activity stability needs be improved further bimetallene electrocatalysts, due higher demands practical applications. Recently, many strategies have been developed optimize chemical or electronic structure accommodate transfer reactants, adsorption desorption intermediates, dissociation products. Considering that most such work focuses on adjusting structure, this review offers in-depth insight into recent representative optimizing mainly including alloying, strain effects, ligand defects heteroatom doping. Moreover, summarizing performance optimized using various strategies, we provide a understand structure-property relationships. In addition, future prospects challenges discussed development electrocatalysts.

Language: Английский

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Particle‐Based Photoelectrodes for PEC Water Splitting: Concepts and Perspectives

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(37)

Published: April 15, 2024

Abstract This comprehensive review delves into the intricacies of photoelectrochemical (PEC) water splitting process, specifically focusing on design, fabrication, and optimization particle‐based photoelectrodes for efficient green hydrogen production. These photoelectrodes, composed semiconductor materials, potentially harness light energy generate charge carriers, driving oxidation reduction reactions. The versatility as a platform investigating enhancing various candidates is explored, particularly emerging complex oxides with compelling transfer properties. However, challenges presented by many factors influencing performance stability these including particle size, shape, composition, morphology, surface modification, electrode configuration, are highlighted. introduces fundamental principles PEC splitting, presents an exhaustive overview different synthesis methods powders their assembly discusses recent advances in photoelectrode material development. It concludes offering promising strategies improving stability, such adoption novel architectures heterojunctions.

Language: Английский

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Metal vacancies in semiconductor oxides enhance hole mobility for efficient photoelectrochemical water splitting

Nature Catalysis, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 25, 2025

Language: Английский

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Suppressing Defects‐Induced Non‐Radiative Recombination for Activating the Near‐Infrared Photoactivity of Red Polymeric Carbon Nitride

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(52)

Published: Sept. 13, 2023

Abstract Many cases of light absorption modification exceeding 700 nm or near‐infrared (NIR) are reported for capturing more than half the solar energy, however, very few modifications can produce NIR photoactivity due to inevitably introduced defects‐induced non‐radiative recombination. Here, taking four kinds C/O co‐doped red polymeric carbon nitride as examples, defect‐repairing is carried out using alkali metal molten‐salts (LiCl/NaCl and LiCl/KCl) solid‐salt (KCl) activate their photoactivity. The defect repair results from passivation valence electron pairing formation crystalline polyheptazine imide structure with complete polymerization. More importantly, it sharply eliminates bulk defects (such vacancy nitrogen vacancy) by co‐doping. Since structural in most photocatalysts during expanding absorption, this proposed strategy bound be universal suppressing recombination

Language: Английский

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Sustainable catalytic strategies for the transformation of plastic wastes into valued products

Chemical Engineering Science, Journal Year: 2023, Volume and Issue: 276, P. 118729 - 118729

Published: April 7, 2023

Language: Английский

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The Positive Versus Negative Effects of Defect Engineering for Solar Water Splitting: A Review

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(47)

Published: Sept. 3, 2023

Abstract Although defect design is an essential means of improving the performance photocatalytic materials, introduction not always beneficial. Current engineering focuses on avoiding or modifying introduced defects to mitigate their adverse effects solar water splitting performance. This review comprehensively summarizes strategies for and discusses crucial roles in splitting. Focusing dual defects, most basic schemes preparing favorable through pretreatment posttreatment methods are reviewed. In addition, overcoming mitigating detrimental improve photocatalysts. Finally, challenges prospects developing a defect‐based photocatalyst strategy outlined. provides reference photocatalysts conducting more in‐depth research defects. Additionally, it offers ideas utilizing unfavorable converting them into improvement.

Language: Английский

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Superhydrophilic CoFe Dispersion of Hydrogel Electrocatalysts for Quasi-Solid-State Photoelectrochemical Water Splitting

ACS Nano, Journal Year: 2023, Volume and Issue: 17(21), P. 22071 - 22081

Published: Oct. 30, 2023

Photoelectrochemical (PEC) water splitting is an attractive strategy to convert solar energy hydrogen. However, the lifetime of PEC devices restricted by photocorrosion semiconductors and instability co-catalysts. Herein, we report a feasible in situ inherent cross-linking method for stabilizing that uses CoFe-dispersed polyacrylamide (PAM) hydrogel as transparent protector. The CoFe-PAM protected BiVO4 (BVO) photoanode reached photocurrent density 5.7 mA cm–2 at 1.23 VRHE under AM 1.5G illumination with good stability. PAM network improved loading Fe sites while enabling retention more CoFe co-catalysts increasing electron reaction active sites, further improving performance More importantly, tuning polymerization network, pioneer use quasi-solid-state electrolytes photoelectrochemistry, where high concentration ionic solvent ensures effective charge transport storage owing hydrophilic porous structure hydrogel. This work expands scope research providing class three-dimensional electrocatalysts huge extension potential, versatility these can be employed other semiconductors.

Language: Английский

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