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, Год журнала: 2021, Номер 301, С. 120802 - 120802

Опубликована: Окт. 11, 2021

Язык: Английский

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Piezo‐Photocatalysis over Metal–Organic Frameworks: Promoting Photocatalytic Activity by Piezoelectric Effect

Advanced Materials, Год журнала: 2021, Номер 33(51)

Опубликована: Окт. 13, 2021

The built-in electric field can be generated in the piezoelectric materials under mechanical stress. resulting effect is beneficial to charge separation photocatalysis. Meanwhile, stress usually gives rise accelerated mass transfer and enhanced catalytic activity. Unfortunately, it remains a challenge differentiate contribution of these two factors performance. Herein, for first time, isostructural metal-organic frameworks (MOFs), i.e., UiO-66-NH2 (Zr) (Hf), are adopted piezo-photocatalysis. Both MOFs, featuring same structures except diverse Zr/Hf-oxo clusters, possess distinctly different properties. Strikingly, (Hf) exhibits ≈2.2 times activity compared with that simultaneous light ultrasonic irradiation, though both MOFs display similar photocatalytic H2 production without irradiation. Given their pore features behaviors, difference unambiguously assignable effect. As result, contributions piezo-photocatalysis clearly distinguished owing stronger property (Hf).

Язык: Английский

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2D materials and heterostructures for photocatalytic water-splitting: a theoretical perspective

Journal of Physics D Applied Physics, Год журнала: 2022, Номер 55(29), С. 293002 - 293002

Опубликована: Фев. 22, 2022

Abstract Photocatalytic water-splitting for hydrogen generation by sunlight provides a new route to address energy and environmental problems. In recent years, tremendous efforts have been devoted designing highly efficient photocatalysts (PCs). Adequate light absorption, effective photogenerated carrier separation, sufficiently large overpotentials water redox are crucial in achieving high solar-to-hydrogen (STH) efficiency. These parameters thus strongly influence the design of novel photocatalytic materials. Two-dimensional (2D) PCs flourished because their specific surface area ratio, short migration distance compared bulk PCs, enormous flexibility via van der Waals heterostructure (HS) engineering many other unique capabilities that meet criteria high-efficiency STH conversion. this review, we summarize developments 2D materials HSs applications from theoretical perspective. Specifically, first discuss number employed water-splitting. We review various strategies material modulate enhance performance improving harvesting such as introduction defects dopants, application strain, external electric field, rotation angles ferroelectric switching. then methods evaluate evolution reaction, oxygen reaction Finally, opportunities challenges presented.

Язык: Английский

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S-scheme heterojunction of crystalline carbon nitride nanosheets and ultrafine WO3 nanoparticles for photocatalytic CO2 reduction

Journal of Environmental Sciences, Год журнала: 2023, Номер 140, С. 103 - 112

Опубликована: Май 30, 2023

Язык: Английский

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Tailor‐Engineered 2D Cocatalysts: Harnessing Electron–Hole Redox Center of 2D g‐C₃N₄ Photocatalysts toward Solar‐to‐Chemical Conversion and Environmental Purification

Advanced Functional Materials, Год журнала: 2022, Номер 32(29)

Опубликована: Фев. 23, 2022

Abstract Sparked by natural photosynthesis, solar photocatalysis using metal‐free graphitic carbon nitride (g‐C 3 N 4 ) with appealing electronic structure has turned up as the most captivating technique to quest for sustainable energy generation and pollution‐free environment. Nonetheless, low‐dimensional g‐C is thwarted from sluggish kinetics rapid recombination of photogenerated carriers upon light irradiation. Among multifarious modification strategies, engineering 2D cocatalysts anticipated accelerate redox kinetics, augment active sites ameliorate electron–hole separation boosted activity thanks its face‐to‐face contact surface. It timely technological significance review 2D/2D interfaces state‐of‐the‐art cocatalysts, spanning carbon‐containing phosphorus‐containing, metal dichalcogenide, other cocatalysts. Fundamental principles each photocatalytic application will be introduced. Thereafter, recent advances cocatalyst‐mediated systems critically evaluated based on their interfacial engineering, emerging roles, impacts toward stability catalytic efficiency. Importantly, mechanistic insights into charge dynamics structure–performance relationship deciphered. Last, noteworthy research directions are prospected deliver insightful ideas future development . Overall, this serve a scaffold cornerstone in designing dimensionality‐dependent cocatalyst‐assisted renewable ecologically green

Язык: Английский

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Piezocatalytic Techniques in Environmental Remediation

Angewandte Chemie International Edition, Год журнала: 2022, Номер 62(5)

Опубликована: Ноя. 1, 2022

Abstract As a consequence of rapid industrialization throughout the world, various environmental pollutants have begun to accumulate in water, air, and soil. This endangers ecological environment earth, remediation has become an immediate priority. Among techniques, piezocatalytic which uniquely take advantage piezoelectric effect, attracted much attention. Piezoelectric effects allow pollutant degradation directly, while also enhancing photocatalysis by reducing recombination photogenerated carriers. In this Review, we provide comprehensive summary recent developments techniques for remediation. The origin effect as well classification materials their application are systematically summarized. We analyze potential underlying mechanisms. Finally, urgent problems future development discussed.

Язык: Английский

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Double-defect-induced polarization enhanced OV-BiOBr/Cu2−xS high-low junction for boosted photoelectrochemical hydrogen evolution

Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 314, С. 121502 - 121502

Опубликована: Май 13, 2022

Язык: Английский

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Recent Progress in the Synthesis and Applications of Composite Photocatalysts: A Critical Review

Small Methods, Год журнала: 2021, Номер 6(2)

Опубликована: Дек. 16, 2021

Photocatalysis is an advanced technique that transforms solar energy into sustainable fuels and oxidizes pollutants via the aid of semiconductor photocatalysts. The main scientific technological challenges for effective photocatalysis are stability, robustness, efficiency For practical applications, researchers trying to develop highly efficient stable Since literature scattered, it urgent write a critical review summarizes state-of-the-art progress in design variety composite photocatalysts environmental applications. Herein, comprehensive presented overview, history, mechanism, advantages, photocatalysis. Further, recent advancements heterostructure including alloy quantum dots based composites, carbon composites nanotubes, dots, graphitic nitride, graphene, covalent-organic frameworks metal carbides, halide perovskites, nitrides, oxides, phosphides, sulfides, metal-organic plasmonic materials single atom CO2 conversion, H2 evolution, oxidation discussed elaborately. Finally, perspectives further improvement provided.

Язык: Английский

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Photocatalytic nitrogen reduction to ammonia: Insights into the role of defect engineering in photocatalysts

Nano Research, Год журнала: 2021, Номер 15(4), С. 2773 - 2809

Опубликована: Сен. 4, 2021

Abstract Engineering of defects in semiconductors provides an effective protocol for improving photocatalytic N 2 conversion efficiency. This review focuses on the state-of-the-art progress defect engineering photocatalysts reduction toward ammonia. The basic principles and mechanisms thermal catalyzed photon-induced are first concisely recapped, including relevant properties molecule, reaction pathways, NH 3 quantification methods. Subsequently, classification, synthesis strategies, identification techniques compendiously summarized. Advances situ characterization monitoring state during process also described. Especially, various surface strategies their critical roles photoreduction performance highlighted, vacancies (i.e., anionic cationic vacancies), heteroatom doping metal element nonmetal doping), atomically defined sites. Finally, future opportunities challenges as well perspectives further development defect-engineered nitrogen to ammonia presented. It is expected that this can provide a profound guidance more specialized design catalysts with high activity stability photochemical fixation.

Язык: Английский

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Roles of Graphene Oxide in Heterogeneous Photocatalysis

ACS Materials Au, Год журнала: 2021, Номер 1(1), С. 37 - 54

Опубликована: Авг. 9, 2021

Graphene oxide (GO) has been widely utilized as the precursor of graphene (GR) to fabricate GR-based hybrid photocatalysts for solar-to-chemical energy conversion. However, until now, properties and roles that GO played in heterogeneous photocatalysis have remained relatively elusive. In this Review, we start with a brief discussion synthesis structure GO. Then, photocatalysis-related GO, including electrical conductivity, surface chemistry, dispersibility, semiconductor properties, are concisely summarized. particular, highlighted fundamental multifaceted photocatalysis, which contain GR, cross-linked framework constructing aerogel photocatalyst, macromolecular surfactant, two-dimensional growth template, photocatalyst by itself. Furthermore, future prospects remaining challenges on developing effective GO-derived presented, is expected inspire further research into promising domain.

Язык: Английский

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