Metal-Free 2D/2D van der Waals Heterojunction Based on Covalent Organic Frameworks for Highly Efficient Solar Energy Catalysis

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Май 22, 2023

Abstract Covalent organic frameworks (COFs) have emerged as a kind of rising star materials in photocatalysis. However, their photocatalytic activities are restricted by the high photogenerated electron–hole pairs recombination rate. Herein, novel metal-free 2D/2D van der Waals heterojunction, composed two-dimensional (2D) COF with ketoenamine linkage (TpPa-1-COF) and 2D defective hexagonal boron nitride ( h -BN), is successfully constructed through situ solvothermal method. Benefitting from presence VDW larger contact area intimate electronic coupling can be formed between interface TpPa-1-COF -BN, which make contributions to promoting charge carriers separation. The introduced defects also endow -BN porous structure, thus providing more reactive sites. Moreover, will undergo structural transformation after being integrated enlarge gap conduction band position TpPa-1-COF, suppress electron backflow, corroborated experimental density functional theory calculations results. Accordingly, resulting -BN/TpPa-1-COF heterojunction displays outstanding solar energy catalytic activity for water splitting without co-catalysts, H 2 evolution rate reach up 3.15 mmol g −1 , about 67 times greater than that pristine surpassing state-of-the-art metal-free-based photocatalysts reported date. In particular, it first work constructing COFs-based heterojunctions help may provide new avenue designing highly efficient evolution.

Язык: Английский

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Functionalized graphitic carbon nitride based catalysts in solar-to-chemical conversion for hydrogen peroxide production

Chemical Engineering Journal, Год журнала: 2023, Номер 466, С. 142931 - 142931

Опубликована: Апрель 12, 2023

Язык: Английский

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A recent prospective and progress on MXene-based photocatalysts for efficient solar fuel (hydrogen) generation via photocatalytic water-splitting

International Journal of Hydrogen Energy, Год журнала: 2023, Номер 53, С. 1242 - 1258

Опубликована: Дек. 21, 2023

Язык: Английский

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Mechanism, modification and application of silver-based photocatalysts

Materials Today Sustainability, Год журнала: 2023, Номер 22, С. 100409 - 100409

Опубликована: Апрель 27, 2023

Язык: Английский

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Constructing CdIn2S4/ZnS type-I band alignment heterojunctions by decorating CdIn2S4 on ZnS microspheres for efficient photocatalytic H2 evolution

International Journal of Hydrogen Energy, Год журнала: 2023, Номер 48(95), С. 37224 - 37233

Опубликована: Июнь 26, 2023

Язык: Английский

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Cyano‐Rich g‐C₃N₄ in Photochemistry: Design, Applications, and Prospects

Small, Год журнала: 2023, Номер 20(2)

Опубликована: Сен. 5, 2023

Abstract Cyano‐rich g‐C 3 N 4 materials are widely used in various fields of photochemistry due to the very powerful electron‐absorbing ability and electron storage function cyano, as well its advantages improving light absorption, adjusting energy band structure, increasing polarization rate density active site concentration, promoting oxygen activation ability. Notwithstanding, there is yet a huge knowledge break design, preparation, detection, application, prospect cyano‐rich . Accordingly, an overall review arranged substantially comprehend research progress position materials. An overview current synthesis, characterization (determination their location quantity), reaction mechanism analysis provide quantity novel suggestions for cyano‐modified carbon nitride materials' construction provided. In view prevailing challenges outlooks materials, this paper will purify growth direction , achieve more in‐depth exploration broaden applications

Язык: Английский

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Synergistic enhancement of photocatalytic hydrogen evolution by ultrathin oxygen-doped graphitic carbon nitride nanosheets loaded amorphous mesoporous nickel hydroxide

Separation and Purification Technology, Год журнала: 2023, Номер 330, С. 125366 - 125366

Опубликована: Окт. 13, 2023

Язык: Английский

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Solar‐Driven Biomass Reforming for Hydrogen Generation: Principles, Advances, and Challenges

Advanced Science, Год журнала: 2024, Номер 11(29)

Опубликована: Май 30, 2024

Abstract Hydrogen (H 2 ) has emerged as a clean and versatile energy carrier to power carbon‐neutral economy for the post‐fossil era. generation from low‐cost renewable biomass by virtually inexhaustible solar presents an innovative strategy process organic solid waste, combat crisis, achieve carbon neutrality. Herein, progress breakthroughs in solar‐powered H production are reviewed. The basic principles of solar‐driven first introduced better understanding reaction mechanism. Next, merits shortcomings various semiconductors cocatalysts summarized, strategies addressing related issues also elaborated. Then, bio‐based feedstocks reviewed with emphasis on effect photocatalysts catalytic systems performance. Of note, concurrent value‐added chemicals reforming is emphasized well. Meanwhile, emerging photo‐thermal coupling that shows grand prospect maximally utilizing entire spectrum discussed. Further, direct utilization hydrogen green reductant producing via reactions highlighted. Finally, challenges perspectives photoreforming toward envisioned.

Язык: Английский

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Photocatalytic Performance of MXenes co-catalyst in Hydrogen (H2) production via photocatalytic water splitting: A review

Journal of Alloys and Compounds, Год журнала: 2024, Номер 1005, С. 175951 - 175951

Опубликована: Авг. 13, 2024

Язык: Английский

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Impact of Hole Scavengers on Efficient Photocatalytic Hydrogen Production

Advanced Sustainable Systems, Год журнала: 2024, Номер 8(12)

Опубликована: Авг. 22, 2024

Abstract Hydrogen is one of the most promising alternative energy resources to replace fossil feedstocks, with so‐called “green” hydrogen, derived by water splitting (WS) using renewable electricity or sunlight, sustainable. Photocatalytic hydrogen production, in which sunlight sole input, has been extensively studied, and requires creation photogenerated excitons (through irradiation semiconductors) their transport aqueous media. Chemical scavengers, notably electron donating molecules, are widely used quench holes thereby suppress exciton recombination otherwise limits yield. Despite prevalence, role significance such scavengers (also termed sacrificial agents) photocatalytic WS remains poorly understood, hindering rational selection. This review focuses on importance donors WS, participation reaction mechanism.

Язык: Английский

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