Spatiotemporal imaging of charge transfer in photocatalyst particles

Nature, Journal Year: 2022, Volume and Issue: 610(7931), P. 296 - 301

Published: Oct. 12, 2022

Language: Английский

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Metal‐Organic Frameworks for Photocatalytic Water Splitting and CO₂Reduction

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(15)

Published: Jan. 23, 2023

Abstract Photocatalytic water splitting and carbon dioxide (CO 2 ) reduction provide promising solutions to global energy environmental issues. In recent years, metal‐organic frameworks (MOFs), a class of crystalline porous solids featuring well‐defined tailorable structures as well high surface areas, have captured great interest toward photocatalytic CO reduction. this review, the semiconductor‐like behavior MOFs is first discussed. We then summarize advances in over MOF‐based materials focus on unique advantage for clarifying structure‐property relationship photocatalysis. addition, some representative characterization techniques been presented unveil kinetics reaction intermediates systems. Finally, challenges, perspectives future directions are proposed.

Language: Английский

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Internal electric field in carbon nitride-based heterojunctions for photocatalysis

Nano Energy, Journal Year: 2023, Volume and Issue: 108, P. 108228 - 108228

Published: Jan. 23, 2023

Carbon nitride is one of the most promising metal-free photocatalysts to harvest solar light for energy conversion and pollutant treatment. Unfortunately, its photocatalytic performance impeded by sluggish charge carriers due high symmetry unit cells chemical structure. Fabrication an internal electric field (IEF) in carbon nitride-based evidenced be a productive strategy actuate fast separation photo-excited navigate their migrations active sites apparent quantum efficiency (AQE) throughputs. In current work, comprehensive review IEF different types heterojunctions will well presented. Emphasis put on latest progress generation hosting 2-dimensional (2D) nanosheets with dimensional materials, modulation interfacial engineering as identification monitoring. Relationships between performances various processes also enlightened. Finally, this suggest challenges future perspectives IEF-driven photocatalysis. This brings intrinsic impetus photocatalyst forefront anticipated provide guidance configure powered 2D heterostructures toward efficient environmental purification.

Language: Английский

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Metal–organic framework heterojunctions for photocatalysis

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(6), P. 3002 - 3035

Published: Jan. 1, 2024

The present review summarizes the current state-of-the-art in MOF-based heterojunctions three important photocatalytic processes: hydrogen evolution reaction, CO 2 photoreduction and photodegradation of dyes.

Language: Английский

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Photocatalysis coupling with membrane technology for sustainable and continuous purification of wastewater

Separation and Purification Technology, Journal Year: 2023, Volume and Issue: 329, P. 125225 - 125225

Published: Sept. 28, 2023

Membrane separation and photocatalytic degradation are two important technologies for wastewater purification. However, practical applications hindered by membrane fouling in the low efficiency of photocatalysis. A promising solution lies fusion photocatalysis technology, capitalizing on their respective strengths addressing weaknesses. This comprehensive review endeavours to present a thorough examination recent advancements materials reactors treatment. Key facets encompass fundamentals photodegradation, contributions different light bands waste removal, various fabrication techniques diverse types reactors, optimization operational parameters. Notably, innovative incorporation emerging photothermal effect into technology has significantly augmented its longevity Furthermore, insightful commentary will be provided assess progress made utilizing this cutting-edge pollutant removal. Ultimately, paper conclude summarizing key findings challenges associated with integration these processes. The implementation advanced potential revolutionize conventional treatment, offering sustainable environmentally friendly approach large-scale

Language: Английский

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Electronic Transmission Channels Promoting Charge Separation of Conjugated Polymers for Photocatalytic CO₂ Reduction with Controllable Selectivity

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(22)

Published: April 3, 2023

Conjugated polymers (CPs) represent a promising platform for photocatalytic CO2 fixation owing to their suitable band structures that meet the requirements of reduction potential value-added fuels. However, performance CPs is rather restrained by low charge transfer efficiency. Herein, we rationally designed three with more delocalized electronic transmission channel and planar molecular structure, which are regarded evidently reduce exciton binding energy (Eb ) accelerate internal process. Besides, assembly electron-output "tentacles" cocatalysts on surface could effectively facilitate interfacial electron delivery. Accordingly, optimal P-2CN exhibits an apparent quantum yield 4.6 % at 420 nm CO. Further adjusting amounts cyano groups cocatalysts, CO selectivity be obtained in range 0-80.5 %.

Language: Английский

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In Situ Characterization Techniques Applied in Photocatalysis: A Review

Advanced Materials Interfaces, Journal Year: 2022, Volume and Issue: 10(3)

Published: Dec. 22, 2022

Abstract Photocatalysis, as one of the hopeful technologies to overcome issues energy shortage and environmental pollution, has increasingly attracted attention. In situ characterization technology, which can observe dynamic changes catalysts in photocatalytic reaction real time, plays a crucial part development designing highly efficient photocatalysts investigating their mechanism. This review introduces summarizes primary applications techniques photocatalysis, including investigation morphology chemical structure photocatalysts, photogenerated charges transfer, spatial distribution, surface pathways. Suggestions for future photocatalysis have prospected at end.

Language: Английский

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Gradient tungsten-doped Bi3TiNbO9 ferroelectric photocatalysts with additional built-in electric field for efficient overall water splitting

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

Published: Dec. 1, 2023

Bi3TiNbO9, a layered ferroelectric photocatalyst, exhibits great potential for overall water splitting through efficient intralayer separation of photogenerated carriers motivated by depolarization field along the in-plane a-axis. However, poor interlayer transport out-of-plane c-axis, caused significant barrier between layers, leads to high probability carrier recombination and consequently results in low photocatalytic activity. Here, we have developed an photocatalyst consisting Bi3TiNbO9 nanosheets with gradient tungsten (W) doping c-axis. This generation additional electric c-axis simultaneously enhances magnitude within layers a-axis due strengthened structural distortion. The combination built-in polarization can effectively facilitate anisotropic migration electrons holes basal {001} surface lateral {110} nanosheets, respectively, enabling desirable spatial carriers. Hence, W-doped Rh/Cr2O3 cocatalyst achieves durable feature, thereby providing effective pathway designing excellent photocatalysts.

Language: Английский

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Crystal Facet Engineering on SrTiO₃ Enhances Photocatalytic Overall Water Splitting

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(10), P. 6618 - 6627

Published: Feb. 13, 2024

Single-crystal semiconductor-based photocatalysts exposing unique crystallographic facets show promising applications in energy and environmental technologies; however, crystal facet engineering through solid-state synthesis for photocatalytic overall water splitting is still challenging. Herein, we develop a novel strategy recrystallization to synthesize uniform SrTiO3 single crystals tailored {111} facets. The presynthesized low-crystalline precursors enable the formation of well-defined kinetically improved structure transformation during process. By employing subtle Al3+ ions as surface morphology modulators, orientation can be precisely tuned controlled percentage activity increases with exposure Owing outstanding crystallinity favorable anisotropic structure, 36.6% lead 3-fold enhancement hydrogen evolution rates up 1.55 mmol·h–1 stoichiometric ratio 2:1 than thermodynamically stable enclosed isotropic {100}

Language: Английский

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Roadmap on exsolution for energy applications

Journal of Physics Energy, Journal Year: 2023, Volume and Issue: 5(3), P. 031501 - 031501

Published: April 28, 2023

Abstract Over the last decade, exsolution has emerged as a powerful new method for decorating oxide supports with uniformly dispersed nanoparticles energy and catalytic applications. Due to their exceptional anchorage, resilience various degradation mechanisms, well numerous ways in which they can be produced, transformed applied, exsolved have set standards terms of activity, durability functionality. In conjunction multifunctional such perovskite oxides, becomes platform design advanced materials. following sections, we review current status approach, seeking facilitate transfer ideas between different fields application. We also explore future directions research, particularly noting multi-scale development required take concept forward, from fundamentals through operando studies pilot scale demonstrations.

Language: Английский

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