Highly Selective Photoconversion of CO₂ to CH₄ over SnO₂/Cs₃Bi₂Br₉ Heterojunctions Assisted by S-Scheme Charge Separation

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(19), P. 12623 - 12633

Published: Sept. 13, 2023

Exploring photocatalysts to promote the conversion of CO2 valuable chemical fuels is a highly promising approach for mitigating energy scarcity and environmental pollution. Lead-free perovskite Cs3Bi2Br9 quantum dots (QDs) have attracted considerable attention in photoreduction due robust reduction capability controllable product selectivity. Nevertheless, their potential has been impeded by rapid recombination charge carriers, leading unsatisfactory photocatalytic efficiency. Here, unique SnO2/Cs3Bi2Br9 S-scheme heterojunctions are constructed electrostatically self-assembling SnO2 nanofibers with QDs enhance performance. Density functional theory calculations, along experimental studies, reveal that electrons transfer from SnO2, creating directed interfacial electric field bending bands at interfaces. This facilitates transport photoelectrons Cs3Bi2Br9, forming enabling effective separation powerful photoexcited electron/hole pairs. Additionally, profiting enhanced light absorption contributed narrow-bandgap lower barrier CH4 production over surface, heterostructures unveil superior activities high selectivity 70%, without assistance any molecular catalyst or scavenger.

Language: Английский

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The long-distance charge transfer process in ferrocene-based MOFs with FeO6 clusters boosts photocatalytic CO2 chemical fixation

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 337, P. 122909 - 122909

Published: June 8, 2023

Language: Английский

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Vanadium- and manganese-based metal-organic frameworks for potential environmental and catalysis applications

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 522, P. 216231 - 216231

Published: Sept. 25, 2024

Language: Английский

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Boosting Artificial Photosynthesis: CO₂ Chemisorption and S-Scheme Charge Separation via Anchoring Inorganic QDs on COFs

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(3), P. 1951 - 1961

Published: Jan. 22, 2024

Photocatalytic conversion of CO2 into valuable hydrocarbon fuels holds great promise in addressing emerging energy shortages and environmental crises while fulfilling pressing societal national development demands. Nonetheless, its efficiency is hindered by restricted chemisorption, rapid electron–hole recombination, weak redox capability. Drawing inspiration from the distinctive characteristics Schiff-based covalent organic frameworks (COFs), including substantial specific surface area, unique pore structure, an abundance weakly alkaline nitrogen elements, we employ TPA-COF to enhance chemisorption activation acidic molecules, as validated CO2-temperature-programmed desorption analysis. Furthermore, anchoring CsPbBr3 quantum dots (QDs) onto COF facilitates effective spatial separation photoinduced charge carriers with strong capability, resulting formation S-scheme heterojunctions between QDs substantiated situ irradiation X-ray photoelectron spectroscopy, femtosecond transient absorption density functional theory simulations. As anticipated, optimized COF/QDs heterostructures exhibit remarkable enhancements photoreduction performance absence any molecule cocatalyst or scavenger, yielding CO CH4 at rates 41.2 13.7 μmol g–1, respectively. This work provides insights novel organic/inorganic heterojunction photocatalysts separation, offering potential for sustainable artificial photosynthesis.

Language: Английский

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Strong Interfacial Interaction in Polarized Ferroelectric Heterostructured Nanosheets for Highly Efficient and Selective Photocatalytic CO₂ Reduction

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 19, 2025

Abstract Heterojunctions are sustainable solutions for the photocatalytic CO 2 reduction reaction (CO RR) by regulating charge separation behavior at interface. However, their efficiency and product selectivity severely hindered inflexible weak built‐in electric field electronic structure of two phases. Herein, ferroelectric‐based heterojunctions between polarized bismuth ferrite (BFO(P)) CdS constructed to enhance interfacial interactions catalytic activity. The intrinsic polarization depending on ferroelectric state causes significant electrostatic potential difference energy‐band bending. This helps overcome unsatisfactory redox that differs from classical mechanism, synergy heterostructure facilitates effective transfer photogenerated charges with an extended lifetime (>20 ns) significantly enhanced photovoltage (1002 times BFO). optimized carrier dynamics allow heterojunction achieve a much higher yield compared state‐of‐the‐art photocatalysts, 85.46 23.47 than those pristine BFO, respectively. Moreover, it maintains impressive 100% together excellent repeatability cycling. work not only sheds light how strong inherent polarity promotes performance photocatalysts but also provides new insights designing efficient RR.

Language: Английский

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Adsorption characteristics of tetracycline hydrochloride and oxytetracycline by a MOF-525(Co) metal organic framework

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2023, Volume and Issue: 677, P. 132443 - 132443

Published: Sept. 21, 2023

Language: Английский

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Enhanced photocatalytic CO2 reduction over Z-scheme β-Ga2O3/TiO2 heterojunction composite catalyst: Synthesis, performance, and mechanism

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(4), P. 113135 - 113135

Published: May 28, 2024

Language: Английский

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Confinement of CsPbBr₃ Perovskite Nanocrystals into Extra‐large‐pore Zeolite for Efficient and Stable Photocatalytic Hydrogen Evolution

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(15)

Published: Feb. 7, 2024

Metal halide perovskites (MHPs), renowned for their outstanding optoelectronic properties, hold significant promise as photocatalysts hydrogen evolution reaction (HER). However, the low stability and insufficient exposure of catalytically active sites bulky MHPs seriously impair catalytic efficiency. Herein, we utilized an extra-large-pore zeolite ZEO-1 (JZO) a host to confine stabilize CsPbBr

Language: Английский

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Perovskite Paradigm Shift: A Green Revolution with Lead-Free Alternatives in Photocatalytic CO₂ Reduction

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(4), P. 1932 - 1975

Published: April 4, 2024

Carbon dioxide (CO2), an archetypal greenhouse gas, can be transformed into valuable fuels through photocatalysis, presenting auspicious avenue for combating global climate change and energy crisis. While halide perovskites have sparked substantial research interest, concerns over lead toxicity spurred exploration of their lead-free counterparts CO2 photoreduction. This comprehensive Review navigates the fundamentals reduction, delving basic principles, mechanisms, relevant operando techniques. It then introduces diverse structures (LFHPs), synthesis methodologies, intrinsic properties that render them suitable Subsequently, unfolds application modification strategies light-driven conversion, highlighting breakthroughs shedding light on potential mechanisms. Finally, current challenges to tailor LFHPs robust photocatalytic reduction are critically discussed, offering insights future in this realm. aims illuminate path toward sustainable bridging knowledge gaps inspiring innovations a greener carbon-neutral tomorrow.

Language: Английский

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Ligand-engineered Cu-based halide perovskite for highly efficient near-infrared photocatalytic CO2 reduction

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 352, P. 124048 - 124048

Published: April 21, 2024

Language: Английский

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