Molecular modulation of interfaces in a Z-scheme van der Waals heterojunction for highly efficient photocatalytic CO2 reduction

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 663, P. 31 - 42

Published: Feb. 13, 2024

Language: Английский

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Surface oxygen vacancy engineering in weak Bi–O bonded ferroelectric bismuth sodium titanate for boosting the photocatalytic CO₂ reduction reaction

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(16), P. 9661 - 9671

Published: Jan. 1, 2024

A novel ferroelectric photocatalyst modulated by the surface and polarization states is developed to promote CO 2 reduction reaction, lattice distortion elemental coordination environment are elaborated in detail.

Language: Английский

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Harvesting the Vibration Energy of CdS for High‐Efficient Piezo‐Photocatalysis Removal of U(VI): Roles of Shape Dependent and Piezoelectric Polarization

Energy & environment materials, Journal Year: 2024, Volume and Issue: 7(5)

Published: Jan. 22, 2024

Piezo‐photocatalysis could coalesce the advantages of mechanical vibration and solar energy perfectly to achieve high‐efficiency catalytic activity. Herein, quintessential piezoelectric material CdS nanowires with different aspect ratios are precisely constructed applied for piezo‐photocatalytic reduction U(VI) first time. The ultrasonic (60 kHz, 100 W) induces potential generate a 0.57 eV A −1 electric field, which is added direction (010) as driving force efficiently separate photogenerated charges. alliance between effect photocatalytic activity endows NW‐3 fastest rate under 5 W LED irradiation, relevant constant (0.042 min ) about 12 53.8 times than that ultrasonication. More importantly, 93.74% be removed from natural uranium mine wastewater. Therefore, this piezo‐photocatalysis system reduces easily separable (UO 2 )O ·2H O(s) provides valuable input disposal applications radioactive wastewater broadens horizons nuclear utilization toward advancement carbon neutrality.

Language: Английский

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Unveiling the synergistic role of nitrogen vacancies and Z-scheme heterojunction in g-C3N4/β-Bi2O3 hybrids for enhanced CO2 photoreduction

Nano Energy, Journal Year: 2024, Volume and Issue: 124, P. 109494 - 109494

Published: March 13, 2024

Language: Английский

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Piezo‐catalysis in BiFeO₃@In₂Se₃ Heterojunction for High‐Efficiency Uranium Removal

Small, Journal Year: 2024, Volume and Issue: 20(20)

Published: Jan. 25, 2024

Abstract Piezo‐catalysis emerges as an efficient, safe, and affordable strategy for removing hazardous substances from aquatic environments. Here, the BiFeO 3 @In 2 Se heterojunction demonstrates remarkable prowess a piezo‐catalyst, enabling high‐efficiency removal of uranium (U) U(VI)‐containing water. A total U(VI) efficiency 94.6% can be achieved under ultrasonic vibration without any sacrificial agents. During entire catalytic process, piezo‐induced electrons, hydroxyl radicals, superoxide radicals play important roles in removal, while generated H O is responsive to transformation soluble into insoluble (UO )O •2H UO . Furthermore, auxiliary illumination accelerate increase free charges, piezo‐catalyst retain more charges. This leads improved 98.8% significantly increased reaction rate constant. study offers comprehensive analysis fabrication piezo‐catalysts or extraction

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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Oxygen vacancy engineering of zinc oxide for boosting piezo-electrocatalytic hydrogen evolution

Applied Surface Science, Journal Year: 2023, Volume and Issue: 616, P. 156556 - 156556

Published: Jan. 25, 2023

Language: Английский

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Constructing of GQDs/ZnO S-scheme heterojunction as efficient piezocatalyst for environmental remediation and understanding the charge transfer mechanism

Carbon, Journal Year: 2023, Volume and Issue: 218, P. 118772 - 118772

Published: Dec. 27, 2023

Language: Английский

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Pulsed‐Laser‐Triggered Piezoelectric Photocatalytic CO₂ Reduction over Tetragonal BaTiO₃ Nanocubes

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(45)

Published: Aug. 2, 2023

Abstract The recombination of photoinduced carriers in photocatalysts is considered one the biggest barriers to increase photocatalytic efficiency. Piezoelectric open a new route realize rapid carrier separation by mechanically distorting lattice piezoelectric nanocrystals form potential within nanocrystals, generally requiring external force (e.g., ultrasonic radiation, mechanical stirring, and ball milling). In this study, low‐power UV pulsed laser (PL) (3 W, 355 nm) as light source can trigger CO 2 reduction tetragonal BaTiO 3 (BTO‐T) absence an applied force. tremendous transient pressure (5.7 × 10 7 Pa, 2.7 W) nm PL not only bends energy band BTO‐T, thus allowing reactions that cannot theoretically occur take place, but also induces built‐in electric field determine efficient separation. On basis, PL‐triggered realizes highest reported performance, reaching millimole level yield 52.9 mmol g −1 h achieving continuous catalytic system. method study promising contribute design reactions.

Language: Английский

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Integration of Single‐Atom Catalyst with Z‐Scheme Heterojunction for Cascade Charge Transfer Enabling Highly Efficient Piezo‐Photocatalysis

Advanced Science, Journal Year: 2023, Volume and Issue: 10(28)

Published: Aug. 6, 2023

Piezo-assisted photocatalysis (namely, piezo-photocatalysis), which utilizes mechanical energy to modulate spatial and distribution of photogenerated charge carriers, presents a promising strategy for molecule activation reactive oxygen species (ROS) generation toward applications such as environmental remediation. However, similarly photocatalysis, piezo-photocatalysis also suffers from inferior separation utilization efficiency. Herein, Z-scheme heterojunction composed single Ag atoms-anchored polymeric carbon nitride (Ag-PCN) SnO2-x is developed efficient carrier transfer/separation both within the catalyst between surface molecules (O2 ). As revealed by dynamics analysis theoretical simulations, synergy atoms initiates cascade electron transfer Ag-PCN then O2 adsorbed on Ag. With ultrasound irradiation, polarization field generated piezoelectric hybrid further accelerates regulates pathway. result, Ag-PCN/SnO2-x efficiently activates into ·O2- , ·OH, H2 under co-excitation visible light ultrasound, are consequently utilized trigger aerobic degradation refractory antibiotic pollutants. This work provides maneuver integrating single-atom catalysts (SACs) with heterojunction.

Language: Английский

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