Tunable Ferroelectric Polarization in BaTiO₃ Coupled with Zn_0.5Cd_0.5S Quantum Dots for Efficient Solar‐Driven Hydrogen Evolution

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 23, 2025

Abstract Integrating ferroelectric materials with semiconductor photocatalysts offers a groundbreaking strategy to enhance solar‐driven hydrogen production by improving charge separation and transfer efficiency. Herein, synergistic system is developed coupling the tunable polarization of BaTiO 3 (BTO) Z‐scheme heterojunction in Zn 0.5 Cd S quantum dots (ZCS QDs). The strong adjustable built‐in electric field generated BTO effectively drives carrier separation, enhances interfacial band bending, mitigates excitonic effects commonly observed QDs, facilitating directional transfer. Mechanistic insights, validated situ X‐ray photoelectron spectroscopy (XPS) Kelvin Probe Force Microscopy (KPFM), highlight pivotal role modulating dynamics interactions. These attributes, resulting from heterojunction, enable ZCS QDs/BTO composite achieve an outstanding evolution rate 0.83 mmol g −1 h , surpassing pure QDs factors 20.8 1.7, respectively. Notably, external further amplifies 1.19 representing remarkable 143% increase compared pristine showcasing polarization‐enhanced fields photocatalysis. This work presents novel pathway for designing advanced photocatalysts, providing promising prospects sustainable production.

Language: Английский

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Inverse opal anatase/rutile TiO2 multi-heterojunctions enable efficient photoelectrochemical water splitting

Chemical Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

In this work, we present a 3D hierarchical inverse opal anatase/rutile TiO 2 multi-heterojunction photoanode material, which exhibits excellent electron–hole separation efficiency for photoelectrochemical water splitting.

Language: Английский

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A Self‐Adaptive Quantum Dots/BaTiO₃ Junction Together with Giant Charge Separation‐Driving Force for CO₂ Photoreduction via Ferroelectric Polarization Engineering

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

Published: March 3, 2025

Abstract Quantum dots (QDs) with multiple exciton generation are identified as one of the most competitive candidates for highly efficient solar‐to‐chemical energy conversion, yet not well recognized in excellent CO 2 photoreduction activity due to agglomeration and effect. Here, taking Zn 0.5 Cd S QDs (ZCS QDs) an example, ferroelectric BaTiO 3 (BTO) high‐energy state polarization charges is introduced dynamically tune properties interfacial charges, achieving self‐adaptive electrostatic adsorption intensive photogenerated charge separation. Meanwhile, synergy Z‐scheme ZCS QDs/BTO heterojunction, carrier recombination further inhibited. Such a subtle modulation exhibits exceptional improvement photoreduction, reaching yields that 15.06 times 2.13 those pure BTO QDs, respectively. Notably, there remarkable 8.67 increase yield external polarization. The validity modulating strategy boosting demonstrated using double‐layer capacitance ( C dl ) situ Fourier transform infrared spectroscopy. This study shows great promise materials photoreduction.

Language: Английский

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Reinforced Hole Trapping in S‐Scheme Photoharvesters for Markedly Enhanced Photocatalytic Hydrogen Evolution and Nitrogen Fixation

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 7, 2025

Abstract The S‐scheme heterojunction exerts a profoundly positive influence on enhancing carrier separation efficiency and redox capability. However, there are few reports accelerating the reaction rate of photogenerated charge carriers, particularly consumption holes in heterojunction. Herein, an situ construction strategy is employed to construct ultra‐small nonprecious metal NiO (≈2 nm) By incorporating into heterojunctions, photocatalytic hydrogen production performance significantly improved by 380 times, nitrogen fixation enhanced 20 times. Density function theoretical (DFT) calculations, X‐ray photoelectron spectroscopy (in XPS), Diffuse Reflectance Infrared Fourier Transform Spectroscopy DRIFTS) characterization results indicate that incorporation heterojunctions can not only enhance photo‐generated carriers ability but also further promote sacrificial agents, thereby achieving secondary enhancement efficiency. Therefore, (H 2 ) (N markedly improved. successful execution this work provides novel approach material structure design, offering valuable insights for development improvement high‐performance materials.

Language: Английский

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The Lattice Defects of Nanofilm Introduced by N Doping Promotes Radical Oxygen Species Production for Rapid Photocatalytic Elimination of Contact Infection

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 23, 2025

Abstract Contact infection is accelerating the spread of pathogenic bacteria, threatening health people all over world. Herein, photoresponsive TiO 2 /N‐doped ZnO (TiO /N‐ZnO) nanofilms are synthesized using atomic layer deposition and sol–gel method to rapidly kill bacteria on electronic touch screens by strengthened photocatalytic sterilization. The enhancement performance /ZnO significantly attributed oxygen vacancy crystal defect induced nitrogen element doping, leading production an increased quantity reactive species from /N‐ZnO. Further, when engage with nanofilm, there occurrence electron transfer between /N‐ZnO bacterial film, thereby consequently disturbing equilibrium film. Upon exposure simulated sunlight for a duration 3 min (for Staphylococcus aureus ; S. ) or 10 Escherichia coli E. ), demonstrates superior antibacterial effects (>95%) both strains. With illumination time extended 20 min, efficacy against reaches up 100%. Concurrently, demonstrate commendable light transmittance (>85%) biocompatibility. As such, this study may offer potential methodology antimicrobial applications in screens.

Language: Английский

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Graphdiyne (CnH2n–2) based copper(I) bromide dual S-Scheme heterojunction with AX2O8 type compounds induced electron directional migration

Catalysis Science & Technology, Journal Year: 2024, Volume and Issue: 14(23), P. 6854 - 6868

Published: Jan. 1, 2024

A fundamental strategy for enhancing the performance of photocatalytic water-splitting catalysts is to facilitate efficient migration photogenerated charge carriers establish a heterojunction.

Language: Английский

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