The construction of p-n heterojunction for enhancing photocatalytic performance in environmental application: A review

Separation and Purification Technology, Год журнала: 2023, Номер 315, С. 123708 - 123708

Опубликована: Март 30, 2023

Язык: Английский

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Highly Strained Bi‐MOF on Bismuth Oxyhalide Support with Tailored Intermediate Adsorption/Desorption Capability for Robust CO₂ Photoreduction

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(40)

Опубликована: Авг. 3, 2022

Herein, using as-designed surface-mounted Bismuth-based metal-organic framework (Bi-MOF) on two-dimensional BiOBr support, as an operable platform for site-specific strain engineering to tailor the intermediate adsorption/desorption capability in CO2 photocatalytic conversion is proposed. Giant compressive up 7.85 % successfully induced Bi-MOF revealed by HRTEM images and geometric phase analysis well situ Raman characterization, which largely downshifts p band center of Bi nodes intensifies their unsaturated state. In-depth explorations are put onto p-p (Bi 6p /CO 2p) orbital hybridization. Taking adsorption process example, 1π 7σ frontier molecule orbitals 2p both strain-free strained models shift downwards Fermi level, indicative fast . Meanwhile, further induces new non-degenerate overlapping near intensified orbitals, stimulating activation absorbed molecules.

Язык: Английский

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The Synergy of Tensile Strain and Ligand Effect in PtBi Nanorings for Boosting Electrocatalytic Alcohol Oxidation

Advanced Functional Materials, Год журнала: 2022, Номер 32(48)

Опубликована: Сен. 23, 2022

Abstract As the best electrocatalysts for alcohol oxidation reactions in direct fuel cells (DAFCs), Pt‐based nanomaterials still face challenges of low utilization efficiency Pt atoms and poor reaction kinetics. To address these issues, a self‐etching strategy is developed to prepare PtBi nanorings (NRs) with abundant low‐coordinated inhomogeneous tensile strain (≈4%). The obtained NRs exhibit superior activity toward methanol (MOR) ethanol (EOR) alkaline media. Particularly, mass activities MOR EOR are 9.4 8.5 times higher than those commercial Pt/C, respectively, which among reported catalysts. highly open structure believed provide plentiful catalytic active sites increase atoms. Theoretical calculations show that two important factors, i.e., adsorption energy key intermediates barrier potential‐determining step, significantly optimized owing synergy ligand effect NRs. This study offers promising rational design preparation efficient catalysts DAFCs.

Язык: Английский

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Dual non-metal atom doping enabled 2D 1T-MoS2 cocatalyst with abundant edge-S active sites for efficient photocatalytic H2 evolution

International Journal of Hydrogen Energy, Год журнала: 2023, Номер 48(45), С. 16987 - 16999

Опубликована: Фев. 3, 2023

Язык: Английский

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Atomically Strained Metal Sites for Highly Efficient and Selective Photooxidation

Nano Letters, Год журнала: 2023, Номер 23(7), С. 2905 - 2914

Опубликована: Март 24, 2023

Strain engineering is an attractive strategy for improving the intrinsic catalytic performance of heterogeneous catalysts. Manipulating strain on short-range atomic scale to local structure sites still challenging. Herein, we successfully achieved modulation ultrathin layered vanadium oxide nanoribbons by ingenious intercalation chemistry method. When trace sodium cations were introduced between V2O5 layers (Na+-V2O5), V-O bonds stretched atomically strained sites, redistributing charges. The Na+-V2O5 demonstrated excellent photooxidation performance, which was approximately 12 and 14 times higher than that pristine VO2, respectively. Complementary spectroscopy analysis theoretical calculations confirmed had a high surficial charge density, activation oxygen molecules contributing photocatalytic property. This work provides new approach rational design strain-equipped catalysts selective reactions.

Язык: Английский

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Modulation of Sulfur Vacancies in ZnIn₂S₄/MXene Schottky Heterojunction Photocatalyst Promotes Hydrogen Evolution

Advanced Functional Materials, Год журнала: 2024, Номер 34(37)

Опубликована: Апрель 15, 2024

Abstract The sustainable production of hydrogen utilizing solar energy is a pivotal strategy for reducing reliance on fossil fuels. ZnIn 2 S 4 (ZIS), as typical metal sulfide semiconductor, has received extensive attention in photocatalysis. Although the introduction sulfur (S) vacancies ZIS to enhance photocatalytic by creating defect levels been explored, detailed studies control and modulation S‐vacancies are sparce. This study demonstrates that while moderate can evolution, excessive may hinder process, underscoring importance S‐vacancy modulation. Guided theoretical calculations, We have designed synthesized with modulated realize favorable adsorption‐free integrated Schottky‐heterojunction MXene co‐catalysts enhanced evolution. optimized evolution performance /MXene (ZMX) reaches 14.82 mmol g −1 h under visible light irradiation, surpassing many reported ‐based photocatalysts. ascribed widened absorption carrier transportation realized co‐catalytic effect. Femtosecond ultrafast (fs‐TA) spectra other in‐situ/ex‐situ characterizations further prove an efficient separation transfer as‐prepared ZMX catalyst. These findings open up new perspectives designing catalysts vacancy

Язык: Английский

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Enhanced photocatalytic performance of Bi2MoO6 via strain engineering through collaborative optimization of indium doping and oxygen vacancies

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 349, С. 123858 - 123858

Опубликована: Апрель 24, 2024

Язык: Английский

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Surface Hydroxyl and Oxygen Vacancies Engineering in ZnSnAl LDH: Synergistic Promotion of Photocatalytic Oxidation of Aromatic VOCs

Environmental Science & Technology, Год журнала: 2024, Номер unknown

Опубликована: Фев. 4, 2024

Photocatalytic oxidation has gained great interest in environmental remediation, but it is still limited by its low efficiency and catalytic deactivation the degradation of aromatic VOCs. In this study, we concurrently regulated surface hydroxyl oxygen vacancies introducing Al into ZnSn layered double hydroxide (LDH). The presence distorted species induced local charge redistribution, leading to remarkable formation vacancies. These subsequently increased amount elongated bond length. synergistic effects greatly enhanced reactant adsorption-activation facilitated transfer generate •OH, •O2–, 1O2, resulting highly efficient ring-opening various Compared with commercial TiO2, optimized ZnSnAl-50 catalyst exhibited about 2-fold activity for toluene styrene 10-fold chlorobenzene degradation. Moreover, demonstrated exceptional stability photocatalytic under a wide humidity range 0–75%. This work marvelously improves efficiency, stability, adaptability through novel strategy engineering.

Язык: Английский

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Sulfur Vacancy‐Rich Bi₂S_3‐X@PDA Heterojunctions with Light‐Controlled Reactive Oxygen Species Generation and Elimination to Combat Biofilm Infection and Inflammation Caused by Drug‐Resistant Bacteria

Advanced Functional Materials, Год журнала: 2024, Номер 34(26)

Опубликована: Фев. 23, 2024

Abstract Antibacterial photocatalytic therapy (APCT) is one of the most promising non‐antibiotic treatment strategies for biofilm‐infected wounds and inflammation caused by drug‐resistant bacteria. However, it still faces issues such as inadequate single antibacterial capacity lack antioxidant capacity. In this study, a Z‐scheme heterojunction (Bi 2 S 3‐X @PDA) designed using polydopamine (PDA) shell firmly anchored to surface sulfur vacancy‐rich bismuth sulfide nanorods NRs). Under near‐infrared light hydrogen peroxide, Bi @PDA significantly improves efficiency reactive oxygen species generation shows nearly 100% broad‐spectrum effect against multiple bacterial strains biofilms in vitro. Interestingly, activity PDA remarkably downregulates expression pro‐inflammatory factors promotes macrophage reprogramming toward proregenerative M2 phenotype. mouse wound model methicillin‐resistant Staphylococcus aureus biofilm infection, effectively eliminates through APCT/mild photothermal therapy, while reducing normal tissues regulating immune microenvironment, thereby promoting rapid healing. Overall, light‐controlled strategy, which provides both anti‐inflammatory functions, reliable tool combating infection

Язык: Английский

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Physical Field Effects to Suppress Polysulfide Shuttling in Lithium–Sulfur Battery

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 14, 2024

Lithium-sulfur batteries (LSB) with high theoretical energy density are plagued by the infamous shuttle effect of lithium polysulfide (LPS) and sluggish sulfur reduction/evolution reaction. Extensive research is conducted on how to suppress effects, including physical structure confinement engineering, chemical adsorption strategy, design redox catalysts. Recently, rational mitigate effects enhance reaction kinetics based field has been widely studied, providing a more fundamental understanding interactions species. Herein, focused their methods mechanisms interaction summarized systematically LPS. Overall, working principle LSB system, origin effect, kinetic trouble in briefly described. Then, mechanism application materials concepts external field-assisted elaborated, electrostatic force, built-in electric field, spin state regulation, strain magnetic photoassisted other strategies pivotally elaborated discussed. Finally, potential directions enhancing performance weakening high-energy anticipated.

Язык: Английский

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