D–A Conjugated Polymer/CdS S‐Scheme Heterojunction with Enhanced Interfacial Charge Transfer for Efficient Photocatalytic Hydrogen Generation

Small, Journal Year: 2024, Volume and Issue: 20(31)

Published: March 5, 2024

Abstract Owing to the improved charge separation and maximized redox capability of system, Step‐scheme (S‐scheme) heterojunctions have garnered significant research attention for efficient photocatalysis H 2 evolution. In this work, an innovative linear donor–acceptor (D–A) conjugated polymer fluorene‐alt‐(benzo‐thiophene‐dione) (PFBTD) is coupled with CdS nanosheets, forming organic–inorganic S‐scheme heterojunction. The CdS/PFBTD (CP) composite exhibits impressed hydrogen production rate 7.62 mmol g −1 h without any co‐catalysts, which ≈14 times higher than pristine CdS. It revealed that outstanding photocatalytic performance attributed formation rapid electron transfer channels through interfacial Cd─O bonding as evidenced by density functional theory (DFT) calculations in situ X‐ray photoelectron spectroscopy (XPS) analysis. mechanism involved further investigated photo‐irradiated Kelvin probe force microscopy (KPFM) This work provides a new point view on points out direction designing superior heterojunction photocatalysts.

Language: Английский

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Elucidating the construction and modulation of built-in electric field in the oxygen evolution reaction

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 492, P. 152241 - 152241

Published: May 14, 2024

Language: Английский

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0D/3D heterostructure of perovskite Cs2CuBr4 quantum dots/Bi2O3 microflower as a step-scheme photocatalyst for enhanced CO2 reduction

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 338, P. 126544 - 126544

Published: Jan. 29, 2024

Language: Английский

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An Electron Transfer Mediated Mechanism for Efficient Photoreforming of Waste Plastics Using a Ni₃S₄/ZnCdS Heterojunction

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

Published: Feb. 24, 2025

Abstract The oxidative degradation of plastics in conjunction with the production clean hydrogen (H 2 ) represents a significant challenge. Herein, Ni 3 S 4 /ZnCdS heterojunction is rationally synthesized and employed for efficient H high‐selectivity value‐added chemicals from waste plastic. By integrating spectroscopic analysis techniques density functional theory (DFT) calculations, solely electron transfer‐mediated reaction mechanism confirmed, wherein extracts electrons ZnCdS (ZCS) to promote spatial segregation photogenerated holes, which not only facilitates but also maintains high oxidation potential holes on ZCS surface, favoring hole‐dominated plastic oxidation. Notably, catalyst exhibited rates as 27.9 17.4 mmol g −1 h , along selectivity 94.2% 78.3% liquid product toward pyruvate acetate polylactic acid (PLA) polyethylene terephthalate (PET), respectively. Additionally, carbon yields 26.5% 2.2% are measured after 9 photoreforming, representing highest values reported date. Overall, this research presents promising approach converting into fuel valuable chemical products, offering solution growing issue “ White Pollution ”.

Language: Английский

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Built-in electric fields and extra electric fields in the oxygen evolution reaction

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(29), P. 18047 - 18070

Published: Jan. 1, 2024

OER plays a crucial role in energy storage and conversion, the application of thermal fields is widespread but not systematically discussed. In this work, we have discussion on built-in electric field extra field.

Language: Английский

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CeO₂@Mn Nanozymes for Colorimetric and Fluorescence Detection of Iodide Ions in Urine and Blood

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

The abnormal levels of small molecules, such as iodide ions (I–), in biological systems can be key indicators certain diseases and may pose risks to human health, playing a significant role various physiological processes. Herein, we developed solvothermal method for the synthesis CeO2-based nanozymes (CeO2 NPs, CeO2@Mn CeO2@Se NPs), which serve recognition probes quantitative detection I– urine blood using both colorimetric fluorescence dual methods. NPs showed excellent catalytic activity with aid O-phenylenediamine (OPD) chromogenic substrate; oxidation OPD presence H2O2 produce yellow OPDOX was catalyzed by acting peroxidase enzyme, neutral environment (pH = 6) I–. displayed distinct absorption peaks at 275 nm 450 nm, along maximum emission peak 575 under 380 excitation. Based on these observations, recognition, utilizing detection, developed. limits were found 20 μg/L (3σ/S) mode 0.085 mode. Furthermore, achieved precise blood, offering advantages use resource-limited settings on-site testing. This enhances its potential broader application public health surveillance early disease screening.

Language: Английский

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Enhancing photocatalytic CO₂ reduction via a single-domain ferroelectric Z-scheme heterojunction of BiFeO₃/CsPbBr₃ inducing dual built-in electric fields

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(17), P. 10461 - 10471

Published: Jan. 1, 2024

A Z-scheme heterojunction designed via hot injection method enables growth of nanocrystals on nanosheets. This single-domain design causes a polarization electric field within the nanosheets and an at interface. Both drive charge separation enhancing CO 2 reduction.

Language: Английский

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Site-Specified MOF/COF Heteronanosheets for Enhancing Photocatalytic CO₂ Reduction

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(10), P. 11234 - 11247

Published: May 2, 2024

Metal–organic and covalent–organic framework (MOF COF) semiconductors are promising photocatalytic materials because of their large surface area, ordered pore structure, structural tunability, chemical/thermal stability. However, due to complicated nucleation growth processes, constructing MOF- COF-based heterostructures with controllable morphology, intimate interfacial coupling, site-specified component distribution still remains a great challenge. In this work, MOF/COF heteronanosheets were obtained through seed-mediated synthesis strategy, where the TTCOF (COF formed via Schiff-base reaction between 2,4,6-tris(4-aminophenyl)-1,3,5-triazine 1,3,5-triformylphloroglucinol) anchors preferentially on edge NZZ coordination 2-methylimidazole 5-amino-1H-tetrazole Zn nodes) nanosheets by C–N covalent bonds derived from subsequent imine-to-enamine tautomerization. Intriguingly, Pt PbO2 photodeposition experiments indicate isolation photoreduction photo-oxidation sites basal planes edges NZZ/TTCOF heteronanosheets, respectively, confirming type-II spatial separation charge carriers as clarified band structure analyses density functional theory calculation. Moreover, integration ultraviolet-responsive near-infrared-responsive contributes sufficient utilization incident light irradiation. Additionally, CO2 adsorption contact angle tests reveal preferential H2O site NZZ/TTCOF, respectively. Therefore, without photosensitizer cocatalyst, exhibited markedly promoted gas–solid activity compared pristine TTCOF, it is also superior those many photocatalysts. Our study could propel rational design advanced heteronanostructures for efficient production solar fuels.

Language: Английский

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UV–visible-infrared light driven photothermal synergistic catalytic reduction of CO2 over Cs3Bi2Br9/MoS2 S-scheme photocatalyst

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 680, P. 235 - 245

Published: Nov. 16, 2024

Language: Английский

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Space-restricted proliferation of Bi-based halide perovskite nanocrystals for visible-light-driven selective oxidation of benzyl alcohol

Molecular Catalysis, Journal Year: 2024, Volume and Issue: 556, P. 113932 - 113932

Published: Feb. 16, 2024

Language: Английский

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