Double S-scheme Cu2−xSe/twinned-Cd0.5Zn0.5S homo-heterojunctions with surface plasmon effects for efficient photocatalytic H2 evolution

Journal of Colloid and Interface Science, Год журнала: 2024, Номер 666, С. 481 - 495

Опубликована: Апрель 3, 2024

Язык: Английский

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Polyoxometalates Embedded into Covalent Triazine Frameworks Regulating Charge Transfer for Visible-Light-Driven Synthesis of Functionalized Sulfoxides and Detoxification of Mustard Gas Simulants

ACS Sustainable Chemistry & Engineering, Год журнала: 2024, Номер 12(4), С. 1655 - 1665

Опубликована: Янв. 17, 2024

For environmentally friendly and sustainable development demands, visible-light-driven oxidation of sulfides has become one the most popular strategies to synthesize functionalized sulfoxides degrade mustard gas simulants. Herein, three novel polyoxometalate-based covalent triazine frameworks, SiW12-CTF (1), PW12-CTF (2) PMo12-CTF (3) (CTF = framework), were synthesized via hydrothermal reaction characterized by infrared spectroscopy, powder X-ray diffraction, XPS spectroscopy UV–vis DRS, etc. These compounds are excellent photocatalysts for selective synthesis various as well degradation 2-chloroethyl ethyl sulfide (CEES) illuminated a 10 W 425 nm LED in an O2 atmosphere. Oxygen-rich POMs with strong electronegativity modulate electronic structure create built-in electric field POM-CTFs, which promotes separation migration photogenerated carriers. Meanwhile, encapsulation POM guests into CTF induces different electron transfer behaviors, resulting photocatalytic activities. Specifically, PW12-CTF, visible-light-induced methyl phenyl sulfide, obtain sulfoxide yields 96% 88% within 2 h, respectively, is higher than (68%) SiW12 (5%). However, exhibits inferior properties, yield 35% under same conditions. The in-depth mechanism reveals that process dominated O2•– energy induced 1O2 exist system. In addition, can be used catalyze sulfur-containing maintains boosted structural stability catalytic activity after reaction.

Язык: Английский

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Enhanced solid–gas-phase carbon dioxide photoreduction efficiency through in-situ growth of W18O49 on one-dimensional Nb2O5 nanofibers for forming well-connected S-scheme heterojunction

Fuel, Год журнала: 2025, Номер 386, С. 134287 - 134287

Опубликована: Янв. 10, 2025

Язык: Английский

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Pyrene‐Alkyne‐Based Conjugated Porous Polymers with Skeleton Distortion‐Mediated •O2‐ and 1O2 Generation for High‐Selectivity Organic Photosynthesis

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Май 31, 2024

Abstract Reactive oxygen species (ROS) play a crucial role in determining photocatalytic reaction pathways, intermediate species, and product selectivity. However, research on ROS regulation polymer photocatalysts is still its early stages. Herein, we successfully achieved series of modulations to the skeleton Pyrene‐alkyne‐based (Tetraethynylpyrene (TEPY)) conjugated porous polymers (CPPs) by altering linkers (1,4‐dibromobenzene (BE), 4,4′‐dibromobiphenyl (IP), 3,3′‐dibromobiphenyl (BP)). Experiments combined with theoretical calculations indicate that BE‐TEPY exhibits planar structure minimal exciton binding energy, which favors dissociation followed charge transfer adsorbed O 2 produce ⋅O − . Thus shows optimal activity for phenylboronic acid oxidation [3+2] cycloaddition. Conversely, BP‐TEPY significantly distorted. Its conjugation decreases, intersystem crossing (ISC) efficiency increases, makes it more prone resonance energy generate 1 Therefore, displays best [4+2] cycloaddition thioanisole oxidation. Both above reactant conversion selectivity exceed 99 %. This work systematically reveals intrinsic structure–activity relationship among CPPs, excitonic behavior, selective generation ROS, providing new insights rational design highly efficient CPPs photocatalysts.

Язык: Английский

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Achieve efficient photocatalytic degradation of multiple pollutants by constructing WO3-x/BiOBr heterojunctions with hierarchical structure on carbon fibre cloths

Applied Surface Science, Год журнала: 2024, Номер 671, С. 160670 - 160670

Опубликована: Окт. 1, 2024

Язык: Английский

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Pyrene‐Alkyne‐Based Conjugated Porous Polymers with Skeleton Distortion‐Mediated •O2‐ and 1O2 Generation for High‐Selectivity Organic Photosynthesis

Angewandte Chemie, Год журнала: 2024, Номер unknown

Опубликована: Май 31, 2024

Abstract Reactive oxygen species (ROS) play a crucial role in determining photocatalytic reaction pathways, intermediate species, and product selectivity. However, research on ROS regulation polymer photocatalysts is still its early stages. Herein, we successfully achieved series of modulations to the skeleton Pyrene‐alkyne‐based (Tetraethynylpyrene (TEPY)) conjugated porous polymers (CPPs) by altering linkers (1,4‐dibromobenzene (BE), 4,4′‐dibromobiphenyl (IP), 3,3′‐dibromobiphenyl (BP)). Experiments combined with theoretical calculations indicate that BE‐TEPY exhibits planar structure minimal exciton binding energy, which favors dissociation followed charge transfer adsorbed O 2 produce ⋅O − . Thus shows optimal activity for phenylboronic acid oxidation [3+2] cycloaddition. Conversely, BP‐TEPY significantly distorted. Its conjugation decreases, intersystem crossing (ISC) efficiency increases, makes it more prone resonance energy generate 1 Therefore, displays best [4+2] cycloaddition thioanisole oxidation. Both above reactant conversion selectivity exceed 99 %. This work systematically reveals intrinsic structure–activity relationship among CPPs, excitonic behavior, selective generation ROS, providing new insights rational design highly efficient CPPs photocatalysts.

Язык: Английский

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Enhancing the sensing performance of WO_2.72 toward n-butanol via loading CeO₂ nanoparticles

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(32), С. 21156 - 21164

Опубликована: Янв. 1, 2024

The formation of heterojunctions between CeO 2 and WO 2.72 reduces the band gap. Sample – x wt% shows hydrophobicity due to effective shielding 4f 1 Ce by octet electrons in outer 5s 5p 6 layer.

Язык: Английский

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Engineering defect-rich H-W18O49 nanowire/MIL-125(Ti) nanosheet S-scheme heterostructure for remarkable CO2 photoconversion

Chemical Engineering Journal, Год журнала: 2024, Номер 501, С. 157310 - 157310

Опубликована: Ноя. 13, 2024

Язык: Английский

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Recent Advances in Covalent Organic Frameworks as Photocatalysts for Organic Transformations

Journal of environmental chemical engineering, Год журнала: 2025, Номер unknown, С. 116253 - 116253

Опубликована: Март 1, 2025

Язык: Английский

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CeO2/WO2.72 nanocomposites with S-scheme heterojunctions and oxygen vacancies for enhanced photocatalytic degradation of dichlorvos

Journal of Material Science and Technology, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Язык: Английский

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