Dual-cocatalysts-embedded hollow photocatalysis system drives solar fuel production

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160313 - 160313

Опубликована: Фев. 1, 2025

Язык: Английский

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A Covalent Organic Framework as Photocatalyst for Smart Conversion Between Photooxidation and Photoreduction and H₂O₂ Production in Full pH Environment

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 7, 2025

Abstract Developing multifunctional photocatalysts with intelligent self‐adjusting is of great significance in the photocatalytic process. Herein, a smart covalent organic framework (Por‐HQ‐COF) phenol‐quinone conversion structure pH changes constructed for photooxidation, photoreduction, and H 2 O production. As photocatalyst, Por‐HQ‐COF can convert into Por‐BQ‐COF intelligently trigger including solution pH, vice versa. The reconstruction not only significantly alters morphologies specific surface areas COF, but also leads to an entirely change band energy charge distribution influence photoelectric properties. result, under acidic conditions, converts automatically photoreduce high concentration Cr(VI) Cr(III) efficiently. Under neutral superoxide anions (·O − ) initiate accelerate photooxidation degrade high‐concentration TC. alkaline Por‐BQ‐COF, effectively photosynthesize (1525 µmol h −1 g at λ > 420 nm) absence any sacrificial reagents, reveal strong alkalinity lower barrier hydrogen extraction from clarify active sites This work provides new strategy developing fulfill application across full environment.

Язык: Английский

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Synergistic Mechanism of Hydroxyl Regulation and a Polyvinylpyrrolidone Surfactant in Enhancing the Catalytic Oxidation Abilities of BiOBr

Molecules, Год журнала: 2025, Номер 30(6), С. 1286 - 1286

Опубликована: Март 13, 2025

The rational design of BiOBr photocatalysts with optimized surface properties and enhanced photooxidative capacities is crucial. This study proposes a synergistic strategy combining hydroxyl-rich solvents polyvinylpyrrolidone (PVP) surfactants to modulate the structural electronic through solvothermal approach. resulting self-assembled microspheres demonstrated exceptional efficiency in degrading ciprofloxacin (CIP), methyl orange (MO), rhodamine B (RhB). Among synthesized variants, BiOBr-EG-PVP (fabricated ethylene glycol PVP) exhibited highest photocatalytic activity, achieving near-complete removal 20 mg/L CIP RhB within 10 min under visible light irradiation, degradation rates 60.12–101.73 times higher than pristine BiOBr. characterization revealed that (EG) not only induced formation but also introduced abundant hydroxyl groups, which simultaneously hole-mediated oxidation capabilities. incorporation PVP further promoted development hierarchical honeycomb-like synergistically both group density potential interfacial engineering. Density functional theory (DFT) calculations confirmed performance originated from an increased oxygen content. work elucidates effects surfactant modification fabrication advanced BiOBr-based photocatalysts, providing new insights for high-performance photocatalysis environmental remediation.

Язык: Английский

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A Multifunctional Tb(III)-Based Metal–Organic Framework for Chemical Conversion of CO₂, Fluorescence Sensing of Trace Water and Metamitron

Inorganic Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Дек. 6, 2024

The utilization of metal-organic frameworks (MOFs) as fluorescent sensors for the detection environmental and chemical reagent pollutants well heterogeneous catalysis CO

Язык: Английский

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Multi-enzyme reaction inspired cascade photocatalysis for solar-driven CO2 reduction to ethane

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Дек. 24, 2024

Solar-driven photocatalytic CO₂ conversion into value-added chemicals and fuels is an emerging solution to the challenges of traditional energy environmental/climate concerns. However, synthesis two-carbon (C₂) compounds quite challenging due high activation barrier C-C coupling reaction low content intermediates. Herein, inspired by tandem in multi-enzyme reactions, Cu-N₄ Mo-N₄ active sites have been designed integrated CuPor-POP-Mo as cascade dual metal for efficient reduction ethane (C₂H₆) first time. Significantly, excel-lent C₂H₆ production rate 472.5 µmol g^{− 1} h^{− a product selectivity 87.5% (electron ~ 97.5%) achieved, which are record values using porous polymer catalysts. In-situ spectral characterizations DFT calculations indicate that unlike electrocatalytic C₂ products reported previously, Cu site mainly catalyzes *CO production, Mo triggers between intermediates, thus synergistically boost photoreduction C₂H₆. Our work provides new insights rational design photocatalysts effective C₂₊ from CO₂.}

Язык: Английский

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