Construction of metal-free dual S-scheme heterojunction photocatalysts by rational band alignment for efficient hydrogen evolution

Fuel, Год журнала: 2024, Номер 373, С. 132392 - 132392

Опубликована: Июль 2, 2024

Язык: Английский

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Metallic TiN Nanoparticle Cocatalyst with Hydrogen-Induced Nitrogen Vacancies for Plasmon-Enhanced Full Solar-Spectrum-Driven H₂ Production

ACS Applied Nano Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 11, 2025

Solar-driven hydrogen (H2) production from water-splitting reactions has aroused intensive attention but is still challenging. Here, we report a (H2)-induced nitrogen-defective metallic titanium nitride (TiN) cocatalyst-decorated zinc indium sulfide (ZnIn2S4) nanoflower sphere for enhanced full solar-spectrum-driven H2 production. The defective TiN cocatalysts with localized surface plasmon resonance (LSPR) effect obtained by thermal treatment in the atmosphere indicate reduced electrochemical resistance, rich active sites, and features, they were then decorated onto ZnIn2S4 through one-pot solvothermal process. resultant hydrogenated nanoparticle-decorated (TiN/ZnIn2S4, TZ) composite reveals an extended light absorption range, resisted photocorrosion, accelerated charge separation, demonstrating highest yield rate of 2.4 mmol·g–1·h–1 irradiated visible (λ ≥ 420 nm). Meaningfully, optimal TZ-150 could even produce H2, excited NIR (1050 nm), realizing solar-spectrum-induced This work would offer interesting avenue to employ transition metal nitrides solar-spectrum photocatalytic reactions.

Язык: Английский

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Short-Side-Chain Membranes with Stabilized Superacid on Graphitic Carbon Nitride for Polymer Electrolyte Fuel Cells under Low-Humidity Conditions

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Фев. 17, 2025

The integration of superacid-like heteropolyacids offers a promising route to develop highly proton-conducting membranes for energy storage and conversion. However, the inherent hydrophilicity these acids can cause leaching, which undermines fuel cell performance. In our research, we engineered proton-conductive membrane with facile hydrothermal synthesis approach form stabilized hybrid superacids, namely, phosphotungstic acid (PTA), graphitic carbon nitride (PCN) its incorporation in short-side-chain ionomer, Aquivion. This unique via PCN nanohybrids enhances proton transport within membrane. These effectively combined strong acidity PTA continuous 2D proton-transport pathways short side chain, resulting notable conductivity 0.228 S cm–1 at 80 °C under 95% relative humidity. real impact was evident performance cells using Aquivion/PCN nanocomposite membrane, demonstrated significant improvement 34% peak power density (1.0 W cm–2), 44% (0.98 A cm–2) retained low relatively humidity (30% RH) 0.6 V. advancement represents major leap conversion technologies low-humidity conditions.

Язык: Английский

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Two-Dimensional S-Scheme Engineering in Bi₂WO₆/S_V-ZnIn₂S₄ for Solar-Driven H₂O₂ Generation in Pure Water

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Апрель 24, 2025

The development of eco-friendly hydrogen peroxide (H2O2) synthesis through the photocatalytic oxygen reduction reaction holds significant potential for sustainable chemical engineering; however, it remains hindered by necessity sacrificial agents. Herein, we construct a two-dimensional (2D) S-scheme heterojunction interfacial coupling S-vacancy-rich ZnIn2S4 (SV-ZIS) with Bi2WO6 (BWO) nanosheets via an in situ growth method. Band alignment engineering establishes giant built-in electric field at Bi2WO6/SV-ZIS interface, which drives directional charge transfer, leaving photogenerated electrons and holes highest redox potentials accumulated on BWO SV-ZIS, respectively, O2 H2O oxidation. This spatial separation mechanism enhances both electron-hole pair dissociation efficiency (validated transient photocurrent analysis) preserves strong (reflected free-radical capturing experiments). 2D/2D architecture further amplifies migration atomic-level contact, leading to efficient H2O2 production rate 822 μmol L-1 h-1 pure water. work provides strategy designing high-performance photocatalysts toward under environmentally benign conditions.

Язык: Английский

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Surfactant-Assisted Assembly of Hierarchical CdS-Ti₃C₂T_x MXene toward Enhanced Cooperative Photoredox Catalysis

ACS Materials Letters, Год журнала: 2024, Номер 7(1), С. 257 - 264

Опубликована: Дек. 16, 2024

The scarcity of strategies to finely modulate the interface assembly between MXene and semiconductors often restricts their full potential for photocatalysis. Herein, resorting cetyltrimethylammonium bromide (CTAB) surfactant intercalation effect, we report rational synthesis hierarchical seaurchin-like CdS-Ti3C2Tx MXene-CTAB (CdS-T-C) ensembles structure MXene-semiconductor heterojunctions significantly boosted photoredox coupling catalysis. ternary CdS-T-C exhibits markedly enhanced activity toward visible light photoreforming benzyl alcohol (BA) benzaldehyde (BAD) H2 cooperatively, as compared bare CdS conventional (CdS-T) that suffer from serious restacking with obvious electronic optical property attenuation. Mechanistic studies reveal CTAB interfacial alleviates Ti3C2Tx, thus weakening shielding effect while promoting charge transport surface MXene. This work demonstrates an appealing strategy regulate cross-coupling configuration composites efficient solar-to-chemical conversion.

Язык: Английский

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