Broad Light Absorption and Multichannel Charge Transfer Mediated by Topological Surface State in CdS/ZnS/Bi₂Se₃ Nanotubes for Improved Photocatalytic Hydrogen Production

Advanced Functional Materials, Год журнала: 2024, Номер 34(46)

Опубликована: Июль 1, 2024

Abstract Semiconductor heterojunctions have garnered extensive interest in photocatalytic hydrogen generation, yet the limited light absorption and charge transfer efficiencies still restrict performance. The topological insulator has unique surface states high‐mobility electrons, demonstrating significant potential for enhancing photocatalysis. Herein, a ternary photocatalyst based on insulator, which CdS ZnS nanoparticles are grown Bi 2 Se 3 nanotube, is prepared efficient photocatalysis driven by state first time. Under simulated solar irradiation, CdS/ZnS/Bi nanotubes display robust production rate of 7.13 mmol h −1 g , 69.2 times comparable to many CdS‐based photocatalysts. hollow structure, cooperative bandgap excitations three components endow hybrids with wide response harvest energy. Meanwhile, multichannel facilitated internal electric fields within effectively suppresses recombination photogenerated carriers. This mechanism maintains high concentration stable electrons resulting highly production. work provides new inspiration designing heterojunction photocatalysts insulators high‐efficiency solar‐driven energy conversion.

Язык: Английский

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Advanced carbon nitride‐based single‐atom photocatalysts

SusMat, Год журнала: 2024, Номер 4(5)

Опубликована: Июль 18, 2024

Abstract Single‐atom catalysts (SACs) have rapidly become a hot topic in photocatalytic research due to their unique physical and chemical properties, high activity, selectivity. Among many semiconductor carriers, the special structure of carbon nitride (C 3 N 4 ) perfectly meets substrate requirements for stabilizing SACs; they can also compensate defects C materials by modifying energy bands electronic structures. Therefore, developing advanced ‐based SACs is great significance. In this review, we focus on elucidating efficient preparation strategies burgeoning applications SACs. We outline prospective enhancing performance future. A comprehensive array methodologies presented identifying characterizing This includes an exploration potential atomic catalytic mechanisms through simulation regulation behaviors synergistic effects single or multiple sites. Subsequently, forward‐looking perspective adopted contemplate future prospects challenges associated with encompasses considerations, such as loading, regulatory design, integration machine learning techniques. It anticipated that review will stimulate novel insights into synthesis high‐load durable SACs, thereby providing theoretical groundwork scalable controllable field.

Язык: Английский

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Synergy of Ni single atoms and NiO nanoclusters in carbon nitride to create local charge polarization for enhanced CO2 photoreduction

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160101 - 160101

Опубликована: Фев. 1, 2025

Язык: Английский

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Phosphonic acid-functionalized g-C3N4 nanosheets for chromium (Cr6+) adsorption from aqueous solutions: Experimental insights and density functional theory calculations

Inorganic Chemistry Communications, Год журнала: 2025, Номер unknown, С. 113971 - 113971

Опубликована: Янв. 1, 2025

Язык: Английский

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Atomically dispersed Cu-N3 on hollow spherical carbon nitride for acetaminophen degradation: Generation of 1O2 from H2O2

Separation and Purification Technology, Год журнала: 2023, Номер 318, С. 124016 - 124016

Опубликована: Май 4, 2023

Discharge of recalcitrant pharmaceuticals into aquatic systems has caused severe impacts on public health and ecosystem. Advanced oxidation processes (AOPs) are effective for eliminating these refractory pollutants, which single-atom catalysts (SACs) become the state-of-the-art materials owing to maximized exposure active metal sites. In this work, hollow spherical graphitic carbon nitride (hsCN) was fabricated incorporate copper species develop Fenton-like acetaminophen (ACT) removal. Through pyrolysis supramolecular assemblies derived from melamine-Cu complex cyanuric acid, single atom Cu-N3 sites were anchored hsCN by N-coordination obtain SACu-hsCN. virtue atomically dispersed as well structure providing smooth channels interactions between Cu atoms reactants, optimal 5.5SACu-hsCN removed 94.8% ACT after 180 min reactions, superior that 5.5AGCu-hsCN with aggregated particles (56.7% in min). Moreover, still four cycles regeneration. The mechanism investigation demonstrated both hydroxyl radicals (OH) singlet oxygen (1O2) contributed degradation 5.5SACu-hsCN/H2O2 system, non-radical 1O2 played dominant role.

Язык: Английский

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A novel g-C3N4 photocatalytic pretreatment for reducing silica and modifying the structure of rice straw for sustainable biofuel production

Fuel, Год журнала: 2023, Номер 357, С. 129901 - 129901

Опубликована: Сен. 23, 2023

Язык: Английский

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Exploring the Remarkably High Photocatalytic Efficiency of Ultra-Thin Porous Graphitic Carbon Nitride Nanosheets

Nanomaterials, Год журнала: 2024, Номер 14(1), С. 103 - 103

Опубликована: Янв. 1, 2024

Graphitic carbon nitride (g-C3N4) is a metal-free photocatalyst used for visible-driven hydrogen production, CO2 reduction, and organic pollutant degradation. In addition to the most attractive feature of visible photoactivity, its other benefits include thermal photochemical stability, cost-effectiveness, simple easy-scale-up synthesis. However, performance still limited due low absorption at longer wavelengths in range, high charge recombination. addition, exfoliated nanosheets easily aggregate, causing reduction specific surface area, thus photoactivity. Herein, we propose use ultra-thin porous g-C3N4 overcome these limitations improve photocatalytic performance. Through optimization novel multi-step synthetic protocol, based on an initial treatment, nitric acid (HNO3), ultrasonication step, were able obtain very thin well-tuned material that yielded exceptional photodegradation methyl orange (MO) under light irradiation, without need any co-catalyst. About 96% MO was degraded as short 30 min, achieving normalized apparent reaction rate constant (k) 1.1 × 10−2 min−1mg−1. This represents highest k value ever reported using C3N4-based photocatalysts degradation, our thorough literature search. Ultrasonication not only prevents agglomeration but also tunes pore size distribution plays key role this achievement. We studied their evolution (HER), production 1842 µmol h−1 g−1. profound analysis all samples’ structure, morphology, optical properties, provide physical insight into improved optimized sample both reactions. research may serve guide improving activity two-dimensional (2D) semiconductors irradiation.

Язык: Английский

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Fabrication of Nanoporous 3D Carbon Nitride from Poly(ionic liquid)s for Regiospecific Synthesis of Benzimidazole Frameworks

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(6), С. 6536 - 6546

Опубликована: Март 9, 2024

The traditional form of carbon nitride materials poses limitations, particularly in catalysis, due to a limited number active sites and low surface area. In response these challenges, two porous tubes (CNTs) with diverse properties were designed fabricated by introducing different poly(ionic liquid)s (PILs) as templates. Imidazolium-based PILs synthesized ion pairs, including halogen (Br) chiral amino acid (l-phenylalanine). results indicate that the morphology CNTs are influenced nature PIL pairs. Synthesized CNT, assisted PIL-Br (designated CNT1), demonstrated superior characteristics terms thermal stability (up 640 °C), specific area (73.5 m2/g), recoverability (six runs without significant decrease reaction yield), which key factors high-performance catalyst. following, CNT architectures employed heterogeneous catalysts, their catalytic efficiencies compared regiospecific synthesis benzimidazole ring systems. As expected, CNT1 demonstrates superfast (8–12 min) various pharmaceutical scaffolds excellent yields 95%) under ultrasound irradiation. groundbreaking achievement, this is first report presents preparation superactive catalyst through integration distinct categories advanced materials, ionic polymers graphite nitrides, for multicomponent reactions. This study offers fresh perspective on enhancing activity graphitic changing pairs technological applications.

Язык: Английский

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Enhanced hydrogen production in membrane reactors: A novel approach

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 83, С. 946 - 966

Опубликована: Авг. 14, 2024

Язык: Английский

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Constructing carbon-defect-rich g-C3N4/In2S3 2D vertically stacked Z-scheme heterojunction for ultrafast photocatalytic Cr(VI) reduction

Applied Surface Science, Год журнала: 2025, Номер unknown, С. 162286 - 162286

Опубликована: Янв. 1, 2025

Язык: Английский

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