Unraveling the Plasmonic Effect of Au in Promoting Photocatalytic H₂ Generation and Organic Synthesis

ACS Sustainable Chemistry & Engineering, Год журнала: 2024, Номер 12(46), С. 17026 - 17034

Опубликована: Ноя. 7, 2024

Incorporating plasmonic nanostructures into photocatalysts significantly enhances catalytic efficiency due to effects. In this study, we successfully developed a heterojunction between organic semiconductor zinc porphyrin (Zn-TCPP) and colloidal gold (Au) nanoparticles connected via Au–O bonds. The formation of bonds Zn-TCPP Au facilitates charge transfer by reducing the Schottky barrier at interface. Finite-difference time-domain simulations, in situ XPS measurements, infrared thermal imaging confirm that strong localized surface plasmon resonance effect local electric field photothermal effect, promoting separation electron–hole pairs Zn-TCPP/Au sample improving reaction kinetics. optimal Zn-TCPP/Au-2% composite demonstrates an impressive H2 generation rate 1610 μmol·g–1·h–1, which is 2.7 8.6 times greater than TCPP samples, respectively. Additionally, shows high C–N coupling benzylamine imine, achieving yield 45.1 mmol·g–1 24 h. This study provides comprehensive understanding how activity photocatalysts.

Язык: Английский

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Trifunctional Nature of Heteroatom (B, N, S, O)‐Doped Waste Diesel Soot: Turning Pollutants Into Potential Energy Catalysts for HER, OER, and ORR

Carbon Neutralization, Год журнала: 2025, Номер 4(2)

Опубликована: Фев. 12, 2025

ABSTRACT This study delves into the innovative use of multiheteroatom‐doped vehicle exhaust soot as a catalyst for oxygen reduction reactions (ORR) and hydrogen/oxygen evolution (OER/HER), presenting transformative approach in energy materials. The synergistic effects boron, nitrogen, oxygen, sulfur (B, N, O, S) heteroatom doping on carbon nanoparticles (CNPs) were explored thoroughly experimentally through density functional theory (DFT) modeling, revealing potential these materials tri‐purpose catalysts converting pollutants electrocatalysts. B‐CNPs had lowest overpotential (338 mV) at current 10 mA/cm 2 , whereas reaction kinetics B–N–S‐CNPs superior, they Tafel slope (83.09 mV/dec). Furthermore, all heteroatom‐doped CNPs perform better terms OER than pristine CNPs, are range 1.05–1.15 V (values deducted from theoretical 1.23 vs. RHE) . In ORR, highest limiting density, onset potential, half‐wave overpotential, which 1.70 0.86, 0.64 V, respectively. addition to experimental investigations, DFT simulations used calculate binding (BE), interaction (IE/ E ads ), HOMO‐LUMO band gap, charge transfer (CT), noncovalent (NCI) plot, QTAIM molecular graphs provided evocative outcomes expected. multifaceted integrates analyses, contributing comprehensive understanding catalytic soot.

Язык: Английский

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Microwave-Assisted Synthesis of Pd/g-C3N4 for Enhanced Photocatalytic Degradation of Sulfamethoxazole

Inorganics, Год журнала: 2025, Номер 13(4), С. 118 - 118

Опубликована: Апрель 8, 2025

Sulfamethoxazole (SMX) is a widely used antibiotic for bacterial infections and frequently found in surface waters wastewater treatment plant effluents, where it commonly co-administered with trimethoprim. Because of its emerging ecological health risks, the development effective elimination strategies urgently required. In this study, rapid microwave-assisted technique was employed to synthesize Pd/g-C3N4 photocatalyst SMX aqueous solution. The structure optical properties all samples were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), photoluminescence (PL), UV–visible diffuse reflectance spectroscopy. photocatalytic performance systematically evaluated under visible-light irradiation. results demonstrated that achieved 97% removal efficiency, significantly outperforming pure g-C3N4, which reached only 57% removal. degradation rate constant calculated be 0.0139 min−1, approximately 6.6 times higher than bare g-C3N4. This enhanced attributed incorporation Pd nanoparticles, effectively suppressed recombination photogenerated electron–hole pairs promoted charge separation. influence key operational parameters, including pH, concentration, catalyst dose, examined. Furthermore, mechanism explored elucidate pathways.

Язык: Английский

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Polymer Nanospheres Prepared by Metal Nanoparticles Initiation: Prospects for Application in Enhanced Oil Recovery

Journal of Applied Polymer Science, Год журнала: 2025, Номер unknown

Опубликована: Апрель 15, 2025

ABSTRACT Recent developments in enhanced oil recovery (EOR) have identified polyacrylamide (PAAm) nanospheres as a promising material for reservoir applications. The incorporation of copper nanoparticles (Cu NPs) into these is anticipated to substantially enhance EOR performance. In this work, Cu NPs were employed an alternative conventional initiators the synthesis NPs/PAAm nanospheres. formation mechanism was investigated, and their performance evaluated. Experimental results revealed that can be effectively nanospheres, achieving average utilization efficiency over 85%. exhibited particle size approximately 20 nm, significantly smaller than redox PAAm (> 35 nm). This reduction improved droplet removal rate. During microchannel displacement experiments, outperformed maintaining exceeding 80% under injection conditions. work provides valuable insights advancing technology.

Язык: Английский

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Emerging Photocatalytic Applications of Transition Metal Dichalcogenides and Hybrid Composites for Energy Applications and Environmental Remediation

ChemCatChem, Год журнала: 2025, Номер unknown

Опубликована: Май 24, 2025

Abstract This review provides a critical evaluation of the photocatalytic processes that control efficiency transition metal dichalcogenides (TMDCs) and their hybrid composites in notable applications, including pollutant abatement, hydrogen evolution reaction (HER), oxygen (OER), carbon dioxide (CO₂) reduction. TMDCs possess excellent physicochemical characteristics with tuneable bandgaps, large surface area, intense visible‐light absorption render them exceptionally competent for initiating photo‐induced redox reactions. The highlights mechanistic understanding concerning charge carrier generation separation, defect engineering, interfacial electron transfer, all which is key to improved performance. Particular focus on degradation mechanisms, water splitting kinetics, CO₂ photoreduction mechanisms. Though promising, face challenges such as photo‐corrosion, short‐term stability issues, scale‐up limitations. To overcome these challenges, formation heterojunctions visible‐light‐active semiconductors, halide perovskites, emphasized potential method enhance separation broaden spectral response. Furthermore, integration cocatalysts design multicomponent heterostructures are investigated methods promote durability efficiency. emphasizes central role developing scalable sustainable systems environmental energy applications.

Язык: Английский

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Unveiling Formation Pathways of Ternary I–III–VI CuInS₂ Quantum Dots and Their Effect on Photoelectrochemical Hydrogen Generation

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Май 28, 2025

Abstract Understanding the formation mechanisms of semiconductor nanocrystal quantum dots (QDs) is essential for fine‐tuning their optical and electrical properties. Despite potential in solar energy conversion, synthesis processes resulting properties ternary I–III–VI QDs remain underexplored due to complex interplay among constituent elements. Herein, mechanism CuInS 2 investigated, a direct correlation between pathways photoelectrochemical hydrogen generation performance established. Two distinct governed by Lewis acid strength precursors are revealed. Precursors with weaker strength, such as indium acetate–alkylamine complexes, induce nucleation Cu x S phases, which subsequently transform into QDs. Conversely, exemplified iodide–alkylamine stronger enable simultaneous incorporation all elements during nucleation, Notably, synthesized through this pathway exhibit significantly improved lower electron trap densities, outstanding production an excellent photocurrent density 11.3 mA cm −2 at 0.6 V RHE when used sensitizers photoanodes. These findings highlight critical role tailoring

Язык: Английский

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Synthesis of metal nanoparticles and their role in degradation of pesticides/herbicides: a review

Deleted Journal, Год журнала: 2025, Номер 7(6)

Опубликована: Май 28, 2025

Язык: Английский

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Surface plasmon resonance and structure defects synergetic effect of ZnCdS2/NiMoO4@Cu Z-scheme heterojunction for enhanced photocatalytic CO2 reduction to CH4

Inorganic Chemistry Frontiers, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 18, 2024

ZnCdS 2 /NiMoO 4 @Cu Z-scheme heterojunctions exhibit outstanding activity and nearly 100% selectivity for photocatalytic CO reduction to CH under the combined effects of surface defects, heterojunction photothermal properties.

Язык: Английский

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