Radiation-synthesis of covalent bonding heterojunctions for selective solar-driven CO2 reduction

Materials Today, Год журнала: 2025, Номер unknown

Опубликована: Фев. 1, 2025

Язык: Английский

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Unlocking the Charge‐Migration Mechanism in S‐Scheme Junction for Photoreduction of Diluted CO₂ with High Selectivity

Advanced Functional Materials, Год журнала: 2023, Номер 34(8)

Опубликована: Ноя. 7, 2023

Abstract The rational design of an S‐scheme heterojunctions in hybrid semiconductors to realize separated charge carriers and sufficient redox ability is considered as attractive way achieve high photocatalytic activity diluted CO 2 reduction (DCR). An heterojunction formed the fibrous Ta O 5 /Ag S nanostructures proposed for improving performance DCR under simulated solar irradiation. Benchmark CH 4 production rates 132.3 µmol g −1 are obtained with 93.1% selectivity over optimal catalyst ASTO‐2. remarkable attributed unique 0D/1D structure effective separation by photoinduced strong internal electric field mechanism. measurements situ X‐ray photoelectron spectroscopy, femtosecond transient absorption electron paramagnetic resonance further confirm carrier transfer pathways following This research can provide a new strategy designing improve conversion.

Язык: Английский

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Amine-Functionalized Metal-Free Nanocarbon to Boost Selective CO₂ Electroreduction to CO in a Flow Cell

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(22), С. 29060 - 29068

Опубликована: Май 20, 2024

Highly efficient electrochemical CO2-to-CO conversion is a promising approach for achieving carbon neutrality. While nonmetallic electrocatalysts have shown potential utilization in H-type cells, flow cells at an industrial scale remains challenging. In this study, we present cost-effective synthesis strategy preparing ultrathin 2D nanosheet catalysts through simple amine functionalization. The optimized catalyst, NCNs-2.5, demonstrates exceptional CO selectivity with maximum Faradaic efficiency of 98% and achieves high current density 55 mA cm-2 cell. Furthermore, the catalyst exhibits excellent long-term stability, operating continuously 50 h while maintaining above 90%. superior catalytic activity NCNs-2.5 attributed to presence amine-N active sites within lattice structure. This work establishes foundation rational design as sustainable alternatives metals energy systems.

Язык: Английский

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Nitrogen-doped carbon dots as photocatalysts for organic synthesis: Effect of nitrogen content on catalytic activity

Nano Research, Год журнала: 2024, Номер 17(6), С. 4825 - 4833

Опубликована: Фев. 8, 2024

Язык: Английский

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The Emerging Star of Carbon Luminescent Materials: Exploring the Mysteries of the Nanolight of Carbon Dots for Optoelectronic Applications

Small, Год журнала: 2024, Номер 20(31)

Опубликована: Март 10, 2024

Carbon dots (CDs), a class of carbon-based nanomaterials with dimensions less than 10 nm, have attracted significant interest since their discovery. They possess numerous excellent properties, such as tunability photoluminescence, environmental friendliness, low cost, and multifunctional applications. Recently, large number reviews emerged that provide overviews synthesis, applications, composite functionalization. The application CDs in the field optoelectronics has also seen unprecedented development due to optical but them this are relatively rare. With idea deepening broadening understanding applications optoelectronics, review for first time provides detailed summary luminescent solar concentrators (LSCs), light-emitting diodes (LEDs), cells, photodetectors. In addition, definition, categories, synthesis methods briefly introduced. It is hoped can bring scholars more deeper optoelectronic further promote practical CDs.

Язык: Английский

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3D-Printed MOF Monoliths: Fabrication Strategies and Environmental Applications

Nano-Micro Letters, Год журнала: 2024, Номер 16(1)

Опубликована: Авг. 15, 2024

Metal-organic frameworks (MOFs) have been extensively considered as one of the most promising types porous and crystalline organic-inorganic materials, thanks to their large specific surface area, high porosity, tailorable structures compositions, diverse functionalities, well-controlled pore/size distribution. However, developed MOFs are in powder forms, which still some technical challenges, including abrasion, dustiness, low packing densities, clogging, mass/heat transfer limitation, environmental pollution, mechanical instability during process, that restrict applicability industrial applications. Therefore, recent years, attention has focused on techniques convert MOF powders into macroscopic materials like beads, membranes, monoliths, gel/sponges, nanofibers overcome these challenges.Three-dimensional (3D) printing technology achieved much interest because it can produce many high-resolution with complex shapes geometries from digital models. this review summarizes combination different 3D strategies MOF-based for fabricating 3D-printed monoliths applications, emphasizing water treatment gas adsorption/separation Herein, various fabrication such direct ink writing, seed-assisted in-situ growth, coordination replication solid precursors, matrix incorporation, selective laser sintering, light processing, described relevant examples. Finally, future directions challenges also presented better plan trajectories shaping improved control over structure, composition, textural properties monoliths.

Язык: Английский

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Synergistic Effects of Amine Functional Groups and Enriched‐Atomic‐Iron Sites in Carbon Dots for Industrial‐Current–Density CO₂ Electroreduction

Small, Год журнала: 2024, Номер 20(32)

Опубликована: Март 21, 2024

Abstract Metal phthalocyanine molecules with Me‐N 4 centers have shown promise in electrocatalytic CO 2 reduction (eCO R) for generation. However, iron (FePc) is an exception, exhibiting negligible eCO R activity due to a higher * COOH conversion barrier and stronger binding energy. Here, amine functional groups onto atomic‐Fe‐rich carbon dots (Af‐Fe‐CDs) are introduced via one‐step solvothermal molecule fusion approach. Af‐Fe‐CDs feature well‐defined Fe‐N active sites impressive Fe loading (up 8.5 wt%). The synergistic effect between electron‐donating yielded outstanding ‐to‐CO performance. At industrial‐relevant current densities exceeding 400 mA cm −2 flow cell, achieved >92% selectivity, surpassing state‐of‐the‐art electrocatalysts. situ electrochemical FTIR characterization combined theoretical calculations elucidated that integration significantly reduced energy barriers intermediate formation desorption, enhancing efficiency. proposed offers promising avenue high‐efficiency catalysts elevated atomic‐metal loadings.

Язык: Английский

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Atomically dispersed Au single sites and nanoengineered structural defects enable a high electrocatalytic activity and durability for hydrogen evolution reaction and overall urea electrolysis

Electrochimica Acta, Год журнала: 2024, Номер 499, С. 144685 - 144685

Опубликована: Сен. 1, 2024

Язык: Английский

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Nitrogen and Sulfur Co-Doped Carbon Dots with Excellent Fluorescent Thermal Stability for Anti-Counterfeiting and Information Encryption

Organic Electronics, Год журнала: 2025, Номер 139, С. 107197 - 107197

Опубликована: Янв. 18, 2025

Язык: Английский

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Carbon quantum dots: Classification-structure-property-application relationship for biomedical and environment remediation

Coordination Chemistry Reviews, Год журнала: 2025, Номер 533, С. 216510 - 216510

Опубликована: Фев. 21, 2025

Язык: Английский

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