Polypropylene-Derived Luminescent Carbon Dots

ACS Materials Letters, Год журнала: 2024, Номер 6(5), С. 1968 - 1976

Опубликована: Апрель 12, 2024

Polypropylene is one of the most challenging plastics to recycle or upcycle due its excellent chemical and thermal stability. Here, we report an effective two-step synthesis prepare carbon dots (CDs) from polypropylene (PP). In first step, bulk PP converted nanoparticles (PP-NPs) by using a reprecipitation process. second PP-NPs are carbonized hydrothermal treatment. The size, structure, photonic properties PP-CDs vary significantly with treatment temperature. At higher temperature, product ∼2.5 nm in diameter quantum yield 10.3% free unconverted PP. lower temperature (120 °C), large size (∼70 nm) exhibit low (0.2%). This work demonstrates method fully convert shows high degree tunability product.

Язык: Английский

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Comprehensive advances in the synthesis, fluorescence mechanism and multifunctional applications of red-emitting carbon nanomaterials

Nanoscale Advances, Год журнала: 2023, Номер 5(21), С. 5717 - 5765

Опубликована: Янв. 1, 2023

Red emitting fluorescent carbon nanomaterials have drawn significant scientific interest in recent years due to their high quantum yield, water-dispersibility, photostability, biocompatibility, ease of surface functionalization, low cost and eco-friendliness. The red emissive characteristics generally depend on the source, reaction time, synthetic approach/methodology, functional groups, average size, other environments, which directly or indirectly help achieve emission. importance several factors is highlighted this review. Numerous plausible theories been explained detail understand origin fluorescence tunable emission these carbon-based nanostructures. above advantages region make them a potential candidate for multifunctional applications various current fields. Therefore, review focused advances synthesis approach, mechanism fluorescence, electronic optical properties red-emitting nanomaterials. This also explains innovative such as biomedicine, light-emitting devices, sensing, photocatalysis, energy, anticounterfeiting, silk, artificial photosynthesis,

Язык: Английский

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Multicolor Afterglow from Carbon Dots: Preparation and Mechanism

Small Methods, Год журнала: 2023, Номер 8(1)

Опубликована: Окт. 27, 2023

Abstract Carbon dots (CDs), as emerging long afterglow luminescent material, have attracted the attention of researchers and become one hot topics in materials. In recent years, obtained a series CDs‐based materials with different properties utilizing matrix‐assisted self‐protective methods. To meet diverse application needs, development multicolor is focus challenge this field. Most previously reported generally emit blue or green afterglow. Recently, some systems been discovered, emission range can extend from ultraviolet to near‐infrared. However, there lack systematic in‐depth analysis regarding preparation strategy luminescence mechanism Based on this, review summarizes strategies raw reaction parameters. Then, mechanisms are analyzed seven factors, including carbonization degree, surface state, aggregation temperature dependence, excitation multi‐emission center, energy transfer. Moreover, applications introduced. Finally, problems challenges field discussed, future directions analyzed.

Язык: Английский

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Rational design multi-color-emissive chemiluminescent carbon nanodots in a single solvothermal reaction

Nano Research, Год журнала: 2024, Номер 17(6), С. 4651 - 4660

Опубликована: Янв. 30, 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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Efficient Protection of Paper‐Based Cultural Relics via In Situ Synthesis of Carbon Dots/Layered Double Hydroxide

Advanced Functional Materials, Год журнала: 2024, Номер 34(36)

Опубликована: Апрель 1, 2024

Abstract Paper‐based cultural relics are of great value and have been facing irreversible damage caused by multiple factors, among which acid hydrolysis ultraviolet photodegradation the main processes leading to paper deterioration. Paper protection highly relies on a limited range materials with single functions, design new that ensure long‐term safety efficiency simultaneously addressing issues acidification UV degradation in is desired. In this study, introduction carbon dots (CDs)‐enhanced layered double hydroxides (LDH) 0D/2D nanohybrids (CDs/Mg‐Al LDH)  is proposed as novel dual‐functional for against acidification. Through CDs‐assisted situ growth strategy, CDs/Mg‐Al LDH ultrathin thickness (≈9.1 nm) CDs‐intercalated structure achieved. The demonstrate high dispersibility, strong absorption, remarkable photostability, resulting protected‐paper decelerated acidification, oxidation, yellowing under both accelerated UV‐aging dry‐heat conditions. Additionally, can emit uniform blue light 365 nm excitation allows easy identification distributed within paper, marking unique practical feature. This research paces direction paper‐based emerging dots‐based nanomaterials.

Язык: Английский

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Machine learning-assisted carbon dots synthesis and analysis: state of the art and future directions

TrAC Trends in Analytical Chemistry, Год журнала: 2025, Номер unknown, С. 118141 - 118141

Опубликована: Янв. 1, 2025

Язык: Английский

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Hierarchical Assembly of Carbon Dots with Full‐Solar‐Spectrum Absorption for Solar Energy Applications

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Март 17, 2025

Abstract Carbon dots (CDs) featuring low‐cost, non‐toxic, and appealing optical properties demonstrate promising applications in energy, e.g. solar energy capture conversion. However, it remains a significant challenge to expand the absorption bands of CDs from visible near‐infrared (NIR) spectral regions harness entire spectrum sunlight for efficient utilization. Herein, hierarchical assemblies (HA‐CDs) are constructed by stepwise assembling monodispersed ultraviolet‐absorbing water‐soluble visible‐NIR absorbing supra‐CDs (PA‐CDs), then complexing PA‐CDs with Fe 3+ ions form 3D porous architectures full good water resistance. Notably, HA‐CDs exhibit hydrophilicity superior photothermal conversion efficiency 84% under simulated irradiation. The facile ion cross‐linking assembly property enables situ preparation on various fabric substrates, resulting high‐performance products. High‐performance 2D solar‐driven interfacial evaporation, electricity generation, water‐electricity cogeneration have been demonstrated coated (HA‐CDs‐fabric). This study provides novel effective design approach development CD‐based materials applications.

Язык: Английский

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Surface-state controlled synthesis of hydrophobic and hydrophilic carbon dots

Nano Research, Год журнала: 2023, Номер 17(5), С. 4391 - 4399

Опубликована: Дек. 20, 2023

Язык: Английский

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Application of Multicolor Fluorescent Carbon Dots Based on Tea Polyphenols in a White Light-Emitting Diode and Room-Temperature Phosphorescence

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(7), С. 9182 - 9189

Опубликована: Фев. 12, 2024

Carbon dots (CDs) are new carbon nanomaterials, among which those prepared from biomass popular due to their excellent optical properties and environmental friendliness. As representative natural phenolic compounds, tea polyphenols ideal precursors with fluorescent aromatic rings hydroxyl structures. Usually, polyphenolic can only be used produce blue or green CDs, fluorescence in long wavelength domains, such as orange red, cannot achieved. Herein, the high reactivity of groups o-phthalaldehyde was exploited modulate pH during carbonation process, led redshifts wavelengths. Different values reaction caused take different paths form exhibiting conjugated structures, resulting providing colors. Finally, by utilizing situ hydrolysis ethyl orthosilicate, polyphenol-based were embedded into a silica matrix, inducing phosphorescence dots. This study provides approach for preparation application CDs.

Язык: Английский

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