Efficient Time‐dependent Dual‐Model Room Temperature Phosphorescent Carbon Quantum Dots/ Boron Nitride Carbide Oxide Matrices

Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 8, 2025

Abstract Room temperature phosphorescence (RTP) materials have broad applications in the field of optical devices due to tunable wavelengths and lifetimes. However, creating efficient RTP that possess multiple properties remains a challenge. Herein, novel approach is developed situ form carbon quantum dots (C‐dots) embedded boron nitride carbide oxide (B‐N‐C‐O) matrices by introducing nitrogen, phosphorus, dopants into C‐dots (P/B/N doped C‐dots), enabling dual emissions time‐dependent afterglow. P/B/N are synthesized vacuum‐assisted gradient heating using ethylenediamine, phosphoric acid, boric acid as precursors with yield 20 g per batch. The introduction provided triplet states, which enable and, long phosphorescent lifetime ranging from 0.98 1.30 s. formation surrounding enables ultrahigh up 50%, surpassing most recently reported C‐dots. To demonstrate potential C‐dots, they used anti‐counterfeiting ink dyes for security codes polyester yarn, showing their suitability high‐level applications. This work provides an effective route large‐scale synthesis highly preparation high‐performance devices.

Language: Английский

---

Large Scale Synthesis of Carbon Dots and Their Applications: A Review

Molecules, Journal Year: 2025, Volume and Issue: 30(4), P. 774 - 774

Published: Feb. 7, 2025

Carbon dots (CDs), a versatile class of fluorescent carbon-based nanomaterials, have attracted widespread attention due to their exceptional optical properties, biocompatibility, and cost-effectiveness. Their applications span biomedicine, optoelectronics, smart food packaging, yet large-scale synthesis remains significant challenge. This review categorizes methods into liquid-phase (hydrothermal/solvothermal, microwave-assisted, magnetic hyperthermia, aldol condensation polymerization), gas-phase (plasma synthesis), solid-phase (pyrolysis, oxidation/carbonization, ball milling), emerging techniques (microfluidic, ultrasonic, molten-salt). Notably, microwave-assisted solid-state show promise for industrial production scalability efficiency. Despite these advances, challenges persist in optimizing reproducibility, reducing energy consumption, developing purification quality control strategies. Addressing issues will be critical transitioning CDs from laboratory research real-world applications.

Language: Английский

---

Bamboo Kraft Pulp Black Liquor as a Renewable Source of Value-Added Carbon Dots

Nanomaterials, Journal Year: 2024, Volume and Issue: 14(23), P. 1887 - 1887

Published: Nov. 23, 2024

China is the country with most abundant bamboo resources in world. Using as a raw material for pulping and papermaking can save lot of wood protect forests. Bamboo enterprises mostly adopt sulfate processes to produce large amount black liquor (BL), which contains monosaccharides, polysaccharides, oligosaccharides, pectin, lignin, etc. The utilization high-value organic matter great economic environmental significance. In this study, blue-green carbon dots (C-dots) were prepared from (

Language: Английский

---

Carboxyl-functionalized multifunctional red-emitting carbon quantum dots as an ideal biomaterial

Biomedical Materials, Journal Year: 2024, Volume and Issue: 20(1), P. 015027 - 015027

Published: Dec. 13, 2024

Abstract Carbon quantum dots (CQDs) have been developed into a popular nanomaterial due to their abundant surface state, good biocompatibility, and excellent antimicrobial properties. However, CQDs with multiple functions, such as being red-emitting, having antibacterial activity, pH sensitivity, rarely reported. In this work, red-emitting (R-CQDs) optical properties activity were prepared by simple green hydrothermal method. applications, the R-CQDs featured generation of reactive oxygen species, indicating photodynamic ability. addition, showed fine giving them potential sensors monitor wounds in real time. The promising application for cell imaging was also demonstrated. summary, we offer sensitivity monitoring wounds, shedding light on biomedical field.

Language: Английский

---

The one-pot fabrication of green-emitting composites based on PMMA

HPU2 Journal of Science Natural Sciences and Technology, Journal Year: 2024, Volume and Issue: 3(3), P. 35 - 42

Published: Dec. 30, 2024

Photoluminescent composites consisting of a photoluminescent material dispersed in suitable matrix have been applied many applications, such as light-emitting diodes, solar concentrators, and anti-counterfeiting inks. The traditional method for the fabrication by blending an as-synthesized is very challenging it difficult to obtain homogeneous composites. In this study, we demonstrated one-step prepare inducing formation in-situ centers stable matrix. Poly(methyl methacrylate) (PMMA) coated with o-phenylenediamine (oPD) was thermally annealed at 165oC duration 5 minutes extruder green-emitting exhibited broad absorption peak 425 nm shoulder 495 nm. emission spectrum composite broad, ranging from 400 700 nm, reached maximum 525 position independent excitation wavelength. resembled near Time-dependent density functional theory (TD-DFT) calculations suggested that 2,3-diaminophenazine 3-amino-2-hydroxyphenazine are main molecular fluorophores accounting optical properties synthetic study transferable preparing numerous thermoplastics.

Language: Английский

---