Harnessing graphene quantum dots for the selective and sensitive detection of dye contaminants DOI

Yuping Xiong,

Weitao Li, Luoman Zhang

et al.

Diamond and Related Materials, Journal Year: 2024, Volume and Issue: unknown, P. 111914 - 111914

Published: Dec. 1, 2024

Language: Английский

Rapid synthesis of carbon quantum dot-integrated metal–organic framework nanosheets via electron beam irradiation for selective 5-hydroxymethylfurfural electrooxidation DOI Creative Commons

Qianjia Ni,

Mingwan Zhang,

Bijun Tang

et al.

Advanced Powder Materials, Journal Year: 2025, Volume and Issue: unknown, P. 100267 - 100267

Published: Jan. 1, 2025

Language: Английский

Citations

3
Unlocking the potential of green-engineered carbon quantum dots for sustainable packaging biomedical applications and water purification DOI Creative Commons
Yasaman Esmaeili, Farzad Toiserkani, Zeinab Qazanfarzadeh

et al.

Advances in Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown, P. 103414 - 103414

Published: Jan. 1, 2025

Language: Английский

Citations

2
Tailoring Electronic and Morphology Features of Iron‐Doped Ni2P Nanoflowers for Enhanced Ammonia Electrosynthesis in Solid Electrolyte Reactors DOI Open Access
Qi Zhang,

Congcong Ni,

Ning Deng

et al.

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

Published: Feb. 13, 2025

Abstract Electrochemical nitrate (NO 3 − ) reduction to ammonia (NH presents a promising route for both wastewater treatment and generation but still suffers from sluggish catalytic activity, insufficient mass transfer, the reliance on high‐concentration supporting electrolytes. This work reports an innovative efficient electrosynthesis reactor by integrating self‐assembled iron‐doped Ni 2 P (Fe‐Ni P/NF) nanoflower cathode with solid‐electrolyte (SE). The SE design eliminates need electrolytes, providing highly ion‐conducting pathway enabling direct production of NH NO . Through tailoring electronic surface characteristics Fe‐Ni P/NF, this achieves complete reduction, 96.7% selectivity, 81.8% faradaic efficiency concentration 100 m at current density mA −2 Density functional theory (DFT) calculations reveal that phosphating Fe doping synergistically enhance adsorption increase availability active hydrogen, thus favoring low energy barrier 0.695 eV. Additionally, superhydrophilicity P/NF catalyst promotes transfer facilitating electrolyte access ensuring rapid gas bubble release. study provides sustainable scalable method converting ‐laden into valuable products.

Language: Английский

Citations

2
Fluorescence Quenching of Graphene Quantum Dots from Orange Peel for Methyl Orange Detection DOI Creative Commons
Weitao Li, Yang Liu,

Xinglong Pang

et al.

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(5), P. 376 - 376

Published: Feb. 28, 2025

Methyl orange (MO) is an organic synthetic dye widely used in laboratory and industrial applications. In settings, it serves as acid-base indicator due to its distinct color change both acidic alkaline environments. Industrially, primarily utilized the textile industry for ultraviolet (UV) absorption properties. However, discharge leakage of methyl into environment can cause severe ecological damage pose potential carcinogenic teratogenic risks human health. Therefore, detecting quantifying concentration various matrices crucial. This study reports synthesis graphene quantum dots (GQDs) from peel a precursor, using ethanol dimethylformamide (DMF) solvents. Cyan (c-GQDs) yellow (y-GQDs) were synthesized through bottom-up hydrothermal method. The difference attributed redshift caused by varying ratio pyridine nitrogen pyrrole nitrogen. These GQDs exhibited notable optical properties, with c-GQDs emitting cyan fluorescence y-GQDs under UV light. To investigate quenching effects, nine commonly dyes tested, all found quench y-GQDs, having most significant effect. peel-derived presence poor dispersion DMF solution. Additionally, possess high specific surface area, abundant functional groups, excellent electronic conductivity, which contribute their effective performance. average thickness (the vertical dimension substrate upwards) was 3.51 nm, confirming graphene-like structure. They emitted within wavelength range 450-530 nm. Notably, linear correlation between intensity (regression coefficient = 0.9954), indicating sensing materials pollutant detection.

Language: Английский

Citations

2
Optimized Sensitivity in Copper(II) Ion Detection: Sustainable Fabrication of Fluorescence Red-Shifted Graphene Quantum Dots via Electron-Withdrawing Modulation DOI Creative Commons
Weitao Li, Qian Niu,

Xinglong Pang

et al.

Molecules, Journal Year: 2025, Volume and Issue: 30(6), P. 1244 - 1244

Published: March 10, 2025

Graphene quantum dots (GQDs) represent a class of promising nanomaterials characterized by adjustable optical properties, making them well suited for applications in biosensing and chemical detection. However, challenges persist achieving scalable, cost-effective synthesis enhancing detection sensitivity. In this study, we have developed simple environmentally friendly method to prepare blue graphene dots, c-GQDs, using nitronaphthalene as precursor, yellow y-GQDs, doped acid. The yield is 29.75%, the average thickness 2.08 nm 3.95 nm, respectively. synthesized c-GQDs exhibit prominent cyan fluorescence at wavelength 490 under excitation 380 while y-GQDs show distinct 540 494 nm. introduction p-aminobenzoic acid (PABA) introduced marked red shift fluorescence, attributed electron-withdrawing effect carboxyl groups on PABA. This key finding significantly enhanced sensitivity GQDs detecting trace copper(II) ions (Cu2+), heavy metal contaminant posing serious environmental risks. was selectively quenched presence Cu2+, facilitating accurate sensitive even complex ion matrices. Mechanistic studies revealed that quenching driven strong static interactions, which inhibit non-radiative transitions. work not only introduces scalable producing high-performance but also highlights their potential effective fluorescent probes monitoring

Language: Английский

Citations

1
Recent advances in amino-functionalized metal–organic frameworks for sustainable photocatalytic carbon dioxide reduction DOI
Yaning Liu, Huazhang Guo, Zhonghua Sun

et al.

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 360, P. 131023 - 131023

Published: Dec. 13, 2024

Language: Английский

Citations

5
Synthesis of Oxygen‐Rich Edge Functionalized MoS2 and WS2 Quantum Dots for Cell Imaging DOI Open Access
Parimal Routh

ChemistrySelect, Journal Year: 2025, Volume and Issue: 10(6)

Published: Feb. 1, 2025

Abstract In the recent years, inexpensive and high‐yield production of metal dichalcogenides quantum dots (QDs) are essential for practical applications. A versatile eco‐friendly ball milling method has been developed synthesis water‐soluble mono layers with oxygen‐rich edge functionalized MoS 2 WS QDs. The resultant QDs have a wide range solubility in various polar solvents. Our effortless leads to very strongly greenish‐blue luminescent This technique can create suitable band gap, i.e., 2.28 eV 2.83 from commercially available multilayer bulk precursors. Both exhibited two transition energy points. fluorescence spectrum showed emissions due polydisperse nature water soluble photoluminescence active were used cell imaging purposes.

Language: Английский

Citations

0
Carbon aerogel and xerogel composites with polypyrrole as electrocatalysts for oxygen reduction reaction DOI Creative Commons
Dušan Mladenović, Meryem Samancı, Diogo M.F. Santos

et al.

Surfaces and Interfaces, Journal Year: 2025, Volume and Issue: 60, P. 106071 - 106071

Published: Feb. 24, 2025

Language: Английский

Citations

0
Engineering CQDs/Bi2WO6 heterostructure for efficient photocatalytic CO2 reduction and degradation dye via S-scheme charge transfer DOI

Lili Ai,

Xinyi Zhang, Chuan Seng Tan

et al.

Journal of Molecular Liquids, Journal Year: 2025, Volume and Issue: unknown, P. 127233 - 127233

Published: Feb. 1, 2025

Language: Английский

Citations

0
Regulation of particle size and surface state to realize multicolor solid carbon dots for white light emitting diodes DOI
Zeyu Wang, Qing Yao, Jindou Shi

et al.

Materials Today Chemistry, Journal Year: 2025, Volume and Issue: 44, P. 102608 - 102608

Published: Feb. 27, 2025

Language: Английский

Citations

0