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

Carbon dots-based electrochemical and fluorescent biosensors for the detection of foodborne pathogens: Current advance and challenge DOI

Qiaowen Lei,

Chenghao Liu,

Xinru Nan

et al.

Coordination Chemistry Reviews, Journal Year: 2025, Volume and Issue: 529, P. 216457 - 216457

Published: Jan. 21, 2025

Language: Английский

Citations

5
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
Highly Green Fluorescent Carbon Dots from Gallic Acid: A Turn-On Sensor toward Pb2+ Ions DOI Creative Commons
Hardeep Kaur, Monika Bhattu, Subhendu Chakroborty

et al.

ACS Omega, Journal Year: 2025, Volume and Issue: 10(2), P. 2354 - 2363

Published: Jan. 8, 2025

Carbon dots (CDs) are emerging novel fluorescent sensing nanomaterials owing to their tunable optical properties, biocompatibility, and eco-friendliness. Herein, we report a facile one-pot hydrothermal route for the synthesis of highly green CDs using gallic acid (GA) as single carbon source in N,N-dimethylformamide (DMF) solvent, which serves nitrogen reaction medium. The properties synthesized GA-DMF were systematically characterized by UV–vis photoluminescence spectroscopy, revealing strong fluorescence. Further, gain insights into size structural, elemental, chemical composition, Fourier transform infrared, dynamic light scattering, high-resolution transmission electron microscopy (HR-TEM), X-ray diffraction, photoelectron spectroscopy characterization techniques performed. HR-TEM analysis confirmed formation uniformly spherical with an average particle 16 ± 6.1 nm. Notably, exhibited selective turn-on response Pb2+ ions aqueous solutions, was attributed chelation-enhanced fluorescence mechanism. detection limit determined be low 7.15 × 10–7 M, broad linear range 30–130 μM, underscoring sensitivity practical application water quality monitoring. This study introduces novel, sustainable approach synthesizing nitrogen-doped outstanding highlights unprecedented selectivity toward ions, advancing development efficient eco-friendly platforms heavy metal detection.

Language: Английский

Citations

2
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
Radiation-synthesis of covalent bonding heterojunctions for selective solar-driven CO2 reduction DOI
Weidong Hou,

Huazhang Guo,

Kang Wang

et al.

Materials Today, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

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
Photocatalytic activity of MnCl and Cu 5,10,15,20-Tetrakis(4-aminophenyl) porphyrins conjugated to graphene quantum dots against Rhodamine B dye using visible light DOI Creative Commons

Mbulelo Jokazi,

Mope E. Malefane,

Tracy Giota Tebogo Moraba

et al.

Journal of Water Process Engineering, Journal Year: 2025, Volume and Issue: 71, P. 107188 - 107188

Published: Feb. 8, 2025

Language: Английский

Citations

1
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
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