N, S-Doped Carbon Dots (N, S-CDs) for Perfluorooctane Sulfonic Acid (PFOS) Detection DOI Creative Commons
Hani Nasser Abdelhamid

C – Journal of Carbon Research, Journal Year: 2025, Volume and Issue: 11(2), P. 36 - 36

Published: May 29, 2025

Nitrogen and sulfur-co-doped carbon dots (N, S-CDs) were synthesized using a simple, eco-friendly hydrothermal technique with L-cysteine as the precursor. The synthesis approach produced highly water-dispersible, heteroatom-doped CDs surface functional groups comprising amine, carboxyl, thiol, sulfonic acid. Data analysis of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM) confirmed their amorphous nature, nanoscale dimensions (1–8 nm, average particle size 2.6 nm), chemistry. Optical examination revealed intense pure blue fluorescence emission under UV excitation, excitation-dependent behavior attributed to defects heteroatom doping. N, S-CDs applied fluorescent probes for detecting perfluorooctanesulfonic acid (PFOS), notable component perfluoroalkyl substances (PFAS) family, demonstrating pronounced concentration-dependent quenching. A linear detection range 3.33–20 µM limit (LOD) 2 reported probe. UV-Vis spectral shifts dye-interaction investigations indicated that sensing mechanism is regulated by non-covalent interactions, primarily electrostatic hydrophobic forces. These findings confirm potential be used effective optical sensors PFOS in environmental monitoring applications.

Language: Английский

N, S-Doped Carbon Dots (N, S-CDs) for Perfluorooctane Sulfonic Acid (PFOS) Detection DOI Creative Commons
Hani Nasser Abdelhamid

C – Journal of Carbon Research, Journal Year: 2025, Volume and Issue: 11(2), P. 36 - 36

Published: May 29, 2025

Nitrogen and sulfur-co-doped carbon dots (N, S-CDs) were synthesized using a simple, eco-friendly hydrothermal technique with L-cysteine as the precursor. The synthesis approach produced highly water-dispersible, heteroatom-doped CDs surface functional groups comprising amine, carboxyl, thiol, sulfonic acid. Data analysis of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM) confirmed their amorphous nature, nanoscale dimensions (1–8 nm, average particle size 2.6 nm), chemistry. Optical examination revealed intense pure blue fluorescence emission under UV excitation, excitation-dependent behavior attributed to defects heteroatom doping. N, S-CDs applied fluorescent probes for detecting perfluorooctanesulfonic acid (PFOS), notable component perfluoroalkyl substances (PFAS) family, demonstrating pronounced concentration-dependent quenching. A linear detection range 3.33–20 µM limit (LOD) 2 reported probe. UV-Vis spectral shifts dye-interaction investigations indicated that sensing mechanism is regulated by non-covalent interactions, primarily electrostatic hydrophobic forces. These findings confirm potential be used effective optical sensors PFOS in environmental monitoring applications.

Language: Английский

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