Related Experiment Video
Updated: Feb 4, 2026

Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma
Published on: February 2, 2012
Synthesis and characterization of heterostructured carbon nanodots derived from Pinus pinea L. bark for enhanced Fe3+
1Medicinal- Aromatic Plants Application and Research Centre, Artvin Coruh University Artvin 0800 Turkiye gumrukcuogluabidin@artvin.edu.tr.
Abstract:
Pinus pinea L. bark residues were utilized for the environmentally friendly synthesis of PP300-3 carbon nanodots (synthesized via pyrolytic treatment at 300 °C for 3 hours). Comprehensive structural characterization employing high-resolution transmission electron microscopy (HR-TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) revealed a hybrid nanostructure comprising crystalline graphitic domains and amorphous carbon regions. This heterogeneous structure provides excellent photoluminescent properties with a quantum yield of 3.8%. Photoluminescent characteristics were investigated through wavelength-dependent optical studies, revealing optimal photon emission efficiency at 320 nm. Screening experiments with thirty-three metal ions demonstrated that Fe3+ exhibited high selectivity. Although five metal ions (Au3+, Bi3+, Pd2+, Pt2+) caused some fluorescence quenching, only Fe3+ demonstrated a linear dose-dependent response suitable for quantitative analysis. With excellent analytical performance (R 2 = 0.9926, RSD < 2%, LOD = 35.43 µg L-1), a simple spectrofluorometric protocol for Fe3+ determination was developed and validated in real water samples, achieving 99.56% recovery rates. Antioxidant evaluation using FRAP, CUPRAC, and DPPH assays demonstrated significant free-radical scavenging efficiency. Low SC50 concentrations (4.36 ± 0.92 mg mL-1) indicate robust electron-transfer capacity and valuable antioxidant activity. In conclusion, PP300-3 carbon nanodots represent a versatile platform material with simple synthesis, environmentally friendly production, excellent analytical performance, and significant antioxidant activity, making them suitable for environmental monitoring, water quality control, and biomedical research.
More Related Videos
Related Concept Videos
The Sense of Self: Reflected Self-Appraisal and Social Comparison
The Carbon Cycle
Self-Evaluation: Self-Enhancement and Self-Verification
Carbon Skeletons
Synthesis and Decomposition Reactions
Introduction to Special Senses

