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Sensitive and selective chemosensor for Fe3+ detection using carbon dots synthesized by microwave method
Xiang Deng1, Huan Yang2, An-Jie Gong3
1Department of Chemistry and Chemical Engineering, Sichuan Institute of Arts and Science, Dazhou, Sichuan 635000, China; Key Laboratory of Low-cost Rural Environmental Treatment Technology at Sichuan Institute of Arts and Science, Education Department of Sichuan Province, Dazhou, Sichuan 635002, China.
This study developed a novel fluorescence sensor using carbon dots derived from traditional Chinese medicine for detecting iron ions (Fe3+). The method offers rapid and sensitive detection of Fe3+ in water samples.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Materials Science
Background:
- Heavy metal ion accumulation poses risks to human health and ecosystems.
- Fluorescent carbon dots (CDs) are effective sensors for heavy metal ions.
- Developing novel, efficient, and eco-friendly sensors is crucial for water quality monitoring.
Purpose of the Study:
- To synthesize carbon dots (CDs) from Radix Vladimiriae for heavy metal ion detection.
- To investigate the fluorescence properties of the synthesized CDs.
- To establish a sensitive and rapid method for detecting Fe3+ in water samples.
Main Methods:
- One-step microwave synthesis of CDs using Radix Vladimiriae as a carbon source.
- Characterization of CDs' particle size and fluorescence quantum yield (QY).
- Spectroscopic analysis to determine the optimal excitation and emission wavelengths and Fe3+ detection parameters.
Main Results:
- CDs exhibited excellent fluorescence properties (QY ~0.15, particle size ~5.9 nm) with peak emission at 465 nm (excitation 360 nm).
- Fe3+ ions caused a significant decrease in CDs' fluorescence intensity.
- A linear relationship was established for Fe3+ detection (0.2–200 μM) with a low limit of detection (LOD) of 62 nM.
Conclusions:
- Novel CDs synthesized from Radix Vladimiriae serve as an effective fluorescent sensor for Fe3+ detection.
- The developed method is rapid, sensitive, and accurate for detecting Fe3+ in real water samples.
- This approach offers a promising tool for environmental monitoring and water quality assessment.
