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High luminescent carbon dots as an eco-friendly fluorescence sensor for Cr(VI) determination in water and soil samples
- Source :
- Journal of Photochemistry and Photobiology A: Chemistry. 346:502-511
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- In this work were synthesized highly luminescent carbon dots for use as fluorescence sensor for Cr(VI). Carbon dots (CDots) were prepared by pyrolysis of the mixture of molecular precursors as citric acid and reduced glutathione. Pyrolysis revealed to be a simple procedure that afforded CDots with a photoluminescence quantum yield of 69.4%, and particle size of about 2.5 nm. To explore the analytical potentiality of the nanomaterial produced, the CDots were applied as fluorescent sensors to determine Cr(VI) in water and soil samples. The interaction mechanism between CDots and Cr(VI) is associated with both inner filter effect and static quenching. After optimization of the main analytical parameters, the method showed a linear range of 0.10–12 μg mL −1 with limit of detection (LOD) of 0.03 μg mL −1 (pH 7), and recoveries of 90–105% and 99.5–107% for samples of water and soil, respectively. Thus, the method proved to be sensitive, fast and versatile for applications in different environmental samples.
- Subjects :
- Detection limit
Quenching (fluorescence)
Chemistry
General Chemical Engineering
Analytical chemistry
General Physics and Astronomy
chemistry.chemical_element
Quantum yield
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
Nanomaterials
Particle size
0210 nano-technology
Luminescence
Carbon
Pyrolysis
Nuclear chemistry
Subjects
Details
- ISSN :
- 10106030
- Volume :
- 346
- Database :
- OpenAIRE
- Journal :
- Journal of Photochemistry and Photobiology A: Chemistry
- Accession number :
- edsair.doi...........bdf3588d383fe8a9323ca012ea97169e