Fluorescence sensing of picric acid by ceria nanostructures prepared using fenugreek extract

Autor:	N. N. Binitha, K. C. Remani
Rok vydání:	2021
Předmět:	Detection limit Materials science Scanning electron microscope Nanoparticle Picric acid General Chemistry Absorbance chemistry.chemical_compound symbols.namesake chemistry X-ray photoelectron spectroscopy symbols Fourier transform infrared spectroscopy Raman spectroscopy Nuclear chemistry
Zdroj:	Journal of the Iranian Chemical Society. 19:619-633
ISSN:	1735-2428 1735-207X
DOI:	10.1007/s13738-021-02327-4
Popis:	Easy and fast detection of aquatic pollutants is highly desirable to avoid water contamination. This work is focused on the fluorescence detection of picric acid in water using sol–gel ceria nanoparticles synthesized in the presence of fenugreek extract. The nanostructure and material morphology of cubic phase fluorite ceria are analyzed using X-ray diffraction, Fourier Transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. Optical studies indicated its strong absorbance and intense photoluminescence emission. Sensing of picric acid is performed here by investigating the fluorescence quenching of the nanoparticle dispersion. Ceria showed a linear concentration range of 0.33–41.6 µM with a lower detection limit of 0.33 µM picric acid. The strong binding interaction between the nanoceria and picric acid is indicated from the high Stern–Volmer constant. The CeO2 nanoparticles are selective to picric acid with other phenolic compounds and also found to be sensitive to picric acid in real water samples.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8898aa8d6fb70caf95d4c4afd3fe4a0b https://doi.org/10.1007/s13738-021-02327-4 Zobrazit plný text záznamu Full text from SpringerLink