Carbon Dots Derived from Coffee Residue for Sensitive and Selective Detection of Picric Acid and Iron(III) Ions

A facile method was developed to prepare carbon dots(CDs) by pyrolysis and etching of coffee residue. The as-prepared CDs show uniform spherical nanoparticles with an average size of 2.3 nm and exhibit excitation-dependent fluorescence emissions. Moreover, CDs also exhibit strong fluorescence quench...

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Bibliographic Details
Published inChemical research in Chinese universities Vol. 37; no. 3; pp. 623 - 628
Main Authors Zong, Siyu, Wang, Bolun, Ma, Wenyan, Yan, Yan, Li, Jiyang
Format Journal Article
LanguageEnglish
Published Changchun Jilin University and The Editorial Department of Chemical Research in Chinese Universities 01.06.2021
Springer Nature B.V
Subjects
Analytical Chemistry
Carbon dots
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Ethanol
Fluorescence
Inorganic Chemistry
Nanoparticles
Nitro compounds
Organic Chemistry
Photoluminescence
Physical Chemistry
Pyrolysis
Residues
Coffee residue
Carbon dot
Detection
Luminescence
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Summary:A facile method was developed to prepare carbon dots(CDs) by pyrolysis and etching of coffee residue. The as-prepared CDs show uniform spherical nanoparticles with an average size of 2.3 nm and exhibit excitation-dependent fluorescence emissions. Moreover, CDs also exhibit strong fluorescence quenching to nitro compounds and metal ions in both water and ethanol solutions, which could act as a platform for dual detection of PA(picric acid) and Fe 3+ ions with low detection limits of 0.26 and 0.83 µmol/L, respectively. This work provides a novel method for preparation of environmental-friendly fluorescent CDs and shows their potential applications in photoluminescence sensors.
ISSN:1005-9040
2210-3171
DOI:10.1007/s40242-021-1028-3