Issue 21, 2019

Mint leaf derived carbon dots for dual analyte detection of Fe(iii) and ascorbic acid

Abstract

Highly luminescent carbon dots (CDs) are obtained from mint leaves adopting a simple and cost effective route devoid of additional chemical reagents and functionalization. The as-synthesized CDs are characterized by TEM, FE-SEM, XRD analysis, FTIR, Raman, UV-visible and photoluminescence spectral studies. The results reveal that the CDs have an average diameter of 4 nm with a hydroxyl-rich surface. The luminescence of the dots was excitation dependent and was stable towards variation in the medium. The system could perform as a promising on–off–on fluorescent sensor for the selective and sensitive dual analyte recognition of Fe3+ and AA with a detection limit of 374 nM and 79 nM, respectively. The mechanism of ascorbic acid sensing by the CD–Fe3+ unit is established by identifying the binding sites of the biomolecule with the metal ion by examining the behaviour of the sensor in the presence of ascorbic acid derivatives.

Graphical abstract: Mint leaf derived carbon dots for dual analyte detection of Fe(iii) and ascorbic acid

Article information

Article type
Paper
Submitted
19 mar 2019
Accepted
04 apr 2019
First published
16 apr 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 12070-12077

Mint leaf derived carbon dots for dual analyte detection of Fe(III) and ascorbic acid

V. Raveendran, A. R. Suresh Babu and N. K. Renuka, RSC Adv., 2019, 9, 12070 DOI: 10.1039/C9RA02120E

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