Issue 38, 2020

N-doped oxidized carbon dots for methanol sensing in alcoholic beverages

Abstract

Methanol (MeOH) adulteration in alcoholic beverages resulting in irreparable health damage demands highly sensitive and cost-effective sensors for its quantification. As carbon dots are emerging as new biocompatible and sustainable light-emitting detectors, this work demonstrates the hydrothermally prepared nitrogen-doped oxidized carbon dots (NOCDs) as on-off fluorescent nanoprobes to detect MeOH traces in water and alcoholic beverages. The presence of 1% of MeOH in distilled water is found to decrease the NOCD fluorescent emission intensity by more than 90% whereas up to 70% ethanol (EtOH) content changes the signal to within 20% of its initial value. HR-TEM analysis reveals the agglomeration of the nanoprobes suspended in MeOH. Due to their selectivity towards MeOH, the fluorescent nanoprobes were successfully tested using a few MeOH spiked branded and unbranded Mexican alcoholic beverages. Varying degrees of signal quenching is observed from the fluorescent nanoprobes dispersed in different pristine beverages with a detection limit of less than 0.11 v%. Herein, we establish a new perspective towards economically viable non-toxic fluorescent probes as a potential alternative for the detection of MeOH in alcoholic beverages.

Graphical abstract: N-doped oxidized carbon dots for methanol sensing in alcoholic beverages

Supplementary files

Article information

Article type
Paper
Submitted
24 מרץ 2020
Accepted
02 יונ 2020
First published
12 יונ 2020
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2020,10, 22522-22532

N-doped oxidized carbon dots for methanol sensing in alcoholic beverages

M. Latha, R. Aruna-Devi, N. K. R. Bogireddy, S. E. S. Rios, W. L. Mochan, J. Castrellon-Uribe and V. Agarwal, RSC Adv., 2020, 10, 22522 DOI: 10.1039/D0RA02694H

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