Facile Conversion of Toxic Cigarette Butts to N,S-Codoped Carbon Dots and Their Application in Fluorescent Film, Security Ink, Bioimaging, Sensing and Logic Gate Operation.

ABSTRACT: The present work is emphasized on converting toxic cigarette butts (CBs) into highly fluorescent N,S-codoped carbon dots by a facile hydrothermal approach and exploring their multiple applications. The as-produced carbon dots (CBCDs) exhibited bright and stable fluorescence with a quantum yield of 26% and used as a label-free probe for "on-off-on" sequential detection of Fe³⁺ and ascorbic acid (AA). The fluorescence of CBCDs can be significantly quenched by Fe³⁺ ions through static quenching and restored upon the subsequent addition of AA due to the reduction of Fe³⁺ to Fe²⁺ by AA. This nanoprobe presented great selectivity and excellent sensitivity to Fe³⁺ and AA with a detection limit of 0.13 and 0.2 μM, respectively. Furthermore, th

SUBMITTER: Bandi R 

PROVIDER: S-EPMC6217634 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature