Issue 41, 2023

Sensing nitrophenols and luminescent ink applications of sulfur quantum dots

Abstract

Hydrothermal preparation was used to create stable luminous sulfur quantum dots (SQDs), and XRD, XPS, TEM, and FTIR analyses were used to assess their structural and morphological characteristics. With an average size of 5.5 2.0 nm, the SQDs had an S8 monoclinic crystal structure. The SQDs’ 415 nm excitation-independent emission at an excitation wavelength of 342 nm was discovered by optical characterization. Nitrophenols (4- and 2-nitrophenol) having detection limits of 46 and 171 nM, respectively, were successfully detected using high quantum yield (72%) SQDs. Real sample analysis has been conducted with bottled, tap, and river water. The supporting investigation analyzed the fluorescence quenching mechanism and highlighted the probable static quenching phenomenon. SQDs are also an anti-counterfeiting material because of their high luminescence characteristics and have been successfully used as fluorescent ink.

Graphical abstract: Sensing nitrophenols and luminescent ink applications of sulfur quantum dots

Supplementary files

Article information

Article type
Paper
Submitted
24 Jul 2023
Accepted
13 Sep 2023
First published
14 Sep 2023

New J. Chem., 2023,47, 18945-18956

Sensing nitrophenols and luminescent ink applications of sulfur quantum dots

S. K. Tammina, R. Priyadarshi and J. Rhim, New J. Chem., 2023, 47, 18945 DOI: 10.1039/D3NJ03447J

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