Molybdenum Disulfide Quantum Dots as a Photoluminescence Sensing Platform for 2,4,6-Trinitrophenol Detection
Abstract
Transition metal chalcogenides, especially molybdenum disulfide (MoS2), have recently attracted wide attention from researchers as graphene-analogous materials. However, until now, little literature has reported the synthesis of photoluminescent MoS2 materials and their applications in analytical chemistry. We herein presented a facile bottom-up hydrothermal route for the synthesis of photoluminescent MoS2 quantum dots (QDs) by using sodium molybdate and cysteine as precursors. The prepared MoS2 QDs were characterized by transmission electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, photoluminescence spectroscopy, and UV-vis spectroscopy. The MoS2 QDs were then used as photoluminescent probes to construct a photoluminescence (PL) quenching sensor for detection of 2,4,6-trinitrophenol (TNP). The TNP sensor presented a wide linear range from 0.099 to 36.5 μM with a high detection limit of 95 nM. Furthermore, the sensor displayed a high sensitivity toward TNP over other structurally similar compounds like 2,4,6-trinitrotoluene, p-chlorophenol, phenol, and 2,6-di-tert-butyl-4-methylphenol. To understand the origin of the high sensitivity, we assessed the emission wavelength-dependent PL quenching behavior of MoS2 QDs by the above five compounds using Stem-Volmer equation in detail. The results showed that the novel approach we put forward can satisfactorily explain the interaction mechanisms between MoS2 QDs a…
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The MoS2 quantum dots exhibit four UV-Vis peaks at 384, 446, 605, and 668 nm; the 384 and 446 nm peaks correspond to valence band to conduction band transition and the 605 and 668 nm peaks are assigned to the Brillouin zone of the K point.
“MoS2 QDs exhibit four peaks; the two peaks at 384 and 446 nm correspond to valence band to the conduction band transition, and next two peaks at 605 and 668 nm are assigned to the Brillouin zone of K point.[26,27]”
From Engineering of MoS<sub>2</sub> Quantum Dots/PANI Aerogel for High Performance Supercapaciator (2019) · cites this paper as [27]
Cites
The chemistry of two-dimensional layered transition metal dichalcogenide nanosheets
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Charge Transfer in the MoS<sub>2</sub>/Carbon Nanotube Composite
Koroteev, V. O., Bulusheva, L. G., Asanov, I. P., Shlyakhova, E. V., Vyalikh, D. V., & Okotrub, A. V. (2011) · The Journal of Physical Chemistry C · doi:10.1021/jp205939e · Cited by 286 · see citing works
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Engineering of MoS<sub>2</sub> Quantum Dots/PANI Aerogel for High Performance Supercapaciator
Das, S., & Nandi, A. K. (2019) · Macromolecular Symposia · doi:10.1002/masy.201800242 · Cited by 10 · see citing works
- Authors
- Wang, Y., & Ni, Y.
- Affiliations
- Nanchang University (CN)
- Corresponding author
- Ni, Yongnian
- ORCID
- Ni, Yongnian
- Venue
- Analytical Chemistry
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-07-16
- Volume
- 86
- Issue
- 15
- Pages
- 7463-7470
- ISSN
- 0003-2700 (ISSN-L)
- 1520-6882
- OpenAlex
- W1972910944
- Cited by
- 422
- References
- 3
- Citations by year
- 2026: 11 · 2025: 16 · 2024: 37 · 2023: 38 · 2022: 34 · 2021: 32 · 2020: 44 · 2019: 53 · 2018: 50 · 2017: 35 · 2016: 38 · 2015: 27 · 2014: 7
- FWCI
- 16.19
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Analytical Chemistry (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China (NSFC621065007, NSFC621305061)
- Natural Science Foundation of Jiangxi Province (20132BAB213011)
- Jiangxi Provincial Department of Education (GJJ13026)
- State Key Laboratory of Chemo/Biosensing and Chemometrics of Hunan University (SKLCBC62013010)
- State Key Laboratory of Food Science and Technology of Nanchang University (SKLF-ZZA-201302, SKLF-ZZB-201303)
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Carbon and Quantum Dots Applications
- Physical Sciences › Materials Science › Materials Chemistry › Quantum Dots Synthesis And Properties
- Physical Sciences › Materials Science › Materials Chemistry › 2D Materials and Applications
- Keywords
- molybdenum disulfide quantum dots, 2,4,6-trinitrophenol detection, transition metal chalcogenides, hydrothermal synthesis, cysteine precursor, resonance energy transfer, excitation energy transfer, electrostatic interactions, water sample analysis
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