Enhanced Photocatalytic Activity of ZnS:Mn2+ Quantum Dots
- Authors: Sergeeva K.A.1, Sergeev A.A.1, Postnova I.V.2,3, Shchipunov Y.A.3, Voznesenskiy S.S.1
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Affiliations:
- Institute of Automation and Control Processes of Far-Eastern Branch of Russian Academy of Sciences
- Far-Eastern Federal University
- Institute of Chemistry of Far-Eastern Branch of Russian Academy of Sciences
- Issue: Vol 53, No 16 (2019)
- Pages: 2151-2154
- Section: Quantum Wells and Quantum Dots
- URL: https://journals.rcsi.science/1063-7826/article/view/207623
- DOI: https://doi.org/10.1134/S1063782619120261
- ID: 207623
Cite item
Abstract
The photocatalytic activity of Mn2+ doped ZnS quantum dots stabilized by glutathione capping agent in aqueous media was studied in situ by photoluminescence spectroscopy. The methylene blue was chosen as model organic dye for photodecomposition under excitation in near UV-range. It is shown that the rate of photodegradation of the methylene blue depends strictly on the concentration of the manganese activator ions and the presence of its own intrinsic defects in the host ZnS crystal lattice. It is found that the most effective photocatalyst are ZnS quantum dots doped with 0.25 at % of Mn2+ providing the total dye decolorization within 5 minutes.
About the authors
K. A. Sergeeva
Institute of Automation and Control Processes of Far-Eastern Branch of Russian Academy of Sciences
Author for correspondence.
Email: kspetrovyh@mail.ru
Russian Federation, Vladivostok, 690041
A. A. Sergeev
Institute of Automation and Control Processes of Far-Eastern Branch of Russian Academy of Sciences
Author for correspondence.
Email: sergeev@iacp.dvo.ru
Russian Federation, Vladivostok, 690041
I. V. Postnova
Far-Eastern Federal University; Institute of Chemistry of Far-Eastern Branch of Russian Academy of Sciences
Author for correspondence.
Email: postnovairina@yandex.ru
Russian Federation, Vladivostok, 690091; Vladivostok, 690022
Y. A. Shchipunov
Institute of Chemistry of Far-Eastern Branch of Russian Academy of Sciences
Author for correspondence.
Email: yas@ich.dvo.ru
Russian Federation, Vladivostok, 690022
S. S. Voznesenskiy
Institute of Automation and Control Processes of Far-Eastern Branch of Russian Academy of Sciences
Author for correspondence.
Email: vss@iacp.dvo.ru
Russian Federation, Vladivostok, 690041