Year: 2024
Type: article
Abstract: A sonochemical synthesis of SnS2 quantum dots using acetone as a solvent is investigated. Two different tin sources (SnCl2∙2H2O or SnCl4∙5H2O) as well as two different sulfur sources (thioacetamide or Na2S2O3) were applied. The sonication time was also varied between 60 and 120 min. Resulting products of syntheses were characterized with the following techniques: powder X-ray diffraction, electron microscopy (SEM and HR-TEM), Raman and FT-IR spectroscopies, the Tauc method, and X-ray photoelectron spectroscopy. Obtained SnS2 nanostructures were in the form of quantum dots in the case of synthesis lasting 60 min (size of crystallites in the range of 3.5–7 nm) and in the form of elongated nanorods of length ca. 25–30 nm and width of 5–6 nm in the case of synthesis lasting 120 min. XPS analyses revealed that the surface of the obtained products contained a significant amount of tin at the second oxidation state (i.e., SnS). The quantum dots produced in the synthesis lasting 60 min showed a value of energy bandgap of 2.7 eV indicating potential applications in photocatalysis.
Source: Materials
DOI: 10.3390/ma18010082
Authors: Grzegorz Matyszczak, Krzysztof Krawczyk, Albert Yedzikhanau, Cezariusz Jastrzębski, Piotr Dluzewski, Aleksandra Fidler, Tomasz Płociński, Krystyna Ławniczak-Jabłońska, Anna Wolska, Aleksandra Drzewiecka-Antonik
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,955
Funder: Politechnika Warszawska
Award: G7749001779
OpenAlex ID: W4405968105