Stability of solid-phase heteronanostructures based on zinc and silver sulfides to oxidation
https://doi.org/10.17586/2220-8054-2026-17-1-90-96
Abstract
For the first time the thermal stability of the phase composition of (ZnS)(Ag2S)x sulfide heteronanostructures are studied. Solid-phase heteronanostructures (ZnS)(Ag2S)x with x = 0.002 – 0.50 are synthesized by hydrochemical co-deposition of ZnS and Ag2S sulfides. The ZnS nanoparticle size, estimated from the broadening of diffraction reflections, in the produced initial heteronanostructures is 2 – 4 nm. Annealing of the synthesized (ZnS)(Ag2S)x heteronanostructures in air at temperature from 25 to 530 ◦C and above leads to a change in their phase composition due to the oxidation of cubic ZnS sulfide to hexagonal zinc oxide. Oxidation begins at a temperature of approximately 250 ◦C; the ZnO nanoparticle size varies in a range of 12 to 17 – 25 nm. Oxidation of solid-phase (ZnS)(Ag2S)x heteronanostructures in air showed that weight loss that occurs upon heating from ∼250 to ∼430 – 450 ◦C is associated with the beginning of oxidation of the ZnS sulfide and the formation of the ZnO oxide. The most significant weight loss is observed after heating from ∼450 to ∼580 ◦C due to an increase in the ZnO content, oxidation of sulfur and its removal in the form of SO2.
Supporting agencies: This study was carried out in accordance with the state assignment No. 124020600013-9 for the Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Sciences. Author is grateful to Dr. E.Yu. Gerasimov for help in the HAADF-STEM study.
About the Author
S. I. Sadovnikov
Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Sciences
Russian Federation
Russian Federation
Stanislav I. Sadovnikov
Pervomaiskaya, 91, Ekaterinburg, 620990
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Review
For citations:
Sadovnikov S.I. Stability of solid-phase heteronanostructures based on zinc and silver sulfides to oxidation. Nanosystems: Physics, Chemistry, Mathematics. 2026;17(1):90-96. https://doi.org/10.17586/2220-8054-2026-17-1-90-96
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