najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2026-17-1-90-96najo-1692Research ArticleCHEMISTRY AND MATERIALS SCIENCEХИМИЯ И НАУКА О МАТЕРИАЛАХStability of solid-phase heteronanostructures based on zinc and silver sulfides to oxidationСтабильность твердофазных гетеронаноструктур сульфидов цинка и серебра к окислению на воздухеhttps://orcid.org/0000-0002-2033-154XСадовниковС. И.SadovnikovS. I.

Stanislav I. Sadovnikov

Pervomaiskaya, 91, Ekaterinburg, 620990

sadovnikov@ihim.uran.ruInstitute of Solid State Chemistry of the Ural Branch of the Russian Academy of SciencesRussian Federation2026040320261719096Copyright © Sadovnikov S.I., 20262026Садовников С.И.Sadovnikov S.I.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/1692

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.

Впервые изучена термическая стабильность фазового состава сульфидных гетеронаноструктур сульфида (ZnS)(Ag2S)x Твердофазные гетеронаноструктуры (ZnS)(Ag2S)x с x = 0.002-0.50 синтезированы методом гидрохимического соосаждения сульфидов ZnS и Ag2S. Размер наночастиц ZnS, оцененный по уширению дифракционных отражений, в полученных исходных гетеронаноструктурах составляет 2–4 нм. Отжиг синтезированных гетеронаноструктур (ZnS)(Ag2S)x на воздухе при температуре от 25 до 530 °C и выше приводит к изменению их фазового состава за счет окисления кубического сульфида ZnS до гексагонального оксида цинка. Окисление начинается при температуре ~250 °C; размер наночастиц ZnO варьируется в диапазоне от 12 до 17–25 нм. Окисление твердофазных гетеронаноструктур (ZnS)(Ag2S)x на воздухе показало, что потеря веса, происходящая при нагревании от ~250 до ~430-450 °C, связана с началом окисления сульфида ZnS и образованием оксида ZnO. Наиболее значительная потеря веса наблюдается после нагревания от ~450 до ~580 °C из-за увеличения содержания ZnO, окисления серы и ее удаления в виде SO2.

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The authors declare that there are no conflicts of interest present.