Nonstoichiometry, structure and properties of nanocrystalline oxides, carbides and sulfides

The results of recent experimental studies of the influence of the size of oxide, carbide and sulfide nanoparticles on changes in their nonstoichiometry are analyzed and generalized. In relation to intrinsically nonstoichiometric titanium oxides and niobium and vanadium carbides, on the one hand, an...

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Bibliographic Details
Published inRussian chemical reviews Vol. 90; no. 5; pp. 601 - 626
Main Authors Valeeva, Albina A., Rempel, Andrey A., Rempel, Svetlana V., Sadovnikov, Stanislav I., Gusev, Aleksandr I.
Format Journal Article
LanguageEnglish
Published London Uspekhi Khimii, Russian Academy of Sciences and Turpion Ltd 01.05.2021
IOP Publishing
Subjects
Carbides
Chemical composition
Chemical compounds
Nanocrystals
Nanoparticles
Niobium
Particle size
Sulfides
Titanium oxides
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Summary:The results of recent experimental studies of the influence of the size of oxide, carbide and sulfide nanoparticles on changes in their nonstoichiometry are analyzed and generalized. In relation to intrinsically nonstoichiometric titanium oxides and niobium and vanadium carbides, on the one hand, and stoichiometric silver sulfides, on the other hand, it is shown that a decrease in the particle size to the nano scale has a strong impact on the chemical composition of nanocrystalline compounds, viz ., it leads to the occurrence of or increase in nonstoichiometry. A conclusion is drawn that interplay between the particle size and nonstoichiometry is common to all solid nanocrystalline substances and should be taken into account in studies on the synthesis, structure and properties of these systems. The bibliography includes 260 references.
ISSN:0036-021X
1468-4837
DOI:10.1070/RCR4967