This article is devoted to the investigation of water sorption by the layered perovskite-type titanate K2Nd2Ti3O10 and its intercalated protonated derivatives HxK2−xNd2Ti3O10·yH2O in a humid atmosphere. K2Nd2Ti3O10 was synthesized by the solid-state reaction. Metastable HxK2−xNd2Ti3O10·yH2O compounds were obtained by water flushing. The determination of the samples composition was carried out by XRD and TG analysis. The stability in a humid atmosphere was investigated by a water vapor sorption analyzer. It was found that humid atmosphere has influence only on K2Nd2Ti3O10 while HxK2−xNd2Ti3O10·yH2O phases are stable under experimental conditions. The study of K2Nd2Ti3O10 in humid atmosphere has shown that the intercalation process proceeds with a rate constant kint = 3.2 × 10−6 min−1 at 0–95% RH, and the protonation process takes place at RH more than 80%.
Предметные области Scopus
- Физика конденсатов
- Физическая и теоретическая химия