Water sorption by the perovskite-like layered titanate K2Nd2Ti3O10 in humid atmosphere

被引：7

作者：

Utkina, Tatiana ^{[1
]}

Chislov, Mikhail ^{[1
]}

Myshenkov, Mikhail ^{[1
]}

Rodionov, Ivan ^{[1
]}

Zvereva, Irina ^{[1
]}

机构：

[1] St Petersburg State Univ, 7-9 Univ Skaya Nab, St Petersburg 199034, Russia

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2018年 / 134卷 / 01期

基金：

俄罗斯基础研究基金会;

关键词：

Layered perovskite-like oxides; Sorption; Hydration; Protonation; Thermogravimetry; PHOTOCATALYTIC PROPERTIES; OXIDES; HYDRATION; NA;

D O I：

10.1007/s10973-018-7017-1

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This article is devoted to the investigation of water sorption by the layered perovskite-type titanate K2Nd2Ti3O10 and its intercalated protonated derivatives HxK2-xNd2Ti3O10 center dot yH(2)O in a humid atmosphere. K2Nd2Ti3O10 was synthesized by the solid-state reaction. Metastable HxK2-xNd2Ti3O10 center dot yH(2)O 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 center dot yH(2)O phases are stable under experimental conditions. The study of K2Nd2Ti3O10 in humid atmosphere has shown that the intercalation process proceeds with a rate constant k(int) = 3.2 x 10(-6) min(-1) at 0-95% RH, and the protonation process takes place at RH more than 80%.

引用

页码：323 / 331

页数：9

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