Influence of Formation Conditions on Physicochemical Properties of CsxV2O5·nH2O

N. V. Podval’naya; Подвальная Н. В.; G. S. Zakharova; Захарова Г. С.

doi:10.31857/S0044457X22601389

Influence of Formation Conditions on Physicochemical Properties of CsxV2O5·nH2O

作者: Podval’naya N.¹, Zakharova G.¹
隶属关系:
1. Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences
期: 卷 68, 编号 3 (2023)
页面: 300-309
栏目: СИНТЕЗ И СВОЙСТВА НЕОРГАНИЧЕСКИХ СОЕДИНЕНИЙ
URL: https://journals.rcsi.science/0044-457X/article/view/136323
DOI: https://doi.org/10.31857/S0044457X22601389
EDN: https://elibrary.ru/JCUAQO
ID: 136323

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详细

Cesium-containing compounds of hydrated vanadium(V) oxide of general formula СsxV2O5·nH2O, where 0.1 ≤ x ≤ 0.6 and 0.8 ≤ n ≤ 1.2, were prepared by hydrothermal, hydrolytic, and sol–gel processes. The preparation conditions were found to determine the intercalated cation (Cs+) homogeneity range and the vanadium(IV) percentage in the samples. The prepared compounds were characterized by a set of physicochemical methods, namely, IR spectroscopy, X-ray powder diffraction, thermogravimetric analysis, scanning electron microscopy, and low-temperature nitrogen adsorption. The СsxV2O5·nH2O compounds prepared by the hydrolytic and hydrothermal methods had the highest specific surface area, equal to 34.0 and 16.5 m2/g, respectively. The temperature-dependent electrical conductivities of СsxV2O5·nH2O samples were measured to estimate the activation energy of conduction in compounds having various vanadium(IV) percentages. It is only in the high-temperature range that the activation energy of conduction depended on the V4+ percentage in the sample; the least value was found in the hydrothermally prepared Сs0.6V2O5·H2O samples.

关键词

hydrated vanadium(V) oxide, cesium, hydrothermal method, hydrolytic precipitation, sol–gel technology, morphology, specific surface area, electrical conductivity

作者简介

N. Podval’naya

Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences

Email: podnat@inbox.ru
620990, Yekaterinburg, Russia

G. Zakharova

Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences

编辑信件的主要联系方式.
Email: podnat@inbox.ru
620990, Yekaterinburg, Russia

参考

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