Selective Synthesis of γ-WO3 and β-WO3.H2O by the Hydrothermal Treatment of Peroxotungstic Acid

被引：4
|
作者：
Bushkova, T. M. [1 ]
Egorova, A. A. [1 ]
Khoroshilov, A., V [1 ]
Ivanova, O. S. [1 ]
Yapryntsev, A. D. [1 ]
Baranchikov, A. E. [1 ]
Ivanov, V. K. [1 ]
机构：
[1] Russian Acad Sci, Kurnakov Inst Gen & Inorgan Chem, Leninskii Pr 31, Moscow 119991, Russia
来源：
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2021年 / 66卷 / 04期
基金：
俄罗斯科学基金会;
关键词：
tungsten trioxide; hydrothermal synthesis; disperse materials; tungsten(VI) oxide; peroxotungstic acid; TUNGSTEN-OXIDE FILMS; SOL-GEL PROCESS; WO3; NANOCRYSTALS; SOLVOTHERMAL SYNTHESIS; ELECTRICAL-PROPERTIES; PHASE-TRANSITIONS; TEMPERATURE; MORPHOLOGY; TRIOXIDE; FACILE;
D O I：
10.1134/S0036023621040070
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A selective method has been suggested for the synthesis of highly dispersed powders of gamma-WO3 (monoclinic) and beta-WO3.H2O (orthorhombic) by the hydrothermal treatment of aqueous suspensions of peroxotungstic acid in temperature range 70-250 degrees C. The hydrothermal treatment of suspensions of peroxotungstic acid leads to formation of monophase beta-WO3.H2O at temperature up to 100 degrees C and monophase gamma-WO3 at 250 degrees C. The hydrothermal treatment in the temperature range 120-200 degrees C gives two-phase samples of gamma-WO3 and beta-WO3.0.33H(2)O (orthorhombic syngony). The obtained monophase and two-phase powders have been studied by X-ray powder diffraction, scanning electron microscopy, IR spectroscopy, thermal analysis, and diffuse reflectance spectroscopy.
引用
收藏
页码：496 / 501
页数：6
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