Sol-gel synthesis and properties of mixed hydrated oxides H{sub x}V{sub x}W{sub 1-x}O{sub 3}{center_dot}nH{sub 2}O

Journal Article · Tue Nov 02 00:00:00 EST 2004 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2004.07.012· OSTI ID:20883053

Zakharova, G S ^[1]; Volkov, V L ^[1]

---

1. Institute of Solid-State Chemistry, Ural Division, Russian Academy of Sciences, Pervomaiskaya ul. 91, Yekaterinburg 620219 (Russian Federation)

Compounds of the general formula H{sub x}V{sub x}W{sub 1-x}O{sub 3}{center_dot}nH{sub 2}O have been prepared from peroxide solutions using the sol-gel process. Of these compounds, three phases are orthorhombic: WO{sub 3}{center_dot}1.5H{sub 2}O (a = 7.68(3) A, b = 13.81(5) A, c = 7.39(3) A), H{sub 0.08}V{sub 0.08}W{sub 0.92}O{sub 3}{center_dot}1.2H{sub 2}O (a = 5.208(3) A, b = 10.607(9) A, c = 5.079(3) A), and H{sub 0.17}V{sub 0.17}W{sub 0.83}O{sub 3}{center_dot}1.5H{sub 2}O (a = 7.60(3) A, b = 13.86(5) A, and c = 7.37(3) A); and two phases (with x = 0.25 and 0.33; n = 1) are amorphous as probed by X-rays. The thermal properties, IR, and X-ray photoelectron spectra of the compounds synthesized have been studied. The scenario of phase relations of the H{sub 2}O-H-WO{sub 3}-V{sub 2}O{sub 5} system has been proposed.

• OSTI ID: 20883053
• Journal Information: Materials Research Bulletin, Vol. 39, Issue 13; Other Information: DOI: 10.1016/j.materresbull.2004.07.012; PII: S0025-5408(04)00235-1; Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTROSCOPY
CHEMICAL PREPARATION
ELECTRICAL PROPERTIES
INFRARED SPECTRA
ORTHORHOMBIC LATTICES
PEROXIDES
SOL-GEL PROCESS
THERMAL GRAVIMETRIC ANALYSIS
THERMODYNAMIC PROPERTIES
TUNGSTATES
TUNGSTEN OXIDES
VANADATES
VANADIUM OXIDES
X RADIATION
X-RAY PHOTOELECTRON SPECTROSCOPY