Abstract: Homogeneously mixed mesoporous VOx/MgO aerogels with vanadium concentrations ranging up to 26 wt.% with the surface area as high as 1200 m2/g were synthesized by hydrolysis of a mixture of vanadium and magnesium alkoxides followed by gelation and high-temperature supercritical drying. Dehydration conditions were optimized to obtain nanocrystalline VOx/MgO oxides with the surface area exceeding 450 m2/g after calcination at 550 °C. The synthesized aerogels were extensively characterized by physicochemical methods (XRD, NMR, HRTEM, EDX). According to the EDX data, vanadium atoms were very uniformly distributed in the MgO structure of the mixed oxide aerogels. No magnesium vanadate phases were observed by XRD in the samples with the vanadium concentrations 26% or lower. As the vanadium concentration increased, vanadium ions were introduced into the MgO nanocrystals changing their symmetry from the initial cubic (Fm3 m) to orthorhombic (Cmca). Simulation of the XRD patterns of as-prepared aerogels suggests that the Mg(OH)2 phase in these samples is substantially distorted due to the presence of methoxide groups between the layers.

Cite: Ilyina E.V. , Mishakov I.V. , Vedyagin A.A. , Cherepanova S.V. , Nadeev A.N. , Bedilo A.F. , Klabunde K.J.
Synthesis and Characterization of Mesoporous VOx/MgO Aerogels with High Surface Area
Microporous and Mesoporous Materials. 2012. V.160. P.32-40. DOI: 10.1016/j.micromeso.2012.04.016 WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Submitted:	Jan 17, 2012
Accepted:	Apr 10, 2012
Published online:	Apr 20, 2012
Published print:	Sep 1, 2012

Identifiers:

Web of science:	WOS:000307150700005
Scopus:	2-s2.0-84861408935
Elibrary:	20470606
Chemical Abstracts:	2012:1024624
Chemical Abstracts (print):	157:339301
OpenAlex:	W2037440055

Citing:

DB	Citing
Web of science	35
Scopus	35
Elibrary	45
OpenAlex	34

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