Solvothermal synthesis of vanadium phosphates in the form of xerogels, aerogels and mesostructures
- Institute of Sorption and Endoecology, National Academy of Sciences of Ukraine, 13 General Naumov Str., Kyiv 03164 (Ukraine)
- Faculty of Chemistry, Maria Curie-Sklodowska University, Maria Curie-Sklodowska Sq. 3, 20-031 Lublin (Poland)
Regularities and peculiarities of physicochemical changes, first of all phase transformations, during solvothermal treatment (with conventional and microwave heating) of the vanadium pentoxide and orthophosphoric acid mixture in organic solvents in the presence of reducing agents have been studied. Hemihydrate of vanadium hydrophosphate - the precursor of vanadium pyrophosphate, the active phase for n-butane to maleic anhydride oxidation, and ion exchanger with variable physicochemical characteristics, i.e. crystal structure, specific surface area, crystallite size and acidic properties - has been synthesized in the temperature range 170-200 {sup o}C. The obtained phases were examined using XRD, DTA-TG, SEM, FTIR spectroscopy, nitrogen adsorption as well as gas chromatographic determination of acidity through organic bases adsorption. The catalytic activity of prepared samples for n-butane oxidation has been investigated.
- OSTI ID:
- 22207365
- Journal Information:
- Materials Research Bulletin, Vol. 45, Issue 9; Other Information: Copyright (c) 2010 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
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Related Subjects
ADSORPTION
BUTANE
CRYSTAL STRUCTURE
DIFFERENTIAL THERMAL ANALYSIS
FOURIER TRANSFORMATION
GAS CHROMATOGRAPHY
GELS
INFRARED SPECTRA
ORGANIC SOLVENTS
PHASE TRANSFORMATIONS
REDUCING AGENTS
SCANNING ELECTRON MICROSCOPY
SPECTROSCOPY
SYNTHESIS
TEMPERATURE RANGE
VANADIUM
VANADIUM OXIDES
VANADIUM PHOSPHATES
X-RAY DIFFRACTION