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Title: Peculiarities of formation of phase composition, porous structure, and catalytic properties of tungsten oxide-based macroporous materials fabricated by sol–gel synthesis

The method of template sol–gel synthesis of tungsten oxide-based macroporous materials using ‘core–shell’ latex particles as colloid templates is described. The chemical composition and structural characteristics of the synthesized macroporous oxide systems have been investigated. The peculiarities of formation of material phase composition and macroporous structure under different template thermal destruction conditions have been revealed. An optimal method of a targeted synthesis of the crystalline tungsten(VI) oxide having a defect-free macroporous structure (average pore size 160 nm) and efficient catalytic properties under organic liquid phase oxidation conditions has been suggested. The prospects of the fabricated material application as catalysts of hydrothermal oxidation of radionuclide organic complexes at radioactive waste decontamination have been demonstrated. - Highlights: • Macroporous tungsten oxides were fabricated via sol–gel process. • The correlation between synthesis conditions and composition was determined. • Influence of synthesis conditions on porous structure has been explained. • The effects of template thermodestruction have been set up. • High potential of such materials for catalysis applications has been shown.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [2]
  1. Institute of Chemistry, Far East Branch, Russian Academy of Sciences, Prospect 100-let Vladivostoku, 159, Vladivostok 690022 (Russian Federation)
  2. (Russian Federation)
Publication Date:
OSTI Identifier:
22288737
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Characterization; Journal Volume: 88; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DECONTAMINATION; LATEX; PHASE TRANSFORMATIONS; POROUS MATERIALS; RADIOACTIVE WASTES; SURFACE PROPERTIES; SYNTHESIS; TUNGSTEN; TUNGSTEN OXIDES