Alkoxide-free sol-gel synthesis of aerogel iron-chromium mixed oxides with unique textural properties

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10 Citations (Scopus)

Abstract

Aerogel chromium-iron mixed oxide with equimolar amounts of both metals was prepared by a sol-gel method using nitrate salts of both metals. Propylene oxide was used as an efficient gelation promoter and supercritical CO 2 was employed for solvent extraction from the gel. The calcined mixed oxide showed significantly higher surface areas, larger pore volume, and enhanced thermal stability as compared with its xerogel counterpart and the corresponding single-metal oxides. Textural properties were compared at various calcination temperatures and unique textural properties were observed after calcinations at 350 °C.

Original languageEnglish
Pages (from-to)385-387
Number of pages3
JournalMaterials Letters
Volume68
DOIs
Publication statusPublished - Feb 1 2012

Keywords

  • Chromium-iron
  • Mixed oxides
  • Porous materials
  • Sol-gel preparation
  • Supercritical CO

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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