Acidity of bimetallic silica composites prepared by a complexing agent assisted sol-gel method

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3 Citations (Scopus)

Abstract

Acidity of amorphous sol-gel aluminum silicates containing transition metals was investigated by using FTIR spectroscopy. The composites were prepared from metal alkoxides using diols as complexing agent. The samples were characterized by XRD, SEM, TEM, thermal analysis and BET surface measurement. Pyridine was used as probe molecule for the IR acidity measurements. H2 treatment enhances the amount of both Bronsted and Lewis acid sites in Al-containing samples, but has no significant effect on pure silica matrices. Lewis acidity is primarily determined by the type and amount of transition metals incorporated into the composite.

Original languageEnglish
Pages (from-to)39-42
Number of pages4
JournalJournal of Molecular Structure
Volume482-483
DOIs
Publication statusPublished - May 25 1999

Keywords

  • Acidity
  • Aluminum silicates
  • IR spectroscopy
  • Nanoparticles
  • Sol-gel method

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Organic Chemistry
  • Inorganic Chemistry

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