Vanadia Gel Synthesis via Peroxovanadate Precursors. 1. In Situ Laser Raman and 51V NMR Characterization of the Gelation Process

Craig J. Fontenot, Jerzy W. Wiench, M. Pruski, G. L. Schrader

Research output: Contribution to journalArticle

97 Scopus citations

Abstract

Vanadium oxide gels derived from aqueous solutions of V2O5 and H2O2 have been investigated using in situ 51V NMR and laser Raman spectroscopic techniques. On the basis of this characterization, a pathway for peroxovanadate decomposition has been proposed, including the presence of two peroxovanadate dimers. New Raman bands and assignments for these species are reported. Gelation was observed to begin both during and after the peroxovanadate decomposition, depending on the initial molar ratios of H2O2/V and the total concentration of vanadium. Experimental 51V NMR evidence suggested that the VO2+ species was directly involved in the formation of the gel.

Original languageEnglish (US)
Pages (from-to)11622-11631
Number of pages10
JournalJournal of Physical Chemistry B
Volume104
Issue number49
DOIs
StatePublished - Dec 14 2000

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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