Nanoscale Metal Oxide Particles/Clusters as Chemical Reagents. Synthesis and Properties of Ultrahigh Surface Area Magnesium Hydroxide and Magnesium Oxide

Suchada Utamapanya, Kenneth J. Klabunde, John R. Schlup

Research output: Contribution to journalArticle

345 Scopus citations

Abstract

A modified autoclave hypercritical drying procedure has been used to prepare a hydrated form of MgO from Mg(OCH3)2 in a methanol-toluene solvent mixture. This material was prepared with 1000 m2/g surface area and 35-Å crystallite size. Heat treatment of this precursor at 500 °C under vacuum yielded the dehydrated MgO with 500 m2/g surface area and 45-Å crystallite size. The samples were further characterized by Fourier transform infrared/photoacoustic spectroscopy (FT-IR/PAS), X-ray diffraction, scanning electron microscopy, and chemical analyses. The hydrated precursor contained some residual -OCH3 groups and was much less crystalline in appearance than conventionally prepared MgO-Mg(OH)2 samples. The dehydrated material was free of -OCH3 groups and was made up of much smaller crystallites than conventionally prepared MgO.

Original languageEnglish (US)
Pages (from-to)175-181
Number of pages7
JournalChemistry of Materials
Volume3
Issue number1
DOIs
StatePublished - Jan 1 1991

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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