Hydrothermal synthesis of vanadate-substituted hydroxyapatites, and catalytic properties for conversion of 2-propanol

Shuhei Ogo, Ayumu Onda, Kazumichi Yanagisawa

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

M-vanadate hydroxyapatites and M-phosphate hydroxyapatites (M = Ca, Sr, and Pb) were synthesized at 110 °C for 14 h under a hydrothermal condition. The prepared powders were characterized by the ICP chemical analysis, the powder X-ray diffraction, the TEM observation, the nitrogen physisorption, the TG analysis, and the CO2-TPD measurements. The catalytic properties for the reaction of 2-propanol depended on the component ions of the prepared hydroxyapatites. In an argon atmosphere, the acetone selectivity of the prepared hydroxyapatite catalysts increased in the following order: Ca < Sr < Pb and vanadate < phosphate. The catalytic activity values of M-vanadate hydroxyapatites were higher than those of M-phosphate hydroxyapatites, except for Sr-vanadate hydroxyapatite which decomposed during the reaction at 250 °C. Hydrogen was stoichiometrically produced with acetone over the M-phosphate hydroxyapatites and Pb-vanadate hydroxyapatite with strong basic sites.

Original languageEnglish
Pages (from-to)129-134
Number of pages6
JournalApplied Catalysis A: General
Volume348
Issue number1
DOIs
Publication statusPublished - 2008 Sep 30
Externally publishedYes

Keywords

  • 2-Propanol
  • Acid-base catalysis
  • Phosphate hydroxyapatite
  • Vanadate hydroxyapatite

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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