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

Paper ID Volume ID Publish Year Pages File Format Full-Text
43573 45977 2008 6 PDF Available
Title
Hydrothermal synthesis of vanadate-substituted hydroxyapatites, and catalytic properties for conversion of 2-propanol
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.

Graphical abstractM-vanadate hydroxyapatites and M-phosphate hydroxyapatites (M = Ca, Sr, and Pb) were synthesized at 110 °C for 14 h under a hydrothermal condition. The acid–base catalysis of the M-vanadate hydroxyapatites was depended on the component ions of the hydroxyapatites in the reaction of 2-propanol. The catalytic activity of M-vanadate hydroxyapatites was higher than those of M-phosphate hydroxyapatites.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Vanadate hydroxyapatite; Phosphate hydroxyapatite; Acid–base catalysis; 2-Propanol
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Hydrothermal synthesis of vanadate-substituted hydroxyapatites, and catalytic properties for conversion of 2-propanol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 348, Issue 1, 30 September 2008, Pages 129–134
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
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