Synthesis and structural characterization of silica-hybridized hydroxyapatite with gas adsorption capability

Eiji Fujii, Koji Kawabata, Kanae Ando, Kanji Tsuru, Satoshi Hayakawa, Akiyoshi Osaka

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Silica-hybridized hydroxyapatite powder was prepared from a calcium hydroxide and phosphoric acid together with a tetra-n-butyl orthosilicate as the silica source in order to apply it as a gas adsorbent. According to the X-ray diffraction patterns, all peaks were assigned to the hydroxyapatite. No secondary phases, such as calcium hydroxide and silicon oxides, were observed. Moreover, the transmission electron microscope observations indicated that the crystallite size hardly changed by increasing the silicon oxide content. However, the adsorption areas of nitrogen, water and benzene were remarkably dependent on the silicon oxide content. In this paper, in order to explain the change in the adsorption areas, the lattice structure of the silica-hybridized hydroxyapatite is discussed based on the results obtained by the 29Si and 31P magic angle spinning-nuclear magnetic resonance spectroscopy (MAS-NMR).

Original languageEnglish
Pages (from-to)769-773
Number of pages5
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume114
Issue number1333
DOIs
Publication statusPublished - 2006

Fingerprint

Gas adsorption
Silicon oxides
Durapatite
silicon oxides
Hydroxyapatite
Silicon Dioxide
Calcium Hydroxide
Hydrated lime
Silica
silicon dioxide
hydroxides
adsorption
calcium
synthesis
gases
Adsorption
Magic angle spinning
phosphoric acid
magnetic resonance spectroscopy
Phosphoric acid

Keywords

  • Si MAS-NMR
  • P MAS-NMR
  • Adsorption
  • Hydroxyapatite
  • Silica

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Synthesis and structural characterization of silica-hybridized hydroxyapatite with gas adsorption capability. / Fujii, Eiji; Kawabata, Koji; Ando, Kanae; Tsuru, Kanji; Hayakawa, Satoshi; Osaka, Akiyoshi.

In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Vol. 114, No. 1333, 2006, p. 769-773.

Research output: Contribution to journalArticle

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AU - Fujii, Eiji

AU - Kawabata, Koji

AU - Ando, Kanae

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AU - Hayakawa, Satoshi

AU - Osaka, Akiyoshi

PY - 2006

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AB - Silica-hybridized hydroxyapatite powder was prepared from a calcium hydroxide and phosphoric acid together with a tetra-n-butyl orthosilicate as the silica source in order to apply it as a gas adsorbent. According to the X-ray diffraction patterns, all peaks were assigned to the hydroxyapatite. No secondary phases, such as calcium hydroxide and silicon oxides, were observed. Moreover, the transmission electron microscope observations indicated that the crystallite size hardly changed by increasing the silicon oxide content. However, the adsorption areas of nitrogen, water and benzene were remarkably dependent on the silicon oxide content. In this paper, in order to explain the change in the adsorption areas, the lattice structure of the silica-hybridized hydroxyapatite is discussed based on the results obtained by the 29Si and 31P magic angle spinning-nuclear magnetic resonance spectroscopy (MAS-NMR).

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