Preparation of lead hydroxyapatite particles using acetamide

Yasukawa, Akemi; Kunimoto, Takeshi; Kamiuchi, Kaori; Kandori, Kazuhiko; Ishikawa, Tatsuo

doi:10.1039/a900758j

Cited by 22 publications

(12 citation statements)

References 12 publications

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“…In the apatite structure, the Ca ions occupy two types of nonequivalent sites: the M (1) sites are at the fourfold symmetry 4(f) position and the M(2) sites are at the sixfold symmetry 6(h) position [2]. The apatite structure has a high flexibility, so many metal ions can be incorporated into the structure.…”

Section: Introductionmentioning

confidence: 99%

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Crystallographic study of lead-substituted hydroxyapatite synthesized by high-temperature mixing method under hydrothermal conditions

Zhu

Qiu

et al. 2010

Inorganica Chimica Acta

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Abstract:The solid solutions in the system of Ca and Pb hydroxyapatite, Ca 10-χ Pb χ HA (χ= 0-10), were successfully synthesized by high-temperature mixing method (HTMM) at 200ºC for 12 hours under hydrothermal conditions. The samples were characterized by X-ray diffraction, chemical analysis and electron microscopic observation, and the site of the metal ions in the solid solutions was analyzed with the Rietveld method.The lattice parameters of the solid solutions prepared by both of the methods didn't vary linearly with Pb contents, and they have two turning points of 0.4 and 0.6 of Pb content. It was found that Pb ions in the solid solutions preferentially occupied the M (2) site in the apatite structure. HTMM gives Ca-Pb HA solid solutions much better crystallization. However, due to the formation of intermediate compound of

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Section: Introductionmentioning

confidence: 99%

“…The synthetic Ca-HA has attracted our attention for its utility in the fields of bioceramics, catalysts, adsorbents, and so on [1].…”

Section: Introductionmentioning

confidence: 99%

Crystallographic study of lead-substituted hydroxyapatite synthesized by high-temperature mixing method under hydrothermal conditions

Zhu

Qiu

et al. 2010

Inorganica Chimica Acta

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“…The synthetic Ca-HAp has attracted our attention for its utility in the fields of bioceramics, catalysts, adsorbents, and so on [1].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and crystallographic study of Pb–Sr hydroxyapatite solid solutions by high temperature mixing method under hydrothermal conditions

Zhu

Yanagisawa

Shimanouchi

et al. 2009

Materials Research Bulletin

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Abstract:The solid solutions in the system of Pb and Sr hydroxyapatite, Sr 10-x Pb x HAp (x= 0-10), were successfully synthesized by high-temperature mixing method (HTMM) at 160ºC for 12 hours under hydrothermal conditions. The samples were characterized by X-ray diffraction, chemical analysis and electron microscopic observation, and the site of the metal ions in the solid solutions was analyzed with the Rietveld method.The lattice constants, both a and c, of the solid solutions varied linearly with Pb content. It was found that Pb ions in the solid solutions preferentially occupied the M (2) site in the apatite structure. HTMM gives Sr-Pb HAp solid solutions much better crystallization. However, due to the formation of intermediate compound of

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“…Hence, CaHap is widely applied for separating various proteins using as a column for a high-performance liquid chromatograph (HPLC) apparatus and many essential studies have been reported 2,6,8 . The CaHap structure is so tolerant to ionic substitutions, there are many reports of the occupying of Ca sites by various divalent (Ca(II), Mn(II), Mg(II), Sr(II), Cd(II), Pb(II) and Ba(II)) [9][10][11][12][13][14][15][16] , trivalent (Al(III), Fe(III)) 17 and also tetravalent cations (Ti(IV)) 18 . It is also possible to exchange PO4…”

Section: Introductionmentioning

confidence: 99%

SYNTHESIS AND CHARACTERIZATION OF Mn-DOPED CALCIUM HYDROXYAPATITE PARTICLES

Kandori

Yamaguchi

2017

Phosphorus Research Bulletin

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Colloidal manganese (Mn)-doped calcium hydroxyapatites (abbreviated as MnHap) were prepared by the coprecipitation method. The Mn/(Ca+Mn) atomic ratio in the solution (abbreviated as XMn) was varied from 0~0.30. The precipitated particles were characterized by various physicochemical analyses, i.e., TEM, XRD, N2 and H2O adsorptions, TG, FTIR, ICP-AES and XPS measurements. The MnHap particles were produced at 0.01≤XMn≤0.2. The calcium hydroxyapatite produced without Mn ions (XMn=0) was rod-like particles with 23 nm (width) x 55 nm (length). With increase in XMn up to 0.06, the particle width was decreased. The thickness of the rod-like particles produced at XMn≥0.08 was further decreased to ca. 3~5 nm. The spherical nano-particles with ca. 7 nm in diameter precipitated at XMn=0.3 were -TCP and amorphous particles of -MnOOH precursor. The particle color was varied from white to brown, dark-brown and pale-red. The ICP-AES measurement revealed that all the MnHap particles are cation-deficient with XMn values among 1.52~1.63. The lattice constants of c-axis was decreased with increase in XMn at XMn≥0.05 by incorporation of Mn(III) and Mn(IV) ions with smaller atomic radii, 0.072 and 0.053 nm, respectively, instead of Mn(II) ones (0.089 nm). The XPS measurement also revealed that there is no Mn(II) in the MnHap particles but they include both Mn(III) and Mn(IV) ions. The in vacuo IR measurements suggested that the incorporation of Mn ions increased the acidity of surface P-OH groups.

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Preparation of lead hydroxyapatite particles using acetamide

Cited by 22 publications

References 12 publications

Crystallographic study of lead-substituted hydroxyapatite synthesized by high-temperature mixing method under hydrothermal conditions

Crystallographic study of lead-substituted hydroxyapatite synthesized by high-temperature mixing method under hydrothermal conditions

Synthesis and crystallographic study of Pb–Sr hydroxyapatite solid solutions by high temperature mixing method under hydrothermal conditions

SYNTHESIS AND CHARACTERIZATION OF Mn-DOPED CALCIUM HYDROXYAPATITE PARTICLES

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