Surface structure and composition of calcium hydroxyapatites substituted with Al(III), La(III) and Fe(III) ions

被引：101

作者：

Wakamura, M ^{[1
]}

Kandori, K ^{[1
]}

Ishikawa, T ^{[1
]}

机构：

[1] Osaka Univ Educ, Sch Chem, Osaka 5828582, Japan

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2000年 / 164卷 / 2-3期

关键词：

calcium hydroxyapatite; ion-exchange; surface modification; surface characterization; coprecipitation;

D O I：

10.1016/S0927-7757(99)00384-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Synthetic calcium hydroxyapatite (CaHap) particles were modified by ion-exchange with Al(III), La(III) and Fe(III) by the coprecipitation and immersion methods. The growth of CaHap particles was observed on substituting with these metal ions by coprecipitation. The exchange ratios of Ca(II) with the metal ions revealed that Fe(III) replaces Ca(II) as hydroxo ions and the substitution with La(III) accompanies OH--deficiency. In the substitution with immersion the exchange ratios for all the metal ions were less than 1.5 of the theoretical ratio, verifying the exchange with metal hydroxo ions. IR spectra of the CaHap particles substituted with Al(III) by both the methods gave rise to several bands due to surface Al-OH besides the surface P-OH bands, whereas the CaHap substituted with La(III) showed no surface La-OH band. The surface Fe-OH was found on the CaHaps substituted by the coprecipitation but not on those substituted by the immersion. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：297 / 305

页数：9

共 25 条

[1] EFFECTS OF ALUMINUM(III), CHROMIUM(III), AND IRON(III) ON THE RATE OF DISSOLUTION OF CALCIUM HYDROXYAPATITE CRYSTALS IN THE ABSENCE AND PRESENCE OF THE CHELATING AGENT DESFERRIOXAMINE [J].