Synthesis and characterization of Ti(IV)-substituted calcium hydroxyapatite particles by forced hydrolysis of Ca(OH)2-Na5P3O10-TiC
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- 作者：Kazuhiko Kandori (1)
Minori Mitsui (1) - 关键词：Calcium hydroxyapatite ; Ti(IV) ; substituted calcium hydroxyapatite (TiHap) particles ; Forced hydrolysis of triphosphate
- 刊名：Colloid & Polymer Science
- 出版年：2014
- 出版时间：November 2014
- 年：2014
- 卷：292
- 期：11
- 页码：2849-2856
- 全文大小：1,368 KB
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文摘
Ti(IV)-substituted calcium hydroxyapatite (TiHap) particles were prepared by aging Ca(OH)2, TiCl4, and sodium triphosphate (sodium tripolyphosphate, Natpp: Na5P3O10) mixed solution at 100?°C for 18?h. The ellipsoidal secondary TiHap particles with ca. 100?50?nm in length composing by aggregation of small ellipsoidal primary particles with ca. 20?nm in length were produced at atomic ratio of Ti/(Ca+Ti) [XTi]?.2. The in situ IR spectra of these TiHap particles exhibited very small bulk OH?/sup> band at 3,570?cm?. This result indicated that the TiHap particles were formed by aggregation of fine primary particles and OH?/sup> ions along with c-axis in the primary particles were disordered. The TiHap particles with Ca/P atomic ratio larger than theoretical value of 1.67 did not exhibit surface P–OH groups at 3,659 and 3,682?cm?. The diffuse reflectance UV spectra of TiHap particles revealed that these particles have a UV absorption property, especially fabricated at XTi--.1. The particles prepared at XTi--.6 and 0.8 were amorphous and nanoparticles with 5?0?nm in diameter, but those precipitated at XTi--.0 were poorly crystallized anataze-type TiO2 nanoparticles.