Preparation and Structure of Zinc–Calcium Hydroxyapatite Solid Solution Particles and Their Ultraviolet Absorptive Ability

IF 2.5 Q3 CHEMISTRY, PHYSICAL
Akemi Yasukawa, Minami Yamada
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Abstract

The calcium ions (Ca2+) of calcium hydroxyapatite (CaHap) were substituted with zinc ions (Zn2+), and zinc–calcium hydroxyapatite solid solution (ZnCaHap) particles were prepared via a precipitation method. The structure of the various obtained particles was investigated via powder X-ray diffraction, field emission scanning electron microscopy and energy dispersive X-ray spectrometry. The ultraviolet (UV) absorption ability of the particles was also investigated using UV–Vis spectroscopy. The morphology of the CaHap comprised fine ellipsoidal particles, and long rod-like particles and large plate-like particles were mixed with the fine particles at higher Zn2+ contents in the particles. Pure ZnCaHap particles were obtained from the starting solution at less than Zn/(Zn + Ca) ([XZn]) of 0.25. Another crystal phase was mixed with the ZnCaHap phase at [XZn] ≥ 0.25. The crystallinity and lattice parameters a and c of the particles decreased with an increase in [XZn] from 0 to 0.10. The UV absorptive ability of the particles first increased and then decreased with increasing Zn2+ content and showed a maximum at [XZn] = 0.30.
羟基磷灰石锌钙固溶体颗粒的制备、结构及其紫外线吸收能力
用锌离子(Zn2+)取代羟基磷灰石钙(CaHap)中的钙离子(Ca2+),通过沉淀法制备了锌钙羟基磷灰石固溶体(ZnCaHap)颗粒。通过粉末 X 射线衍射、场发射扫描电子显微镜和能量色散 X 射线光谱法研究了所获得的各种颗粒的结构。此外,还使用紫外可见光谱法研究了颗粒的紫外线(UV)吸收能力。CaHap 的形态由细小的椭圆形颗粒组成,当颗粒中 Zn2+ 含量较高时,细小颗粒中会混入长杆状颗粒和大板状颗粒。从 Zn/(Zn + Ca) ([XZn]) 小于 0.25 的起始溶液中获得了纯 ZnCaHap 颗粒。在[XZn]≥0.25 时,另一种晶相与 ZnCaHap 相混合。颗粒的结晶度和晶格参数 a 和 c 随 [XZn] 从 0 到 0.10 的增加而降低。随着 Zn2+ 含量的增加,颗粒的紫外线吸收能力先增大后减小,在 [XZn] = 0.30 时达到最大值。
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来源期刊
Colloids and Interfaces
Colloids and Interfaces CHEMISTRY, PHYSICAL-
CiteScore
3.90
自引率
4.20%
发文量
64
审稿时长
10 weeks
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