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首页> 外文期刊>Journal of Materials Science >Ultrastructure characterization of hydroxyapatite nanoparticles synthesized by EDTA-assisted hydrothermal method
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Ultrastructure characterization of hydroxyapatite nanoparticles synthesized by EDTA-assisted hydrothermal method

机译：EDTA辅助水热法合成羟基磷灰石纳米粒子的超微结构表征

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All the reagents were of analytical grade and used without further purification. In a typical procedure, 50 mL of a mixed solution of Ca(NO3)2 4H2O (0.5 M) and EDTA (0.1 M) was first prepared and then added dropwise into 50 mL of Na2HPO4 (0.3 M) under intense stirring. The initial pHof the mixed solution of Ca(NO3)2 4H2O and EDTA was measured to be 11.5. After mixing with Na2HPO4, the pH of the new mixed solution was adjusted to 9 by adding NaOH solution, and then, the mixed solution was magnetically stirred on a hotplate (60 STXC) for 2 h. After that, the mixed solution was kept in Teflon flasks and sealed tightly for hydrothermal reactions. The flasks were hold in oven at 120 STXC or 180 STXC for 12 h. After hydrothermal processing, white HA precipitates were filtered, washed thoroughly with deionized water, and oven-dried at 50 STXC for 24 h.
机译：所有试剂均为分析纯，无需进一步纯化即可使用。在典型程序中，首先制备50 mL Ca（NO3）2 4H2O（0.5 M）和EDTA（0.1 M）的混合溶液，然后在剧烈搅拌下滴加到50 mL Na2HPO4（0.3 M）中。 Ca（NO3）2 4H2O和EDTA混合溶液的初始pH值测量为11.5。与Na2HPO4混合后，通过添加NaOH溶液将新混合溶液的pH值调节至9，然后将混合溶液在电热板（60 STXC）上磁力搅拌2 h。之后，将混合溶液保持在特氟隆烧瓶中并密封以进行水热反应。将烧瓶在120 STXC或180 STXC的烘箱中保持12小时。水热处理后，将白色HA沉淀物过滤，用去离子水彻底洗涤，并在50 STXC烘箱中干燥24小时。

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