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从溶液中探索兰他 (III) 和 (III) 氧化的结晶
Villads R M Nielsen1, Olivia Aalling-Frederiksen1, Kirsten M Ø Jensen1
1Department of Chemistry and Nanoscience Centre, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark.
Inorganic chemistry
|April 7, 2025
概括
兰化的结晶发生在凝颗粒中,而不是溶液中. 水热处理有助于凝脱水,影响最终的晶体结构和形态.
科学领域:
- 材料科学 材料科学 材料科学
- 无机化学 无机化学 有机化学
- 晶体学 晶体学是指结晶学.
背景情况:
- 了解结晶是材料发现的关键.
- 兰化物 (Lanthanide) 氧化物是重要的材料.
- 复杂的结晶过程需要多种技术的研究.
研究的目的:
- 研究 (III) 和 (III) 氧化物结晶机制.
- 确定pH值和热水处理对氧化结晶的作用.
- 阐明从凝到固体阶段的结晶路径.
主要方法:
- 现场和现场X射线散射 (总X射线散射,对分布函数分析,瑞特维尔德分析)
- 扫描电子显微镜扫描电子显微镜
- 光散射的光散射是一种光散射.
- 的pH值进行定位.
- 模拟是通过模拟进行的.
- 光学光谱学是指光学光谱学.
主要成果:
- 最初的凝阶段在pH值6 ([Ln(NO3) ((OH) ((H2O) ]OH) 和pH值>10 ([Ln(OH) 2 ((H2O) 7) OH) 的情况下形成.
- 凝的脱水产生了Ln(OH) 2(NO3)(H2O) 在pH<10和Ln(OH) 3在pH>10时.
- 在脱水之前的热水处理导致所有pH值的Ln(OH) 3形成.
- 观察到结晶发生在凝颗粒中,而不是溶液中.
结论:
- 兰化的结晶过程通过中间的凝阶段进行.
- 热水处理有助于从凝中去除水分,促进结晶.
- 凝结构被保存,表明粒子内结晶是主要的机制.
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