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纳米粒子在乙醇悬浮中的表征使用单颗粒感应合等离子体质谱学:用于水泥系统的应用

Steffen Hellmann^1,2, Teba Gil-Díaz¹, Marcus Böhm¹

¹Friedrich Schiller University Jena, Institute of Geosciences, Applied Geology, Burgweg 11, 07749 Jena, Germany.

|July 22, 2024

概括

一种新的单颗粒感应合等离子体质谱法 (spICP-MS) 方法分析酒精中的纳米粒子. 这项技术准确量化了水泥中的-酸盐-水合物纳米颗粒,这对于材料强度至关重要.

科学领域:

纳米材料的特性表征
分析化学是一种分析化学.
材料科学是一种材料科学.

背景情况:

单颗粒感应合等离子体质谱 (spICP-MS) 已建立用于水性纳米粒子分析.
分析酒精悬浮中的水敏感或反应性纳米颗粒仍然是一个挑战.
-酸盐-酸盐 (C-S-H) 纳米粒子是水泥强度的关键,但很难在乙醇中分析.

研究的目的:

开发和验证一种新的spICP-MS方法来表征乙醇悬浮中的纳米粒子.
分析-酸盐-酸盐 (C-S-H) 纳米颗粒,这是一个主要的水化水泥产品.
评估该方法对各种纳米粒子组成和尺寸的适用性,包括工业材料.

主要方法:

开发一个spICP-MS协议,用于分析乙醇溶液中的纳米粒子.
用经过认证的参考材料 (Au,SiO2,Fe3O4纳米粒子) 和合成C-S-H相测试该方法.
通过与纳米粒子跟踪分析 (NTA) 和传输/扫描电子显微镜 (TEM/SEM) 的比较进行验证.

主要成果:

spICP-MS提供了与TEM和NTA相似的尺寸分布,用于纳米颗粒≥51nm.
颗粒数度 (PNC) 在CRM和C-S-H阶段的高精度验证.
使用spICP-MS进行的元素分析 (Ca/Si比) 准确地反映了已知的合成C-S-H相的组成.

结论:

新的spICP-MS方法可以直接量化酒精悬浮中的纳米颗粒.
该技术适用于表征C-S-H纳米粒子和其他与水泥水化相关的反应性纳米材料.
这一进步有助于研究非水性介质中的快速核和矿物形成过程.

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