通过粒子附着和确定性途径控制晶体大小的SSZ-13结晶
Manjesh Kumar1, Helen Luo2, Yuriy Román-Leshkov2
1Chemical and Biomolecular Engineering, University of Houston , Houston, Texas 77204, United States.
Journal of the American Chemical Society
|September 17, 2015
概括
石晶体通过非古典和古典的两种途径生长. 聚合物可以精确控制晶体大小,形状和多孔性,以改善催化和分离中的应用.
科学领域:
- 材料科学
- 结晶科学
- 纳米技术
背景情况:
- 晶体材料通常通过涉及前体自组合的非经典途径生长.
- 了解前体的附着和重新排列对于控制晶体生长至关重要.
- 酸是一种酸,在催化和分离中具有重要的应用.
研究的目的:
- 为了阐明SSZ-13的结晶机制
- 开发一种定制SSZ-13晶体属性的方法.
- 探索SSZ-13增长洞察的广泛应用.
主要方法:
- 研究了SSZ-13的结晶机制.
- 使用增长修饰剂 (聚合物) 来控制前体聚合和附着.
- 分析了晶体大小,形态和多孔性的变化.
主要成果:
- SSZ-13表现出双重生长机制:非经典的 (无形粒子附着) 和经典的 (层层的).
- 聚合物有效调解SSZ-13的生长,使其能够控制晶体大小 (0.1-20μm),形状和中等度.
- 建立了一个商业上可行的方法来定制SSZ-13属性.
结论:
- SSZ-13的双增长机制提供了对石结晶的基本见解.
- 通过分子设计定制SSZ-13的物理特性为其应用提供了新的优化途径.
- 关于SSZ-13生长的发现可能适用于其他微孔晶体材料.
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