在高沸的溶剂中"液相化"的合性半孔性二氧化纳米粒子
Valentina Cauda1, Christian Argyo, Davin G Piercey
1Department of Chemistry and Center for NanoScience (CeNS), University of Munich (LMU), Butenandtstrasse 5-13 (E), 81377 Munich, Germany.
Journal of the American Chemical Society
|April 13, 2011
概括
使用TOPO,TOA和烯的新型液体化方法有效地加强 colloidal mesoporous silica (CMS) 纳米颗粒中的二氧化网络. 这种方法可以防止聚合,保持合体稳定性和中孔性质.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 化学 化学 化学
背景情况:
- 合性半孔 (CMS) 纳米颗粒是有价值的,但在传统的空气化过程中容易聚集.
- 聚合防止它们在合物悬浮中使用,限制了应用.
研究的目的:
- 为CMS纳米粒子开发一种新的液相化方法.
- 为了改善二氧化网络的凝结,并保持合体稳定性.
- 为了消除对单独模板删除步骤的需求.
主要方法:
- 使用高温液相化,使用三酸氧化物 (TOPO),三-n-octylamine (TOA) 和烯.
- 在275°C的TOPO中研究了热化.
- 评估模板去除和二氧化凝结效率.
主要成果:
- 使用TOPO在275°C时,在模板去除和网络强化方面实现了高效率.
- 保存了CMS纳米颗粒的有序半层结构,高孔状性和大表面积.
- 经过处理的CMS纳米颗粒的高合稳定性,防止聚合.
结论:
- 液体化是一种强大而通用的方法,用于制备稳定的合体多孔纳米粒子.
- 基于TOPO的液体化方法增强了二氧化的凝结,并保持了合体稳定性.
- 这种技术提供了更高效的准备强大的半孔性二氧化纳米颗粒.
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