八角石
材料科学
催化作用
沸石
化学工程
吸附
热稳定性
微型多孔材料
纳米技术
粒径
有机化学
化学
复合材料
工程类
作者
Hussein Awala,Jean‐Pierre Gilson,R. Retoux,Philippe Boullay,Jean‐Michel Goupil,Valentin Valtchev,Svetlana Mintova
出处
期刊:Nature Materials
[Springer Nature]
日期:2015-01-05
卷期号:14 (4): 447-451
被引量:362
摘要
Nanosized faujasite (FAU) crystals have great potential as catalysts or adsorbents to more efficiently process present and forthcoming synthetic and renewable feedstocks in oil refining, petrochemistry and fine chemistry. Here, we report the rational design of template-free nanosized FAU zeolites with exceptional properties, including extremely small crystallites (10-15 nm) with a narrow particle size distribution, high crystalline yields (above 80%), micropore volumes (0.30 cm(3) g(-1)) comparable to their conventional counterparts (micrometre-sized crystals), Si/Al ratios adjustable between 1.1 and 2.1 (zeolites X or Y) and excellent thermal stability leading to superior catalytic performance in the dealkylation of a bulky molecule, 1,3,5-triisopropylbenzene, probing sites mostly located on the external surface of the nanosized crystals. Another important feature is their excellent colloidal stability, which facilitates a uniform dispersion on supports for applications in catalysis, sorption and thin-to-thick coatings.
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