Size-dependent properties of nanocrystalline silicalite synthesized with systematically varied crystal sizes

被引：111

作者：

Song, W ^{[1
]}

Justice, RE ^{[1
]}

Jones, CA ^{[1
]}

Grassian, VH ^{[1
]}

Larsen, SC ^{[1
]}

机构：

[1] Univ Iowa, Dept Chem, Iowa City, IA 52242 USA

来源：

LANGMUIR | 2004年 / 20卷 / 11期

关键词：

D O I：

10.1021/la049817m

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Silicalite-1 powders with crystal sizes ranging from 20 to 1000 nm were synthesized by systematically varying synthesis gel composition, pressure, temperature, and time duration. These samples were characterized by powder X-ray diffraction, scanning electron microscopy, nitrogen adsorption isotherms, solid-state nuclear magnetic resonance, and toluene adsorption. The effect of crystal size on the physical properties of crystals is observed, including a large increase of both total and external surface area when crystal size decreases. The relationship between particle size and external surface area was modeled by assuming a cubic crystal geometry. The nanosized silicalite samples with crystal sizes less than 100 nm have a higher adsorption capacity for toluene, showing promising potential for its application in volatile organic compound removal.

引用

页码：4696 / 4702

页数：7

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