Title: | Size-dependent properties of nanocrystalline silicalite synthesized with systematically varied crystal sizes |
Author(s): | Song W; Justice RE; Jones CA; Grassian VH; Larsen SC; |
Address: | "Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, USA" |
ISSN/ISBN: | 0743-7463 (Print) 0743-7463 (Linking) |
Abstract: | "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" |
Notes: | "PubMed-not-MEDLINESong, W Justice, R E Jones, C A Grassian, V H Larsen, S C eng 2005/06/23 Langmuir. 2004 May 25; 20(11):4696-702. doi: 10.1021/la049817m" |