Organic functionalization of Silicalite-1 nanocrystals by ultrasonic treatment in methanol

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Erscheinungsjahr:
2008
Medientyp:
Text
Schlagworte:
  • Functionalization
  • Silicalite-1
  • Zeolite
  • Ultrasonic treatment
  • Methanol
Beschreibung:
  • Silicalite-1 nanocrystals with organic functional groups were prepared by a simple ultrasonic treatment in methanol. The adsorption of methanol on Silicalite-1 nanocrystals was studied in detail by attenuated total reflection infrared (ATR-IR) spectroscopy, diffuse reflectance fourier transform infrared spectroscopy (DRIFTS), thermogravimetric (TGA) analysis and nitrogen adsorption. The results indicate that methoxy (-OCH3) groups were chemically adsorbed onto the external surface of Silicalite-1 nanocrystals, via terminal silanol groups, which were thermally stable up to 420 °C. The organic functionalization enhanced the hydrophobicity of Silicalite-1 nanocrystals, which has proven to be very useful for fabricating monolayer zeolite films. © 2008 Elsevier Inc. All rights reserved.
Lizenz:
  • info:eu-repo/semantics/closedAccess
Quellsystem:
Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/785936f0-3364-461c-a7b0-ff5e87ac8e17