Journal
JOURNAL OF CATALYSIS
Volume 194, Issue 2, Pages 487-490Publisher
ACADEMIC PRESS INC
DOI: 10.1006/jcat.2000.2946
Keywords
UV resonance Raman; iron; isomorphous substitution; silicalite-1; MFI-type zeolites; Fe-ZSM-5; electron spin resonance (ESR); UV/visible diffuse reflectance (UV/Vis DRS)
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Silicalite-I, ZSM-5, and Fe-ZSM-5 zeolites prepared from two different silicon sources are characterized by UV resonance Raman (UVRR) spectroscopy, X-ray diffraction (XRD), electron spin resonance (ESR), and UV/visible diffuse reflectance spectroscopy (UV/Vis DRS). A new technique for investigating zeolitic structure, UV resonance Raman spectroscopy selectively enhances the Raman bands associated with framework iron atoms incorporated into MFI-type zeolites, and it is very sensitive in identifying the iron atoms in the framework of zeolites, while other techniques such as XRD, ESR, and UV/Vis DRS have failed in uncovering trace amounts of iron atoms in the framework of zeolites. (C) 2000 Academic Press.
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