Title: Chemometric analysis of diffuse reflectance spectra of Co2+-exchanged zeolites: Spectroscopic fingerprinting of coordination environments
Authors: Verberckmoes, AA ×
Weckhuysen, Bert
Schoonheydt, Robert
Ooms, Kristine
Langhans, Ivan #
Issue Date: Aug-1997
Publisher: Elsevier science bv
Series Title: Analytica chimica acta vol:348 issue:1-3 pages:267-272
Abstract: A new method for spectroscopic fingerprinting of the coordination environments of Co2+ in zeolites is proposed and discussed. The method is based on the application of different chemometric techniques (curve fitting, Principal Component Analysis (PCA) and SIMPLe-to-use Interactive Self-Modeling Analysis (SLMPLISMA)) on a series of diffuse reflectance (DR) spectra of Co2+-exchanged zeolites dehydrated at 400 degrees C and 500 degrees C. Two Co2+ species were determined for CoA and assigned to trigonal and pseudo-tetrahedral coordination of Co2+ at the hexagonal windows of six oxygens. Three components were determined for CoX and CoY: two of them are similar to those of zeolite A; the third one is ascribed to pseudooctahedral Co2+ in the hexagonal prisms.
ISSN: 0003-2670
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Surface Chemistry and Catalysis
Chemistry - miscellaneous
Research Center for Operations Research and Business Statistics (ORSTAT), Leuven
× corresponding author
# (joint) last author

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