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Mixed Al/Ce oxide pillaring of montmorillonite: XRD and UV-VIS diffuse reflectance study
Published in
2002
Volume: 75
   
Issue: 2
Pages: 251 - 258
Abstract
Ce and Al pillared clays were prepared by (i) pillaring Ce3+-exchanged montmorillonite with Al13 polycation (Ce-Al-PILC) and (ii) by pillaring Na-montmorillonite with an oligomer obtained from cohydrolysis of Ce3+ and Al3+ salts (Al-Ce-PILC). Cohydrolyzed oligomer gives larger intercalating species with Ce3+ incorporated in it. The UV-DRS spectrum of clay sample intercalated with this species shows four distinct absorption bands at 224, 263, 294 and 342 nm, which are attributed to the 4f-5d interconfigurational transitions of Ce3+ ions associated with alumina pillars.
About the journal
JournalReaction Kinetics and Catalysis Letters
ISSN01331736
Open AccessNo
Concepts (15)
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    Aluminum compounds
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    CERIUM COMPOUNDS
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    Electron transitions
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    Hydrolysis
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    Ion exchange
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    Oligomers
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    Ultraviolet spectroscopy
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    X ray diffraction analysis
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    ABSORPTION BANDS
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    ALUMINA PILLARS
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    COHYDROLYSIS
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    INTERCONFIGURATIONAL TRANSITIONS
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    Montmorillonite
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    ULTRAVIOLET-VIS DIFFUSE REFLECTANCE STUDY
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    Clay