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.
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Rao, G.R., Mishra, B.G. Mixed Al/Ce oxide pillaring of montmorillonite: XRD and UV-VIS diffuse reflectance study. Reaction Kinetics and Catalysis Letters 75, 251–258 (2002). https://doi.org/10.1023/A:1015242827924
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DOI: https://doi.org/10.1023/A:1015242827924