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2005
Catalysts
H 2000
31- 021
Exfoliated HNb3O8 Nanosheets as a Strong Protonic Solid Acid. — Colloidal
HNb3O8 nanosheets are prepared by exfoliation of layered HNb3O8 by addition of
Bu4NOH to an aqueous solution of the protonated compound. The samples are characterized by SEM and TEM. They function as strong Broensted acid catalysts, exceeding
the activity of Nb2O5·nH2O in the presence of water. The catalytic performance of the
exfoliated sheets is attributed to the formation of bridging hydroxyl groups,
Nb(OH)Nb. — (TAKAGAKI, A.; LU, D.; KONDO, J. N.; HARA, M.; HAYASHI, S.;
DOMEN*, K.; Chem. Mater. 17 (2005) 10, 2487-2489; Dep. Chem. Syst. Eng., Grad.
Sch. Eng., Univ. Tokyo, Bunkyo, Tokyo 113, Japan; Eng.) — W. Pewestorf
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