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Nature of corona in TiO2SBA15-like mesoporous nanocomposite

MPS-Authors
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Jentoft,  Friederike C.
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Venkov,  Tzvetomir V.
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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434419abstract .pdf
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Citation

Perathoner, S., Lanzafame, P., Centi, G., Jentoft, F. C., Venkov, T. V., & Schlögl, R. (2007). Nature of corona in TiO2SBA15-like mesoporous nanocomposite. In R. Xu, Z. Gao, J. Chen, & W. Yan (Eds.), From Zeolites to Porous MOF Materials - The 40th Anniversary of International Zeolite Conference, Proceedings of the 15th International Zeolite Conference (pp. 1788-1795).


Cite as: http://hdl.handle.net/11858/00-001M-0000-0010-FFB6-1
Abstract
TiO2@SBA15-like mesoporous nanocomposite, where the symbol @ indicates inclusion, were prepared by introducing Ti by a grafting technique (TiO2 loadings about 10% wt.) and characterized by different methods. Three different Ti species were evidenced to be present. The first two derive from the reaction of Ti with silanol groups in the corona area of inner SBA15-like walls leading to the formation of either TiO4 tetrahedral sites and/or pseudo-octahedral surface sites anchored by two (or more) Si or Ti ions through bridging oxygen. The third species derives from the reaction of Ti in the regions with high silanol density, e.g. in the micropores located in the corona of SBA15-like channels, leading to the formation of TiO2-like nanoareas with dimensions of around 1 -2 nm and having characteristics different from those of crystalline titania as shown by FTIR data.