Hexagonal and cubic thermally stable mesoporous Tin(IV) phosphates with acidic, basic and catalytic properties
Capitolo
Data di Pubblicazione:
2002
Citazione:
Hexagonal and cubic thermally stable mesoporous Tin(IV) phosphates with acidic, basic and catalytic properties / C. Serre, A. Auroux, A. Gervasini, M. Hervieu, G. Ferey - In: Studies in Surface Science and Catalysis, Impact of Zeolites and Other Porous Materials on the New Technologies at the Beginning of the New Millennium, Vol. 142(B), / [a cura di] R. Aiello, G. Giordano, F. Testa,. - Amsterdam : Elsevier, 2002. - ISBN 0-444-51174-1. - pp. 1091-1099 (( convegno 2nd International Conference of the Federation-of-European-Zeolite-Associations tenutosi a TAORMINA, ITALY nel SEP 01-05, 2002.
Abstract:
Thermally stable hexagonal and cubic mesoporous tin(IV) phosphates have been synthesised via a fluoride route using alkyl di- or tri- methylammonium bromide surfactants. X-ray powder diffraction and HREM show that the hexagonal phase exhibits a MCM-41 organisation while the structure of cubic phase is similar to those of the micellar cubic solid SBA-1. Removal of the surfactant by calcination under air atmosphere of both phases does not destabilise the framework and leads to mesoporous solids exhibiting surface area within the 200-630 m2/g range and pore sizes between 12 and 25 Å. Finally, microcalorimetric studies of the adsorption of NH3 and SO2, indicated that both solids exhibit both a strong acidic and a weak basic character. First de-NOx catalytic tests have also shown positive results for both solids, which indicates that these porous solids represent an interesting family of materials with good catalytic properties.
Tipologia IRIS:
03 - Contributo in volume
Elenco autori:
C. Serre, A. Auroux, A. Gervasini, M. Hervieu, G. Ferey
Link alla scheda completa:
Titolo del libro:
Studies in Surface Science and Catalysis, Impact of Zeolites and Other Porous Materials on the New Technologies at the Beginning of the New Millennium, Vol. 142(B),