Synthesis of borosilicalite-1 with more than four boron per unit cell from fluoride containing media

Autor: Antonio Fonseca, J. L. Guth, Guy Demortier, Rosario Aiello, L. Delmotte, Rosaria Chiappetta, Janos B. Nagy, F. Testa, Fortunato Crea, J. C. Bertrand

Publikováno v: Journal of Porous Materials. 14:191-204

More than four boron per unit cell has been introduced into the framework of silicalite-1, using fluorine containing media. The initial gels were of composition 9MF–xH3BO3–10SiO2–1.25TPABr–330 H2O with M = NH4, Na, K and Cs and x = 0.1–10.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d6fe900f371d29a2d4da8d4e1042f097
https://doi.org/10.1007/s10934-006-9024-z

Synthesis of borosilicalite-1 with high boron content from fluoride-containing media

Autor: Rosaria Chiappetta, Fortunato Crea, Antonio Fonseca, Janos B. Nagy, Rosario Aiello, Flaviano Testa

Publikováno v: Colloids and Surfaces A: Physicochemical and Engineering Aspects. 115:223-227

The synthesis of borosilicalite-1 in fluoride-containing media can lead to a number of boron atoms per unit cell of higher than four, the maximum amount obtained in alkaline media. The preferential countercations to negative charges linked to framewo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4c225e425a0cbfdb5c48806cef161eca
https://doi.org/10.1016/0927-7757(96)03670-9

Different processes for the preparation of fluorozirconate glasses

Autor: Rosaria Chiappetta, Marco Braglia, Monica Ferraris, Eros Modone, Giuseppe Cocito

Publikováno v: Materials Research Bulletin. 25:891-897

Different processes for the preparation of fluorozirconate glasses (ZBLAN) have been investigated by infrared spectroscopy (IR) and x-ray diffraction (XRD) on fluoride powders, during the reaction. Glasses have been prepared with 20-10-5-0 (% weight)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97ce2c0ad4ab9e5bc9ac4eb2e26aaaaa
https://doi.org/10.1016/0025-5408(90)90067-c

Ammonia interaction and reaction with Al-pillared montmorillonite: an IR study

Autor: Barbara Onida, Rosaria Chiappetta, Silvia Bodoardo, François Figueras, Edoardo Garrone

Publikováno v: Microporous and Mesoporous Materials
Microporous and Mesoporous Materials, Elsevier, 1998, 20, pp.187-196
Scopus-Elsevier
CIÊNCIAVITAE

Interaction of ammonia (both as NH 3 and ND 3 ) with plain and Al 13 -pillared montmorillonite has been studied by means of IR spectroscopy. Up to seven types of hydroxyls have been identified on the basis of their behaviour, for which a tentative na

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61ac7f0369468c97b27463d5dc8b7b1e
http://hdl.handle.net/11583/1651418

ASSESSMENT OF BROENSTED ACIDITY IN ZEOLITES BY CO ADSORPTION: AN IR STUDY

Autor: Piero Ugliengo, Rosaria Chiappetta, G. Spoto, F. Fajula, Edoardo Garrone, A. Zecchina

IR data concerning CO adsorption at 77 K have been used to characterize the various hydroxys of some zeolites in protonic form: ZSM5, TON, MOR (as such and dealuminated), dealuminated MAZ. CO-complexing occurs via the C end and shows features typical

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::af9071d7aa70d5320cefd326d109bb94
https://doi.org/10.1016/b978-1-4832-8383-8.50117-3