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Titolo:
Incorporation of magnesium in mesostructured and mesoporous aluminophosphates
Autore:
Khimyak, YZ; Klinowski, J;
Indirizzi:
Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England Univ Cambridge Cambridge England CB2 1EW hem, Cambridge CB2 1EW, England
Titolo Testata:
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
fascicolo: 8, volume: 3, anno: 2001,
pagine: 1544 - 1551
SICI:
1463-9076(2001)3:8<1544:IOMIMA>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRANSITION-METAL IONS; MOLECULAR-SIEVES; PORE-SIZE; MICROCRYSTAL DIFFRACTION; CATALYTIC PROPERTIES; CRYSTAL-STRUCTURE; COBALT PHOSPHATE; FRAMEWORK; NMR; SUBSTITUTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Khimyak, YZ Univ Cambridge, Dept Chem, Lensfield Rd, Cambridge CB2 1EW, England Univ Cambridge Lensfield Rd Cambridge England CB2 1EW England
Citazione:
Y.Z. Khimyak e J. Klinowski, "Incorporation of magnesium in mesostructured and mesoporous aluminophosphates", PHYS CHEM P, 3(8), 2001, pp. 1544-1551

Abstract

Mesostructured and mesoporous MgAPOs and MgAPSOs were synthesised using cationic templating in the presence of various relative amounts of Mg2+ and the silica source. The products were characterised by X-ray diffraction, Al-27, P-31 and Si-29 solid-state NMR, thermal and elemental analyses and nitrogen adsorption. Magnesium is incorporated into the structure substituting for either the Al3+ units or the surfactant cations, with a consequent decrease of mesoscopic ordering. Incorporation of large amounts of magnesium ineither mesostructured AlPO or SAPO gives products with significantly larger pore diameters than those of MgAPO and MgAPSO with lower Mg content, or AlPO or SAPO made using the same P2O5:Al2O3 ratio. Introduction of Si into the framework leads to an increased degree of condensation of the inorganic framework, and improves the thermal stability of the products.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 17:56:28