Gallium, Aluminum and Mixed Gallium Aluminum Pillared Montmorillonite - Preparation and Characterization
(1991) Applied Catalysis A: General — Vol. 77, n° 2, p. 303-314 (1991)
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- Abstract
- Pillaring of montmorillonite was achieved with partially hydrolysed solutions of gallium, gallium-aluminium and aluminium. The development of 18 angstrom spcacings was investigated in relation with the OH/M3+ molar ratio, the amount of pillaring solution and the molar composition of the mixed solutions. With respect to Al-pillared clays, Ga- and Ga-Al-pillared montmorillonites exhibit similar behaviour toward heat treatment. They also have similar specific surface areas and pore volumes. IR spectroscopy of adsorbed pyridine show that both Bronsted and Lewis acidities are present, the former being slightly less developed in the Ga-pillared sample than in the aluminium analogue.
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Coelho, AV., & Poncelet, G. (1991). Gallium, Aluminum and Mixed Gallium Aluminum Pillared Montmorillonite - Preparation and Characterization. Applied Catalysis A: General, 77(2), 303-314. https://doi.org/10.1016/0166-9834(91)80073-6 (Original work published 1991)