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- W41354788 abstract "The interaction of α-Ti(PO4)2-2RNH3-H2O (R=C3H7, C4H9) n-alkylamine intercalation compounds with [Al13O4(OH)24(H2O)12]7+ or [A1(H2O)6]3+ ions gives rise to materials with a formula α-Ti [Al (H2O)6]2/3(PO4)2 (A compounds) or α-Ti[Al13O4(OH)24(H2O)12]x(PO4)2(2-7x)RNH3.nH2O (x=0.20, n=8, R=C3H7; x=0.14, n=22, R=C4H9) (B compounds), respectively. Textural analysis of these materials is made by N2/77K and CO2/273K adsorption-desorption isotherms and Hg-porosimetry. The N2-isotherms of A compounds correspond to the type II of BDDT classification without hysteresis loop (SBET ≈ 50 m2g-1). The B compounds (SBET = 160 m2g−1 T=140°C; SBET≈80 m2g−1 T = 600°C) show a N2-isotherms of the type IV with hysteresis loops of the type H3. This materials are non-microporous. The best geometric model of mesopore analysis is the cylindric pore being the value of the pore radius with the higher probability 3 nm. Hg-porosimetry indicates that B materials present a wide zone of porosity between 50 and 200 nm of pore radius. We propose to use the A (ex-propylamine) compound as a reference material for the mesoporosity analysis in lamellar compounds of the α-titanium phosphate type and its derivatives." @default.
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- W41354788 date "1994-01-01" @default.
- W41354788 modified "2023-09-27" @default.
- W41354788 title "Assessment of porosity in materials formed by oligomeric aluminum hydroxides and α-titanium phosphate intercalation compounds" @default.
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- W41354788 doi "https://doi.org/10.1016/s0167-2991(08)63108-0" @default.
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