Abstract
Thermally stable mesoporous aluminophosphates (AIPO) and silicoaluminophosphates (SAPO) were prepared at room temperature in the presence of a cationic surfactant and an organic base. These materials possess high surface areas and regular mesopores of approximately 35 Å diameter. By contrast to microporous crystalline aluminophosphate molecular sieves, mesoporous compounds are amorphous and characterized by Al/P ratios greater than 1. These particularities are responsible for a strong Lewis acidity, as evidenced by ammonia adsorption microcalorimetry. Mesoporous materials are more acidic than the microporous analogues and the amount of strong acid sites increases with the silicon content.
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J. S. Beck, J. C. Vartuli, W. J. Roth, M. E. Leonowicz, C. T. Kresge, K. D. Schmitt, C. T. W. Chu, D. H. Olson, E. W. Sheppard, S. B. McCullen, J. B. Higgins and J. L. Schlenker, J. Am. Chem. Soc., 114 (1992) 10834.
Q. Huo, D. I. Margolese, U. Ciesla, D. G. Demuth, P. Feng, T. E. Gier, P. Sieger, A. Firouzi, B. F. Chmelka, F. Schüth and G. D. Stucky, Chem. Mater., 6 (1994) 1176.
J. A. Knowles and M. J. Hudson, J. Chem. Soc., Chem. Commun., (1995) 2083.
D. M. Antonelli and J. Y. Ying, Angew. Chem. Int. Ed. Engl., 34 (1995) 2014.
S. Oliver, A. Kuperman, N. Coombs, A. Louth and G. A. Ozin, Nature, 378 (1995) 47.
A. Sayari, V. R. Karra, J. S. Reddy and I. L. Moudrakovski, J. Chem. Soc., Chem. Commun., (1996) 411.
D. Zhao, Z. Luan and L. Kevan, J. Chem. Soc., Chem. Commun., (1997) 1009.
B. Chakraborty, A. C. Pulikottil, S. Das and B. Viswanathan, J. Chem. Soc., Chem. Commun., (1997) 911.
Z. Luan, D. Zhao, H. He, J. Klinowski and L. Kevan, J. Phys. Chem. B, 102 (1998) 1250.
A. Auroux, Topics in Catalysis, 4 (1997) 71.
J. Jänchen, H. Stach, M. Busio, and J. H. M. C. van Wolput. Thermochim. Acta, 312 (1998) 33.
H. Kosslick, H. Landmesser and R. Fricke, J. Chem. Soc., Faraday Trans., 93 (1997) 1849.
M. L. Occelli, S. Biz, A. Auroux and G. J. Ray, to be published in Microporous and Mesoporous Materials, 26 (1998) 193.
H. Stach, I. Girnus, J. Jänchen, E. Loffler, U. Lohse, B. Parlitz and B. Zibrowius, Proc. 9th IZC, Eds. R. von Ballmoos et al., 1993, RP 142, Butterworth-Heinemann, Montreal 1992.
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d'Arbonneau, S., Tuel, A. & Auroux, A. Calorimetric Study of the Acidity of a New Family of Mesoporous Catalysts. Journal of Thermal Analysis and Calorimetry 56, 287–296 (1999). https://doi.org/10.1023/A:1010126012231
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DOI: https://doi.org/10.1023/A:1010126012231