Abstract
A series of titania-silica mixed oxides were prepared by co-precipitation and sol-gel methods. The mole fraction of titanium was varied from 0 to 1. The effects of preparation method and chemical composition on the physical properties and acidity profiles of mixed oxides were examined. While pure silica was non-acidic and titania contained only Lewis acid sites, Brønsted acidity was created by the Ti-O-Si interaction in the binary oxides. Samples containing a titania: silica mole ratio of 9 ∶ 1 possessed the largest amount of Brønsted acidity. The generation of acid sites and the stability of the oxide was a strong function of preparation method. With all preparation methods, higher calcination temperatures increased crystallinity and decreased the total number of acid sites.
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K. Tanabe, in:New Solid Acids and Bases, Vol. 51, eds. K. Tanabe, M. Misono, Y. Ono and H. Hattori (Kodansha/Elsevier, Tokyo/Amsterdam, 1989) ch. 3.
K. Tanabe, in:Catalysis by Acids and Bases, eds. B. Imelik, C. Naccache, G. Coudurier, Y. Ben Taarit and J.C. Vedrine (Elsevier, Amsterdam, 1985).
H.A. Benesi, J. Am. Chem. Soc. 78 (1956); J. Phys. Chem. 61 (1957) 970.
J. Ward and R.C. Hansford, J. Catal. 13 (1969) 354.
J.W. Hightower and W.K. Hall, J. Am. Chem. Soc. 89 (1967) 7778.
P. County and C. Marcilly, in:Preparation of Catalysts III (Elsevier, Amsterdam, 1983) p. 485.
K. Tanaka and A. Ozaki, J. Catal. 8 (1967) 2.
E.I. Ko, J.P. Chen and J.G. Weissman, J. Catal. 105 (1987) 511.
M.P. McDaniel and M.B. Welsh, J. Catal. 82 (1983) 98.
S. Yoshida, U. Ueda and K. Tarama, Ind. Eng. Chem. Prod. Res. Dev. 21 (1982) 424.
M. Inomata, A. Miyamoto, T. Ui, K. Kobayashi and Y. Murakami, Ind. Eng. Chem. Prod. Res. Dev. 21 (1982) 424.
K. Tanabe, T. Sumiyoshi, K. Shibata, T. Kiyoura and J. Kitagawa, Bull. Chem. Soc. Japan 47 (1974) 1064.
T. Seiyama,Metal Oxides and their Catalytic Actions (Kodansha, Tokyo, 1978).
H.H. Kung, J. Solid State Chem. 52 (1984) 191.
M. Itoh, H. Hattori and K. Tanabe, J. Catal. 35 (1974) 225.
B.E. Handy, A. Baiker, M. Schraml-Marth and A. Wokaun, J. Catal. 133 (1992) 1.
K.L. Walther, A. Wokaun, B.E. Handy and A. Baiker, J. Non-Cryst. Sol. 134 (1991) 47.
T. Kataoka and J.A. Dumesic, J. Catal. 112 (1988) 66.
D. Chen, S. Sharma, N. Cardona-Martinez, J.A. Dumesic, V.A. Bell, G.D. Hodge and R.J. Madon, J. Catal. 136 (1992) 392.
J.J. Venter and M.A. Vannice, Appl. Spectry. 42 (1988) 1096.
A.Yu. Stakheev, E.S. Shapiro and J. Apijok, J. Phys. Chem. 97 (1993) 5668.
S.J. DeCanio, J.R. Sohn, P.O. Fritz and J.H. Lunsford, J. Catal. 101 (1986) 132.
C.U.I. Odenbrand, J.G.M. Brandin and G. Busca, J. Catal. 135 (1992) 505.
C.U.I. Odenbrand, S.L.T. Andersson, L.A.H. Andersson, J.G.M. Brandin and G. Busca, J. Catal. 125 (1990) 541.
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Doolin, P.K., Alerasool, S., Zalewski, D.J. et al. Acidity studies of titania-silica mixed oxides. Catal Lett 25, 209–223 (1994). https://doi.org/10.1007/BF00816302
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DOI: https://doi.org/10.1007/BF00816302