Abstract
Sol-gel titania was phosphated in two different ways: i) “in situ” phosphation using phosphoric acid as hydrolysis catalyst in the titanium butoxide gelling system, and ii) gelling with nitric acid and impregnation with ammonium phosphate solution. In calcined samples at 600°C a positive effect on the specific surface area for the “in situ” phosphated sample was found. X-ray diffraction patterns showed that the presence of phosphates ions stabilized the anatase phase. FTIR-pyridine adsorption identified only Lewis acid sites in phosphated samples. In the isopropanol decomposition for “in situ” phosphated titania, the activity was six times higher than that obtained for titania phosphated by impregnation, showing strong acidity for the in situ phosphated TiO2 catalyst.
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References
K. Tanabe and W.F. Hoelderich, Appl. Catal A. 181, 399 (1999).
R. Bartos, F. Lónyi, J. Engelhardt, and J. Valyoin, Topics in Catalysis 10, 79 (2000).
H. Yin-Yan, Z. Bi-Ying, and X. Tou-Change, Appl. Catal. A. 171, 65 (1998).
G. Larsen, F. Loreto, M. Nasity, L.M. Petkovu, and D.S. Shobe, J. Catal. 164, 246 (1996).
M. Hino and K. Arata, J. Chem. Commun. 851 (1980).
C. Morterra, G. Cerrato, C. Emmanuel, and V. Bolis, J. Catal. 142, 349 (1993).
C. Morterra, G. Cerrato, F. Pinna, and M. Signoretto, J. Phys. Chem. 98, (12) 373 (1994).
A. Clearfield, G.P.D. Serrett, and H.A. Khazi-Syed, Catal. Today 20, 295 (1994).
A. Clearfield, J. Catal. 27, 251 (1984).
G. Alberti, S. Cavalagio, S. Marmottini, K. Matusek, J. Megyeri, and L. Szirtes, Appl. Catal. A. 218, 219 (2001).
P.K. Pattnayak, and K.M. Parida, J. Coll. Interface Sci. 226, 340 (2000).
M. Signoretto, F. Pinna, G. Strukul, G. Cerrato, and C. Morterra, Catal. Lett. 36, 129 (1996).
S.K. Samatarray, and K. Parida, Appl. Catal. A. 220, 9 (2001).
K.M. Parida, M. Achar, S.K. Samatarray, and T. Mishra, J. Coll. Interface Sci. 217, 388 (1999).
A. Hess and E. Kemnitz, Appl. Catal. A. 149, 3373 (l997).
G. Basca, G. Ramis, V. Lorenzelli, P.F. Rossi, A. La Ginestra, and A. Patrone, Langmuir 5, 917 (1999).
M. Lewis and R.A. Kydd, J. Catal. 132, 465 (1991).
H. Nollery and G. Ritter, J. Chem. Faraday. Trans 80, 275 (1984).
R. Gomez, T. Lopez, E. Ortiz-Islas, J. Navarrete, E. Sánchez, F. Tzompantzi, and X. Bokhimi. J. Mol. Catal. A Chemical 193, 217 (2003).
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Ortiz-Islas, E., López, T., Gomez, R. et al. Effect of phosphate ions in the properties of titania sol-gel. J Sol-Gel Sci Technol 37, 165–168 (2006). https://doi.org/10.1007/s10971-005-6622-1
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DOI: https://doi.org/10.1007/s10971-005-6622-1