Structural studies of mesoporous ZrO2-CeO2 and ZrO2-CeO2/SiO2 mixed oxides for catalytical applications
作者： R. Bacani , T.S. Martins , M.C.A. Fantini , D.G. Lamas
DOI: 10.1016/J.JALLCOM.2016.01.213
关键词: Chemical engineering 、 Solid solution 、 Mesoporous organosilica 、 Crystallization 、 Materials science 、 XANES 、 Cubic zirconia 、 Nanotechnology 、 Specific surface area 、 Small-angle X-ray scattering 、 Mesoporous material
摘要: In this work the synthesis of ZrO2-CeO2 and ZrO2-CeO2/SiO2 were developed, based on process to form ordered mesoporous materials such as SBA-15 silica. The triblock copolymer Pluronic P-123 was used template, aiming obtain crystalline single phase walls larger specific surface area, for future applications in catalysis. SAXS XRD results showed a relationship between pores material crystallization. 90% CeO2 leaded homogeneous ceria-zirconia solid solution cubic fluorite structure (Fm3¯ m). SiO2 addition improved structural textural properties well reduction behavior at lower temperatures, investigated by XANES measurements under H2 atmosphere.
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sci-hub.se 参考文章(39)
G. Vlaic, R. Di Monte, P. Fornasiero, E. Fonda, J. Kašpar, M. Graziani, The CeO2-ZrO2 System: Redox Properties and Structural Relationships. Catalysis and Automotive Pollution Control IV, Proceedings of the Fourth International Symposium (CAPoC4). ,vol. 116, pp. 185- 195 ,(1998) , 10.1016/S0167-2991(98)80876-8
Harun Tüysüz, Ferdi Schüth, Ordered Mesoporous Materials as Catalysts Advances in Catalysis. ,vol. 55, pp. 127- 239 ,(2012) , 10.1016/B978-0-12-385516-9.00002-8
Abdelhamid Sayari, Ping Liu, Non-silica periodic mesostructured materials: recent progress Microporous Materials. ,vol. 12, pp. 149- 177 ,(1997) , 10.1016/S0927-6513(97)00059-X
W. Schäfer, E. Jansen, G. Will, Angle-dispersive time-of-flight diffraction in a pulsed beam : an efficient technology to exploit the thermal-neutron spectrum : design of a JULIOS diffractometer and experimental tests Journal of Applied Crystallography. ,vol. 26, pp. 660- 669 ,(1993) , 10.1107/S0021889893003267
T. Ressler, WinXAS: a program for X-ray absorption spectroscopy data analysis under MS-Windows. Journal of Synchrotron Radiation. ,vol. 5, pp. 118- 122 ,(1998) , 10.1107/S0909049597019298
K. S. W. Sing, Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity (Recommendations 1984) Pure and Applied Chemistry. ,vol. 57, pp. 603- 619 ,(1985) , 10.1351/PAC198557040603
M. Melchionna, P. Fornasiero, The role of ceria-based nanostructured materials in energy applications Materials Today. ,vol. 17, pp. 349- 357 ,(2014) , 10.1016/J.MATTOD.2014.05.005
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, J. L. Schlenker, A new family of mesoporous molecular sieves prepared with liquid crystal templates Journal of the American Chemical Society. ,vol. 114, pp. 10834- 10843 ,(1992) , 10.1021/JA00053A020
J DEBOER, Studies on pore systems in catalysts: VI. The universal t curve Journal of Catalysis. ,vol. 4, pp. 643- 648 ,(1965) , 10.1016/0021-9517(65)90263-0
Freddy Kleitz, Wolfgang Schmidt, Ferdi Schüth, Evolution of mesoporous materials during the calcination process: structural and chemical behavior Microporous and Mesoporous Materials. ,vol. 44-45, pp. 95- 109 ,(2001) , 10.1016/S1387-1811(01)00173-1