Evaluation of Calcined Temperature on the Structural and Morphological Characterization of TiO₂ Doped with Zr Nanopowders Obtained by the Pechini Method

Abstract:

Because of the unique properties that the system TiO2-ZrO2 has, this system has attracted great interest in catalytic circles. In general, the TiO2-ZrO2 oxides composites have a greater surface area and a stronger acidity when compared to the single oxide and they are used as catalysts supports for many catalytic reactions. This work is to evaluate the effect of calcined temperature in structural and morphological characteristics of Ti_1-xZr_xO₂ nanopowders obtained by Pechini method. For this study, the doping value was 0.25 moles of Zr. The powders were calcined at temperature of 500 to 900°C for one hour. The powders were characterized by XRD, SEM and BET. The X-ray diffraction showed that the powders present a TiO₂ anatase phase and another of ZrO₂ tetragonal. The crystallite size ranged from 4.8 to 14.6 nm for the temperature of 500 to 900°C, respectively. The analysis of scanning electron microscopy showed soft homogeneous agglomerates with particles around 100 nm. The main particles sizes by BET were ranged from 10 to 20 nm, showing that the synthesis is effective to obtain nanometric powders.

• Periodical: Materials Science Forum (Volumes 727-728)
• Pages: 1393-1397
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.727-728.1393
• Online since: August 2012
• Authors: M.A. Ribeiro Bonifácio, Laédna Souto Neiva, Ruth Herta Goldsmith Aliaga Kiminami, J.B.L. de Oliveira, L. Gama
• Keywords: Catalysis, Pechini Method, TiO₂-ZrO₂

References

[1] M. Schiavello: Photocatalysis and Environment. Edited by Kluwer Academic Publishers, Dordrecht, (1988).

[2] N. Serpone and E. Pelizetti: Photocatalysis, Fundamentals and Applications. Edited by Wiley, New York, (1989).

[3] D.F. Ollis and H. Al-Ekabi: Photocatalytic Purification and Treatment of Water and Air. Edited by Elsevier, Amsterdam, (1993).

[4] O. Legrini, E. Oliveros and A. Braun: Chem. Rev. Vol. 93 (1993), p.671.

[5] G. Colo´n, M.C. Hidalgo and J.A. Navý´o: Appl. Catal. A Vol. 231 (2002) 185.

[6] J. Luka´č, M. Klementová, P. Bezdička, S. Bakardjieva, J. Š ubrt, L. Szatmáry, Z. Bastl and J. Jirkovský: Appl. Catal. B: Environmental Vol. 74 (2007), p.83.

DOI: 10.1016/j.apcatb.2007.01.014

[7] M. Breysse, P. Afanasiev, C. Geantet and M. Vrinat: Catal. Today Vol. 86 (2003), p.5.

[8] C. Han, B. Liu, H. Zhang and J. Shen: Acta Phys. -Chim. Sin. Vol. 22 (8) (2006), p.993.

[9] L. Gama, M.A. Ribeiro, B.S. Barros, R.H.A. Kiminami, I.T. Weber and A.C.F.M. Costa: J. Alloys & Comp. Vol. 483 (2009), p.453.

[10] H. Klug and L. Alexander: X-Ray Powder Procedures. Edited by Wiley, New York, (1962), p.491.

[11] H. Zou and Y.S. Lin.: Appl. Catal. A: Vol. 265 (2004) 35.

[12] S. Braunauer, L.S. Demis, W.S. Deming and E. Teller: J. Amer. Chem. Soc. Vol. 62 (1940), p.1723.

[13] S.J. Gregg and K.S.W. Sing: Adsorption, Surface Area and Porosity,. 2ª Edition, edited by Academic Press, London, (1982).

[14] M. Laniecki and M. Ignacik: Catal. Today Vol. 116 (2006), p.400.

[15] J.S. Reed: Principles of Ceramics Processing,. Edited by John Wiley & Sons, New York, (1996).

[16] R. Pérez-Hernández , D. Mendoza-Anaya , M.E. Fernáandez, A. Gómez-Cortés: J. Molec. Catal. A: Chem. Vol. 281 (2008), p.200.