Journal of Materials Science

, Volume 44, Issue 11, pp 2743–2751 | Cite as

Single step synthesis of nanosized CeO2–MxOy mixed oxides (MxOy = SiO2, TiO2, ZrO2, and Al2O3) by microwave induced solution combustion synthesis: characterization and CO oxidation

  • Benjaram M. ReddyEmail author
  • Gunugunuri K. Reddy
  • Ibram Ganesh
  • Jose M. F. Ferreira


Various CeO2MxOy (MxOy = SiO2, TiO2, ZrO2, and Al2O3) mixed oxides were prepared by microwave induced solution combustion method and analyzed by different complimentary techniques, namely, X-ray diffraction (XRD), Raman spectroscopic (RS), UVVis diffuse reflectance spectroscopy (UV-DRS), X-ray photoelectron spectroscopy (XPS), thermogravimetry (TG-DTA), and BET surface area. XRD analyses revealed that CeO2SiO2 and CeO2TiO2 mixed oxides are in slightly amorphous form and exhibit only broad diffraction lines due to cubic fluorite structure of ceria. XRD lines due to the formation of cubic Ce0.5Zr0.5O2 were observed in the case of CeO2ZrO2 sample. RS results suggested defective structure of the mixed oxides resulting in the formation of oxygen vacancies. The UV-DRS measurements provided valid information about Ce4+ ← O2− and Ce3+ ← O2− charge transfer transitions. XPS studies revealed the presence of cerium in both Ce3+ and Ce4+ oxidation states. The ceria–zirconia combination exhibited better oxygen storage capacity (OSC) and CO oxidation activity when compared to other samples. The significance of present synthesis method lays mostly on its simplicity, flexibility, and the easy control of different experimental factors.


Ceria CeO2 Mixed Oxide Fluid Catalytic Crack Oxygen Storage Capacity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



GKR thank UGC, New Delhi for senior research fellowship. The support of CICECO is also acknowledged.


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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Benjaram M. Reddy
    • 1
    Email author
  • Gunugunuri K. Reddy
    • 1
  • Ibram Ganesh
    • 2
  • Jose M. F. Ferreira
    • 3
  1. 1.Inorganic and Physical Chemistry DivisionIndian Institute of Chemical TechnologyHyderabadIndia
  2. 2.International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI)HyderabadIndia
  3. 3.Department of Ceramics and Glass Engineering, CICECOUniversity of AveiroAveiroPortugal

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