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  • 1 Instituto de Química, Universidade de São Paulo, CP 26077, São Paulo, SP, 05513-970, Brazil
  • 2 Departamento de Ciências Exatas e da Terra, Universidade Federal de São Paulo, São Paulo, SP, Brazil
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Abstract

Three different cerium citrate-based precursors were used for synthesizing CeO2 through thermal treatment. Three morphological types of CeO2 were obtained. Characterization of these oxides was carried out by XRD patterns, SEM microscopy, N2 adsorption isotherms, Raman spectroscopy, zeta potential, and UV/Vis luminescence. Ozonation of phenol catalyzed by CeO2 was studied as a representative reaction of environmental interest. The differences on the catalytic activity showed by these three oxides could be correlated to amounts of Ce3+ on CeO2 surface and, consequently, to the demand for oxygen needed to burn each precursor.

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