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J. Yang, Ch. Artner, L. Lukashuk, U. Schubert:
"Sol-gel synthesis of CeO₂ by using cerium tert-butoxide as precursor";
Poster: COST Action CM1104, Vienna University of Technology, Vienna, Austria; 2013-04-18 - 2013-04-19; in: "COST Action CM1104 - Reducible oxide chemistry, structure and functions", (2013), 62.

CeO₂ materials have been extensively studied and employed in applications, and various methods were adopted to synthesize CeO₂, including sol-gel method. The sol-gel method has many advantages for material synthesis and design, which can easily control the materials´ composition and structure. In the literature, inorganic cerium salts were mainly used as starting material in sol-gel processes to prepare CeO₂, as they are commercially available. Nevertheless, cerium alkoxides are more beneficial to the materials´ properties because the oxo network is formed stepwise during the sol-gel process.
In this work cerium tert-butoxide (Ce(OtBu)₄) was synthesized from ammonium cerium nitrate ((NH₄)₂[Ce(NO₃)₆], CAN), and it was further used to synthesize CeO₂ by sol-gel processing. Acetaldoxime and the surfactant F127 were added as chelating ligand and poreforming agent respectively, to adjust the structure of the synthesized CeO₂. In order to figure out the advantage of Ce(OtBu)₄, CAN was also used to synthesize CeO₂ by the same procedure for comparison. The synthesized materials were characterized by TGA, IR, XRD, BET and others. The results indicated that CeO₂ made from Ce(OtBu)₄ had higher thermal stability and higher surface area than that prepared from CAN. The surface area can reach 165 m²/g for the best preparation conditions.