Facile Synthesis of CeO2 Nanospheres

✍ Scribed by Na TA; Milin ZHANG; Juan LI; Huaju LI; Yong LI; Wenjie SHEN

• Book ID: 104452855
• Publisher: Elsevier Science
• Year: 2008
• Weight: 477 KB
• Volume: 29
• Category: Article
• ISSN: 1872-2067
• DOI: 10.1016/s1872-2067(09)60002-4

✦ Synopsis

Ceria nanospheres with an average size of 320 nm were prepared by a urea-hydrothermal route. The ceria nanospheres had a core-shell structure constructed by nanoparticles and nanosheets that predominantly exposed the {111} planes. Urea hydrolysis produced CO 2 3 and OH species as precipitation agent and simultaneously produced ammonia bubbles that acted as a structure-directing agent for the formation of the CeO 2 nanospheres. The redox properties and catalytic activity of the CeO 2 nanospheres were examined by hydrogen temperature-programmed reduction and CO oxidation, respectively.