Facile synthesis of CeO2 nanoplates and nanorods by [100] oriented growth

• Published in: Journal of colloid and interface science Vol. 341; no. 1; pp. 12 - 17
• Main Authors: Lin, Hsin-Lung, Wu, Cheng-Yu, Chiang, Ray-Kuang
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 01.01.2010; Elsevier
• Subjects: Cerium oxide; Chemistry; Colloidal state and disperse state; Exact sciences and technology; General and physical chemistry; Nanoplates; Nanorods; Preferred orientation; Surface physical chemistry; Thermal decomposition; Nanoplates; Cerium oxide; Thermal decomposition; Preferred orientation; Nanorods; Binary compound; Growth; Cerium; Acetate; High temperature; Powder; Lanthanide compound; Particle; Synthesis; Oleic acid; Atmosphere; Morphology; Room temperature
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2009.04.047

This study demonstrated a facile method for the fast synthesis of CeO2 nanoplates and nanorods via the thermal decomposition of a mixture of cerium acetate, oleic acid, oleyamine and 1-octadecene under air atmospheres. The way of addition of the activator and the reaction atmosphere are found to the two key factors for the fast morphology-selective syntheses of CeO2 nanoplates and nanorods. This study demonstrated a facile method for the synthesis of CeO2 nanoplates and nanorods via the thermal decomposition of a mixture of cerium acetate, oleic acid, oleyamine and 1-octadecene under controlled atmospheres. Morphologies of the produced cerium oxides were controlled by the adding procedures of activators. Activators added at room temperature and heated with the reaction mixture result in the formation of nanoplates. Injection of activators at high temperature leads to the formation of nanorods. Both the nanoplates and nanorods are achieved via the [100] oriented assembly of smaller particles. A blue-shifting of the UV absorption threshold edge are observed for the cerium oxide nanoplates and nanorods, contrasting with the bulk commercial powders.