Direct Thermal Decomposition of Metal Nitrates in Octadecylamine to Metal Oxide Nanocrystals

✍ Scribed by Ding-Sheng Wang; Ting Xie; Qing Peng; Shao-Yan Zhang; Jun Chen; Ya-Dong Li

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 914 KB
• Volume: 14
• Category: Article
• ISSN: 0947-6539
• DOI: 10.1002/chem.200701668

✦ Synopsis

Abstract

We have developed a method for the synthesis of metal oxide nanocrystals with controllable shape and size, which is based on the direct thermal decomposition of metal nitrates in octadecylamine. Mn~3~O~4~ nanoparticles and nanorods with different lengths were synthesized by using manganese nitrate as the decomposition material. Other metal oxide nanocrystals such as NiO, ZnO, CeO~2~, CoO, and Co~3~O~4~ were also prepared by this method. These nanocrystals were then assembled into 3D colloidal spheres by a surfactant‐assisted self‐assembly process. Subsequently, calcination was carried out to remove the surfactants to obtain mesoporous metal oxides, which show large pores, good crystallization, thermally stable pore mesostructures, and potential applications in various fields, especially in catalysis and lithium‐ion batteries.