The role of complexing ligands in the formation of non-aggregated nanoparticles of zirconia |
| |
Authors: | M. Chatry M. Henry M. In C. Sanchez J. Livage |
| |
Affiliation: | (1) Laboratoire de Chimie de la Matière Condensée, Université Pierre et Marie Curie, 4, place Jussieu, 75252 Paris Cédex 05, France |
| |
Abstract: | The hydrolysis and condensation of zirconium n-propoxide in n-propanol have been chemically controlled via the complexation of the zirconium precursor with acetylacetone. The size of the zirconium oxide-based particles is mainly controlled by the complexation ratio x=[acac]/[Zr]. the mean size increases from nanometric to submicronic range when x decreases from 1 to 0.1. Amorphous colloidal particles are obtained at room temperature. They result from a competitive growth/termination mechanism of zirconium-oxo species in the presence of acac surface capping agents. However non-aggregated nanocrystalline particles of tetragonal zirconia, about 2 nm in diameter are formed upon aging at 60°C when hydrolysis is performed in the presence of paratoluene sulfonic acid (PTSA). |
| |
Keywords: | zirconia ZrO2 nanocrystalline particles sol-gel alkoxides |
本文献已被 SpringerLink 等数据库收录! |