Controlled precipitation of zinc oxide particles at room temperature - Archive ouverte HAL
Article Dans Une Revue Chemistry of Materials Année : 2003

Controlled precipitation of zinc oxide particles at room temperature

Résumé

Zinc nitrate precipitated with NaOH solution at room temperature under double-jet conditions produced micrometric zinc oxide particles with ellipsoid or starlike morphology separated by only a slight variation of pH (9.5 and 10.5, respectively). The formation kinetics of starlike particles was followed by SEM observations, suggesting that they result from a solid-state transformation of the hydroxide matrix. This mechanism involved the nucleation of 30-nm ZnO particles inside the matrix, followed by their aggregation into starlike particles. The introduction of sodium sulfate or sodium dodecyl sulfate in the bath before precipitation led to a drastic size reduction and to a diversity of particle shapes (from half-ellipsoids to full ellipsoids). The presence of these additives provided important hints on particle formation and confirmed that submicronic particles resulted from nanocrystals oriented aggregation.

Dates et versions

hal-00166090 , version 1 (31-07-2007)

Identifiants

Citer

Ana Paula Almeida de Oliveira, Jean-François Hochepied, François Grillon, Marie-Hélène Berger. Controlled precipitation of zinc oxide particles at room temperature. Chemistry of Materials, 2003, 15, pp.3202-3207. ⟨10.1021/cm0213725⟩. ⟨hal-00166090⟩
134 Consultations
0 Téléchargements

Altmetric

Partager

More