Synthesis of alcoholic ZnO nanocolloids in the presence of piperidine organic base: Nucleation-Growth evidence of Zn5(OH)8Ac2.2H2O fine particles and ZnO nanocrystals

F. Grasset (1) , Olivier Lavastre (1) , Christian Baudet (1) , T. Sasaki (2) , H. Haneda (2)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 NIMS - National Institute for Materials Science

Piperidine as a new free OH− organic base has been successfully used to prepare Zn5(OH)8(Ac)2⋅2H2O particles (named Zn-HDS) or concentrated alcoholic ZnO sols. Considering the applications of Zn-HDS and ZnO compounds, as well as interests of these synthesis mechanisms for fundamental chemistry, such investigations are of importance. This strategy not only allows preparing Zn-HDS compounds at room temperature but also brings evidence of some new nucleation-growth, and permits the preparation of well crystalline ZnO nanocrystals at low temperature (maximum 60 °C). It was possible to convincingly prove that the formation of Zn-HDS phase is concomitant to the ZnO nanocrystals formation and that Zn-HDS could be considered as an intermediate initiator of ZnO nanocrystals. A parallel approach was used for the fast screening of the synthesis progress.

Mots clés: Zinc oxide; nanocolloids; Zn-HDS; nucleation; growth; piperidine; parallel screening; Zinc oxide

Domaines: Matériaux; Catalyse

F. Grasset, Olivier Lavastre, Christian Baudet, T. Sasaki, H. Haneda. Synthesis of alcoholic ZnO nanocolloids in the presence of piperidine organic base: Nucleation-Growth evidence of Zn5(OH)8Ac2.2H2O fine particles and ZnO nanocrystals. Journal of Colloid and Interface Science, 2008, 317 (2), pp.493-500. ⟨10.1016/j.jcis.2007.09.078⟩. ⟨hal-00341801⟩