Preparation of iron or iron oxide nanoparticles

Details Preparation of iron or iron oxide nanoparticles Preparation of iron or iron oxide nanoparticles

C - Chemistry, Metallurgy

01

G

C01G 49/00 (2006.01) C01G 49/06 (2006.01) C01G 49/08 (2006.01)

Patent

CA 2671874

The present teachings are directed towards a thermolysis method of producing iron- containing nanoparticles by providing an iron-containing component, a colloid stabilizing component, and an amount of water. The iron-containing component, the colloid stabilizing component, and the amount of water form a mixture, which is then heated to a temperature sufficient to form iron-containing nanoparticles, which are then isolated from the mixture. Another method is also provided which involves a repetitive shell growth method of producing iron-containing nanoparticles by providing a first amount of an iron-containing component and a colloid stabilizing component; the iron-containing component and the colloid stabilizing component are then mixed and heated to a temperature sufficient to form iron-containing nanoparticles. The mixture is allowed to cool to room temperature, and an additional amount of iron-containing component is added to the mixture, which is then reheated to reaction temperature, and the process is repeated until the isolated iron-containing nanoparticles obtain the desired size.

L'invention concerne un procédé de thermolyse qui permet de produire des nanoparticules contenant du fer au moyen d'un composant contenant du fer, d'un composant colloïde stabilisateur, et d'une quantité d'eau. Le composant contenant du fer, le composant colloïde stabilisateur et la quantité d'eau forment un mélange, que l'on chauffe à une température suffisante pour former des nanoparticules contenant du fer que l'on isole alors du mélange. L'invention se rapporte également à un procédé répétitif de croissance de coques qui permet de produire des nanoparticules contenant du fer au moyen d'une première quantité d'un composant contenant du fer et d'un composant colloïde stabilisateur, le composant contenant du fer et le composant colloïde stabilisateur étant alors mélangés et chauffés à une température suffisante pour former des nanoparticules contenant du fer. On laisse ensuite refroidir le mélange à température ambiante, et l'on ajoute une quantité supplémentaire de composant contenant du fer au mélange, que l'on chauffe à nouveau à la température de réaction, processus que l'on répète jusqu'à ce que les nanoparticules contenant du fer isolées acquièrent la taille désirée.

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