Multicomponent nanoparticles formed using a dispersing agent

Details Multicomponent nanoparticles formed using a dispersing agent Multicomponent nanoparticles formed using a dispersing agent

B - Operations, Transporting

01

J

B01J 23/00 (2006.01)

Patent

CA 2579785

Nanoparticles include a plurality of two or more dissimilar components selected from the group of noble metals, base transition metals, alkali earth metals, and rare earth metals and/or different groups of the periodic table of elements. The two or more dissimilar components are dispersed using a dispersing agent such that the nanoparticles have a substantially uniform distribution of the two or more dissimilar components. The dispersing agents can be poly functional small organic molecules, polymers, or oligomers, or salts of these. The molecules of the dispersing agent bind to the particle atoms to overcome same-component attractions, thereby allowing dissimilar components to form heterogeneous manoparticles. Dissimular components such as iron and platinum can be complexed using the dispersing agent to form sbstantially uniform heterogeneous nanoparticles. The nanoparticles can be used alone or applied to a support. At least a portion of the dispersing agent can be removed by reduction and/or oxidation.

La présente invention concerne des nanoparticules comportant une pluralité de composants dissemblables choisi dans les groupe des métaux nobles, des métaux de transition de base, des métaux alcalino-terreux, et des métaux de terres rares et/ou de différents groupes de la table périodique des éléments. Les composants considérés sont dispersés au moyen d'un dispersant de façon à obtenir une distribution sensiblement uniforme de ces composants. Les dispersants sont des petites molécules organiques multifoncitonnelles, ou certains de leurs polymères, oligomères ou sels. Les molécules du dispersant se lient aux atomes des particules de façon à vaincre les attractions entre composants identiques, ce qui permet aux composants dissemblables de former des nanoparticules hétérogènes. Les composants dissemblables tels que le fer et le platine peuvent être mis en complexes au moyen du dispersant de façon à former des nanoparticules hétérogènes sensiblement uniformes. Ces nanoparticules s'utilisent seules ou appliquées à un support. Une partie au moins du dispersant s'élimine par oxydoréduction.

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