Water-soluble nanostructured metal-oxide colloids and method...

C - Chemistry – Metallurgy – 01 – G

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C01G 55/00 (2006.01) B01J 13/00 (2006.01) B01J 35/00 (2006.01) B01J 37/02 (2006.01) B01J 37/03 (2006.01) B22F 1/00 (2006.01) C09C 3/06 (2006.01)

Patent

CA 2350428

The present invention relates to water-soluble, mono-, di- and multi-metallic metal-oxide colloids as well as to a method for representing the same and to their fixation on a carrier. This method is characterised in that the targeted synthesis of soluble metal-oxide colloids is achieved by the controlled hydrolysis of a noble metal precursor in the presence of a water-soluble stabiliser. The metal-oxide colloids can be reduced according to the needs into corresponding metal colloids. The fixation of the nanoparticles on the carrier can be carried out both at the oxidised state or reduced state of said nanoparticles.

L'invention concerne des colloïdes d'oxyde métallique, mono-, bi- et multimétalliques, solubles dans l'eau, un procédé permettant de les représenter, ainsi que leur fixation sur un support. Ce nouveau procédé se caractérise par la synthèse ciblée de colloïdes d'oxyde métallique solubles, par hydrolyse contrôlée du précurseur de métal noble en présence d'un agent stabilisateur soluble dans l'eau. Ces colloïdes d'oxyde métallique peuvent être réduits selon les besoins en colloïdes métalliques correspondants. La mise sur support des particules de l'ordre du nanomètre peut aussi bien s'effectuer à leur stade oxydé qu'à leur stade réduit.

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