Alloy nanoparticles, process for their preparation and use thereof
AssigneePolyvalor, SociéTé En Commandite
InventorsDAVID RIOUX, MICHEL MEUNIER
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Abstract
There is provided a process for preparing alloy nanoparticles having a desired size. The process comprises a combination of co-reduction of metal salts in the presence of a reducing agent, and multi-step seeded growth synthesis. Also provided is a material which comprises alloy nanoparticles made of at least two metals. A mean diameter of the particles of the material is between about 30 nm and 200 nm as measured by transmission electron microscopy (TEM), and the particles have a coefficient of variation smaller than about 15%.
Claims20
Process for preparing alloy nanoparticles having a desired size, comprising a combination of:
- co-reduction of metal salts in the presence of a reducing agent, and multi-step seeded growth synthesis.
Process for preparing alloy nanoparticles having a desired size, comprising:
- (a) providing an initial seed made of nanoparticles of a metal or an alloy of at least two metals;
- (b) simultaneously adding to the seed, salts of the at least two metals and a reducing agent, to obtain alloy nanoparticles having a first size;
- (c) optionally, simultaneously adding to an alloy seed made of the alloy nanoparticles having a first size obtained at step (b), the salts of the at least two metals and the reducing agent, to obtain alloy nanoparticles having a second size;
- and
- (d) optionally, repeating step (c) a number of time until the desired size is reached, wherein the alloy seed is made of the alloy nanoparticles obtained at a previous step.
Material comprising alloy nanoparticles made of at least two metals, wherein a mean diameter of the particles is between about 30 nm and 200 nm as measured by transmission electron microscopy (TEM), and the particles have a coefficient of variation smaller than about 15%.
Dependencies are inferred from the claim text.