Structured catalytic nanoparticles and method of preparation
US9415373B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2011 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Apr 22, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/902
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of making a structured, doped, cerium oxide nanoparticle includes (a) forming a first reaction mixture including cerium(III), an optional metal ion other than cerium, a base, a stabilizer, and a solvent, (b) contacting the first reaction mixture with an oxidant, (c) forming a cerium oxide nanoparticle core by heating the product of step (b), (d) forming a second reaction mixture by combining with the first reaction mixture one or more metal ions other than cerium, and an optional additional quantity of cerium(III), and (e) forming a shell surrounding the core of cerium oxide by heating the second reaction mixture to produce a product dispersion of structured cerium oxide nanoparticles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.