Cobalt oxide nanoparticle preparation
AssigneeCerion, LLC
InventorDavid Wallace Sandford
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Abstract
A method of making stable aqueous dispersions and concentrates of cobalt oxide nanoparticles is described, wherein a reaction mixture comprising cobalt(II) ion, a carboxylic acid, a base, an oxidant and water is formed, and in which cobalt oxide nanoparticles are formed. Cobalt oxide nanoparticles ranging in average crystallite size from about 4 nm to 15 nm are described. The cobalt oxide nanoparticles may be isolated and redispersed to form stable, homogeneous, aqueous dispersions of cobalt oxide nanoparticles containing from about 1 to about 20 weight percent cobalt oxide.
Claims15
A method of making nanoparticles, comprising:
- a. forming a reaction mixture comprising cobalt(II) ion, a carboxylic acid, a base, an oxidant, and water;
- and
- b. directly forming a dispersion of cobalt oxide nanoparticles in the reaction mixture.
An aqueous nanoparticle dispersion comprising cobalt oxide nanoparticles and a carboxylic acid, wherein said cobalt oxide nanoparticles are characterized by an average crystallite size ranging from about 4 nanometers to about 15 nanometers.
A nanoparticle comprising cobalt oxide and a carboxylic acid, wherein said cobalt oxide nanoparticles are characterized by an average crystallite size ranging from about 4 nanometers to about 15 nanometers, wherein said carboxylic acid is a water soluble carboxylic acid comprising a C1-C6 alkyl carboxylic acid.
Dependencies are inferred from the claim text.