CERIUM CONTAINING NANOPARTICLES PREPARED IN NON-POLAR SOLVENT
First Claim
1. A method of making a cerium-containing metal oxide nanoparticle, comprising:
- a) forming a reaction mixture of a source of cerous ion and a solvent, and optionally further comprising a non-cerous metal ion, wherein the solvent consists essentially of;
(1) a carboxylic acid, and (2) an optional hydrocarbon;
b) heating the reaction mixture; and
,c) recovering a cerium-containing metal oxide nanoparticle.
2 Assignments
0 Petitions
Accused Products
Abstract
A method of making cerium-containing metal oxide nanoparticles in non-polar solvent eliminates the need for solvent shifting steps. The direct synthesis method involves: (a) forming a reaction mixture of a source of cerous ion and a carboxylic acid, and optionally, a hydrocarbon solvent; and optionally further comprises a non-cerous metal ion; (b) heating the reaction mixture to oxidize cerous ion to ceric ion; and (c) recovering a nanoparticle of either cerium oxide or a mixed metal oxide comprising cerium. The cerium-containing oxide nanoparticles thus obtained have cubic fluorite crystal structure and a geometric diameter in the range of about 1 nanometer to about 20 nanometers. Dispersions of cerium-containing oxide nanoparticles prepared by this method can be used as a component of a fuel or lubricant additive.
-
Citations
20 Claims
-
1. A method of making a cerium-containing metal oxide nanoparticle, comprising:
-
a) forming a reaction mixture of a source of cerous ion and a solvent, and optionally further comprising a non-cerous metal ion, wherein the solvent consists essentially of;
(1) a carboxylic acid, and (2) an optional hydrocarbon;b) heating the reaction mixture; and
,c) recovering a cerium-containing metal oxide nanoparticle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20)
-
-
15. A method of making cerium-containing metal oxide nanoparticles, comprising:
-
a) forming a reaction mixture comprising a source of cerous ion, an optional source of one or more non-cerous metal ions (M), and a solvent consisting essentially of a carboxylic acid, and, optionally, a hydrocarbon; and b) heating the reaction mixture to oxidize cerous ion to eerie ion; and c) collecting a cubic fluorite crystalline nanoparticle of cerium oxide, CeO2-δ
, or mixed metal oxide, Ce1−
xMxO2−
δ
, wherein x is about 0.001 to about 0.95, and δ
is about 0.0 to about 0.5.
-
Specification