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Manganese-cobalt spinel oxide nanowire arrays
US11623206B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11623206-B2 |
| Application number | US-201816465948-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 1, 2018 |
| Priority date | Jun 1, 2017 |
| Publication date | Apr 11, 2023 |
| Grant date | Apr 11, 2023 |
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Abstract
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Manganese-cobalt (Mn—Co) spinel oxide nanowire arrays are synthesized at low pressure and low temperature by a hydrothermal method. The method can include contacting a substrate with a solvent, such as water, that includes Mn04- and Co2 ions at a temperature from about 60° C. to about 120° C. The method preferably includes dissolving potassium permanganate (KMn04) in the solvent to yield the Mn04- ions. the substrate is The nanoarrays are useful for reducing a concentration of an impurity, such as a hydrocarbon, in a gas, such as an emission source. The resulting material with high surface area and high materials utilization efficiency can be directly used for environment and energy applications including emission control systems, air/water purifying systems and lithium-ion batteries.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of making a manganese-cobalt (Mn-Co) spinel oxide nanoarray on a 3-D channeled honeycomb substrate, comprising: contacting the 3-D channeled honeycomb substrate with a solvent consisting essentially of a source of MnO 4 − and Co 2+ ions at a temperature from about 60° C. to about 120° C., wherein the MnO 4 − and Co 2+ ions react in a redox reaction to directly form the manganese-cobalt (Mn-Co) spinel oxide nanoarray on the 3-D channeled honeycomb substrate. 2. The method of claim 1 , wherein the source of MnO 4 − ions is potassium permanganate (KMnO 4 ). 3. The method of claim 1 , wherein the source of Co 2+ ions is cobalt nitrate. 4. The method of claim 3 , wherein the cobalt nitrate is cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O). 5. The method of claim 1 , wherein the solvent is water. 6. The method of claim 1 , further comprising varying the concentration of MnO 4 − or Co 2+ ions in the solvent to control deposition rate of the manganese-cobalt spinel oxide nanoarray. 7. The method of claim 1 , further comprising controlling the temperature of the solvent to control deposition rate of the manganese-cobalt spinel oxide nanoarray. 8. The method of claim 1 , wherein the 3-D channeled honeycomb substrate is a cordierite. 9. The method of claim 1 , wherein the contacting step is repeated at least once to increase the thickness of the manganese-cobalt spinel oxide nanoarray.
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Classifications
Nanoparticles · CPC title
Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional [3D] monoliths · CPC title
in the presence of water, e.g. steam · CPC title
Manganese · CPC title
of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title
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- What does patent US11623206B2 cover?
- Manganese-cobalt (Mn—Co) spinel oxide nanowire arrays are synthesized at low pressure and low temperature by a hydrothermal method. The method can include contacting a substrate with a solvent, such as water, that includes Mn04- and Co2 ions at a temperature from about 60° C. to about 120° C. The method preferably includes dissolving potassium permanganate (KMn04) in the solvent to yield the Mn…
- Who is the assignee on this patent?
- Univ Connecticut
- What technology area does this patent fall under?
- Primary CPC classification B01J23/8892. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Apr 11 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).