Porous manganese oxide nanoparticles and method for preparing the same
AssigneeIndestry-Academic Cooperation Foundation, Yonsei Universtiy
InventorsHYUNG MO JEONG, Kyu Hyoung LEE
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Abstract
The disclosure relates to porous manganese oxide nanoparticles which include flocculated primary nanoparticles, with air pores formed between the primary nanoparticles. Unlike in the prior art, the porous manganese oxide nanoparticles of the disclosure have 6 nm or less MnO2 primary nanoparticles and Mn3O4 primary nanoparticles uniformly mixed and flocculated, exhibiting a 16 times higher specific surface area as compared with the conventional manganese oxide particles and superior storage characteristics and stability.
Claims16
Porous manganese oxide nanoparticles configured in a form of flocculated primary nanoparticles represented as in chemical formula 1 and primary nanoparticles represented as in chemical formula 2, wherein air pores are formed between the primary nanoparticles, wherein
- Mn3O4-x [Chemical formula 1]
- wherein 0≤×≤0.4.
- MnO2-y [Chemical formula 2]
- wherein 0≤×≤0.2.
Porous manganese oxide nanoparticles prepared by forming first nanoparticles represented as in chemical formula 1 in such a method as to separate Mn clusters by injecting positive ions into lattices of Mn3O4 particles and forming second nanoparticles represented as in chemical formula 2 by partially reducing the first nanoparticles, wherein
- Mn3O4-x [Chemical formula 1]
- wherein 0≤×≤0.4.
- MnO2 [Chemical formula 2]
- wherein 0≤×≤0.2.
A method for preparing porous manganese oxide nanoparticles, the method comprising:
- placing a Mn3O4 thin film layer and an ion generation layer on two opposite surfaces of a separation plate;
- and
- applying a voltage to the Mn3O4 thin film layer and the ion generation layer, wherein
- the ion generation layer includes an alkaline metal, an alkaline earth metal, an alkaline metal-containing alloy, or an alkaline earth metal-containing alloy.
Dependencies are inferred from the claim text.