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A kind of preparation method of manganese oxide nanosphere

A technology of nanospheres and manganese oxide, applied in the direction of manganese oxide/manganese hydroxide, nanotechnology, nanotechnology, etc., can solve the problem of high equipment or operating experience requirements, difficult industrial application of existing technologies, and total output of a single batch Low-level problems, to achieve the effects of avoiding elemental pollution, environmental protection and pollution-free processing, and good electrochemical characteristics

Active Publication Date: 2019-02-12
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The manganese oxide nanospheres prepared by these methods have high purity, good dispersibility, uniform particle distribution, and excellent electrochemical properties, but the preparation process is complicated, the requirements for equipment or operating experience are high, and the total output of a single batch is low. The cycle of synthesis and preparation is long, and it is often necessary to clean the final product or intermediate product, discharge a large amount of polluting waste liquid, and mostly stay in the stage of laboratory research and development or small-scale low-yield pilot production
It is precisely the problems caused by these deficiencies such as high initial investment, low production efficiency, poor technology reproducibility, high production cost, and difficult disposal of waste gas and liquid, which make it difficult for existing technologies to obtain industrial applications.

Method used

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  • A kind of preparation method of manganese oxide nanosphere
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  • A kind of preparation method of manganese oxide nanosphere

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] First, weigh 500-mesh CaSi 2 powder, Mg powder, Al powder, MnO 2 powder, Mn powder and MgO powder, and uniformly mix them, and put the obtained raw material powder 2 into a high-purity graphite crucible 3. Then, the high-purity graphite crucible 3 is placed in the center of the nickel disc 1 whose diameter is 5 times of the crucible outer diameter, as figure 1 , as shown in 2. Finally, use a laser igniter to ignite the raw material powder 2 to make it burn and react, and keep the surrounding environment in a windless state throughout the process. After the reaction is over, keep the windless state, and let the target product (dusty) fall naturally, settle and be adsorbed on the surface of the nickel disc 1 . After all the target products have settled, the manganese oxide nanospheres attached thereto can be collected from the surface of the nickel disc 1 . The obtained nanospheres were observed by TEM, SEM and analyzed by XRD and EDS. The results showed that the obta...

Embodiment 2

[0033] First, weigh 700-mesh CaSi 2 powder, Mg powder, Al powder, MnO 2 powder, Mn powder and MgO powder, and uniformly mix them, and put the obtained raw material powder 2 into a high-purity graphite crucible 3. Then, the high-purity graphite crucible 3 is placed at the center of the nickel disc 1 with a diameter of 3.5 times the crucible outer diameter, as figure 1 , as shown in 2. Finally, use a laser igniter to ignite the raw material powder 2 to make it burn and react, and keep the surrounding environment in a windless state throughout the process. After the reaction is over, keep the windless state, and let the target product (dusty) fall naturally, settle and be adsorbed on the surface of the nickel disc 1 . After all the target products have settled, the manganese oxide nanospheres attached thereto can be collected from the surface of the nickel disc 1 . The obtained nanospheres were observed by TEM, SEM and analyzed by XRD and EDS. The results showed that the obta...

Embodiment 3

[0035] First, weigh 1000-mesh CaSi 2 powder, Mg powder, Al powder, MnO 2 powder, Mn powder and MgO powder, and uniformly mix them, and put the obtained raw material powder 2 into a high-purity graphite crucible 3. Then, the high-purity graphite crucible 3 is placed at the center of the nickel disc 1 with a diameter of 2.5 times the crucible outer diameter, as figure 1, as shown in 2. Finally, use a laser igniter to ignite the raw material powder 2 to make it burn and react, and keep the surrounding environment in a windless state throughout the process. After the reaction is over, keep the windless state, and let the target product (dusty) fall naturally, settle and be adsorbed on the surface of the nickel disc 1 . After all the target products have settled, the manganese oxide nanospheres attached thereto can be collected from the surface of the nickel disc 1 . The obtained nanospheres were observed by TEM, SEM and analyzed by XRD and EDS. The results showed that the obta...

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Abstract

The invention belongs to the field of nano material synthesizing and preparation and particularly relates to a preparation method of manganese oxide nanospheres. The preparation method is characterized in that CaSi2 powder, Mg powder, Al powder, MnO2 powder, Mn powder and MgO powder are mixed according to a certain proportion, and the mixed powder are placed into a crucible and ignited with a laser igniter in a place without wind; after the combustion reaction of the powder in the crucible, the wind-free state is kept to allow target products (powdered) to drift down naturally, settle and attach to the surface of a nickel plate on the periphery of the crucible; after all the target products settle, the manganese oxide nanospheres attached to the surface of the nickel plate are collected. The preparation method has the advantages that the method is low in equipment investment, high in production efficiency, simple to operate, good in technology reproducibility, high in single-batch yield and environmentally friendly and pollution free in production, and the obtained manganese oxide nanospheres are high in purity, excellent in quality and worthy of industrial popularization.

Description

technical field [0001] The invention belongs to the field of synthesis and preparation of nanomaterials, and in particular relates to a preparation method of manganese oxide nanospheres. Background technique [0002] There are many kinds of manganese oxides, and the properties and uses of various manganese oxides depend not only on the valence state of Mn but also on its structure. Usually the so-called manganese oxide refers to the chemical formula MnO x (x between 1-2) manganese oxide has a tunnel structure and is mainly used as the basic raw material for catalysts, adsorbents, sensors, wave absorbers, manganese oxide lithium primary batteries, lithium ion battery positive electrodes, ion sieves, etc. Nano-scale manganese oxide nanospheres show many special properties due to small size effect, quantum size effect, surface effect and macroscopic quantum tunneling effect, such as more excellent electrochemical characteristics, catalytic ability, wave absorption and adsorpti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G45/02C01P2004/03C01P2004/32C01P2004/62C01P2004/64
Inventor 刘念张强牛文娟曾荣王洪昌
Owner HUAZHONG AGRI UNIV