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Method for controlling size of Birnessite type manganese dioxide nanoflower

A technology of manganese dioxide and nanoflowers, applied in the direction of manganese oxide/manganese hydroxide, nanotechnology, etc., can solve the problems of uncontrollable size, narrow size range of manganese dioxide nanoflowers, etc., and achieve the effect of accelerating the reaction rate

Pending Publication Date: 2022-03-15
河北地质大学
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention proposes a method for controlling the size of Birnessite-type manganese dioxide nanoflowers, which solves the problem of narrow size range and uncontrollable size of manganese dioxide nanoflowers synthesized by a single method in the prior art

Method used

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  • Method for controlling size of Birnessite type manganese dioxide nanoflower
  • Method for controlling size of Birnessite type manganese dioxide nanoflower
  • Method for controlling size of Birnessite type manganese dioxide nanoflower

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Experimental program
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Effect test

Embodiment 1

[0034] The three-necked flask was placed in a 90°C constant temperature water bath, and the KMnO 4 Solution (0.1mol / L, 100mL) was added into a three-necked flask and a magnetic stirrer was added, stirring continuously; then sodium oleate solution (0.05mol / L, 1.6mL) was added, mixed evenly, and H 2 SO 4 Solution (2mol / L, 10mL) continued to react until the solution was colorless, then the three-necked flask was taken out from the water bath and cooled to room temperature, and the resulting precipitate was washed with distilled water, washed with absolute ethanol, and dried in an oven. Grind into powder to obtain manganese dioxide nanoflowers, and the scanning electron microscope (SEM) morphology is as follows figure 1 As shown, the XRD spectrum is as Figure 7 As shown, the results show birnessite-type manganese dioxide as a pure phase.

Embodiment 2

[0036] The three-necked flask was placed in a 90°C constant temperature water bath, and the KMnO 4 Solution (0.1mol / L, 100mL) was added into a three-necked flask and a magnetic stirrer was added, stirring continuously; then sodium oleate solution (0.05mol / L, 2mL) was added, mixed evenly, and H 2 SO 4 Solution (2mol / L, 10mL) continued to react until the solution was colorless, then the three-necked flask was taken out from the water bath and cooled to room temperature, and the resulting precipitate was washed with distilled water, washed with absolute ethanol, and dried in an oven. Grind into powder to obtain manganese dioxide nanoflowers, and the scanning electron microscope (SEM) morphology is as follows figure 2 shown.

Embodiment 3

[0038] The three-necked flask was placed in a 90°C constant temperature water bath, and the KMnO 4 Solution (0.1mol / L, 100mL) was added into a three-necked flask and a magnetic stirrer was added, stirring continuously; then sodium oleate solution (0.05mol / L, 2.8mL) was added, mixed evenly, and H 2 SO 4 Solution (2mol / L, 10mL) continued to react until the solution was colorless, then the three-necked flask was taken out from the water bath and cooled to room temperature, and the resulting precipitate was washed with distilled water, washed with absolute ethanol, and dried in an oven. Grind into powder to obtain manganese dioxide nanoflowers, and the scanning electron microscope (SEM) morphology is as follows image 3 shown.

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Abstract

The invention relates to the technical field of inorganic nano materials, and provides a method for controlling the size of a Birnessite type manganese dioxide nanoflower, which is characterized in that in an acidic medium, KMnO4 is taken as a raw material, a sodium oleate solution is taken as a size regulator, and the Birnessite type manganese dioxide nanoflower is synthesized through reaction. According to the technical scheme, the problems of narrow size range and uncontrollable size of the manganese dioxide nanoflower synthesized by a single method in the prior art are solved.

Description

technical field [0001] The invention relates to the technical field of inorganic nanomaterials, in particular to a method for controlling the size of Birnessite type manganese dioxide nanoflowers. Background technique [0002] Manganese dioxide is an important transition metal oxide, which is widely used in various fields such as catalysts, electrode materials, and adsorption materials, and its synthesis method has also received extensive attention. [0003] At present, the methods for synthesizing nano-manganese dioxide include: low-temperature liquid phase method, impregnation and calcination method, redox method and hydrothermal method, etc. Through the above methods, researchers have prepared manganese dioxide nanomaterials with different shapes and crystal forms. However, there are relatively few relevant contents on the size control of manganese dioxide. However, the size range of manganese dioxide nanomaterials synthesized by a single method is narrow, or the size in...

Claims

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Application Information

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IPC IPC(8): C01G45/02B82Y40/00
CPCC01G45/02B82Y40/00C01P2004/62C01P2004/64C01P2004/30
Inventor 郝新丽
Owner 河北地质大学
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