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Preparation method of hollow nano-manganese dioxide

A nanometer manganese dioxide, hollow technology, applied in manganese oxide/manganese hydroxide, nanotechnology, nanotechnology and other directions, can solve the problems of uneven particle size distribution, large influence of hollow structure, large particle size of hollow microspheres, etc. , to achieve the effect of increasing strength, uniform particle size distribution, and increasing specific surface area

Active Publication Date: 2014-07-23
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, many researchers use hydrothermal method to prepare hollow manganese dioxide, but the obtained hollow microspheres have large particle size and uneven particle size distribution. Many researchers also prepare hollow nano manganese dioxide by template method combined with hydrothermal method. However, the subsequent process of removing the template has a greater impact on the hollow structure

Method used

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  • Preparation method of hollow nano-manganese dioxide
  • Preparation method of hollow nano-manganese dioxide
  • Preparation method of hollow nano-manganese dioxide

Examples

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Effect test

Embodiment 1

[0026] First, slowly add 2mL of concentrated sulfuric acid to 50mL of deionized water, then dissolve 1.69g of manganese sulfate in the above solution, then slowly add 0.948g of potassium permanganate, stir magnetically for 20min at room temperature, and then move to the autoclave , react at 150° C. for 1 h, and finally wash the obtained product several times with deionized water and dry at 80° C. for 12 h to obtain hollow nano manganese dioxide.

Embodiment 2

[0028] First, slowly add 2 mL of concentrated sulfuric acid into 50 mL of deionized water, then dissolve 1.69 g of manganese sulfate in the above solution, then slowly add 0.948 g of potassium permanganate and 0.5 g of cerium nitrate hexahydrate in sequence, and stir magnetically for 20 min at room temperature , and then moved to an autoclave, reacted at 150°C for 1h, and finally washed the obtained product several times with deionized water and dried at 80°C for 12h to obtain hollow nano manganese dioxide.

Embodiment 3

[0030] First, slowly add 2 mL of concentrated sulfuric acid dropwise to 50 mL of deionized water, then dissolve 1.69 g of manganese sulfate in the above solution, then slowly add 0.948 g of potassium permanganate and 0.75 g of cerium nitrate hexahydrate in sequence, and stir magnetically for 20 min at room temperature , and then moved to an autoclave, reacted at 150°C for 1h, and finally washed the obtained product several times with deionized water and dried at 80°C for 12h to obtain hollow nano manganese dioxide.

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Abstract

The invention provides a preparation method of hollow nano-manganese dioxide. The preparation method comprises the step: by taking potassium permanganate and manganese sulfate as raw materials, leading in cerium ions, to prepare hollow nano-manganese dioxide by adopting a hydrothermal method. Through leading in cerium ions, the chemical potential of the solution can be increased, a one-dimensional nanowire structure is favorably formed, and due to the existence of cerium ions, the reaction rate of the system can be reduced, the nucleation rate can be increased, finally the hollow manganese dioxide structure comprising the manganese dioxide nanowires is finally formed, the specific surface area of the manganese dioxide can be greatly enlarged, and the hollow nano-manganese dioxide can be used for preparing a supercapacitor electrode material.

Description

technical field [0001] The invention belongs to the field of nanosphere preparation, and in particular relates to a method for preparing hollow nano manganese dioxide. Background technique [0002] As an important functional inorganic material, manganese dioxide has ample sources, low price and environmental friendliness, which has aroused great interest of researchers. Due to its unique physical and chemical properties, it has been widely used in catalysts, adsorption and electrochemical supercapacitors. As an electrode material, the performance of manganese dioxide is relatively poor compared to noble metal oxides. The hollow structure has received extensive attention due to its high specific surface area, low density and large cavity volume. The preparation of hollow nano manganese dioxide can be Significantly increase the specific surface area of ​​manganese dioxide, increase its specific capacitance, and can be used as a supercapacitor electrode material. [0003] At ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02B82Y30/00B82Y40/00
Inventor 郑玉婴汪晓莉
Owner FUZHOU UNIV