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Porous manganese dioxide of nanofibre texture and preparation method thereof

A technology of nanofibers and manganese dioxide, which is applied in the direction of manganese oxide/manganese hydroxide, etc., can solve the problems of irregular product appearance, impure product phase, and reduced material purity, and achieve a simple and easy-to-operate synthesis method and easy Effect of industrialization and rich void structure

Inactive Publication Date: 2010-06-30
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the above-mentioned related research methods at home and abroad, the product phase obtained by powder kneading method is impure, and the product has no regular shape; the colloidal template method is easy to reduce the purity of the material, and the removal of the template often causes the destruction of the pore structure. The use of the industrialization makes the high cost of
Porous manganese dioxide textured by nanofibers and low-temperature hydrothermal conversion of manganese trioxide to manganese dioxide have not been reported yet

Method used

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  • Porous manganese dioxide of nanofibre texture and preparation method thereof
  • Porous manganese dioxide of nanofibre texture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve 158g of manganese dichloride tetrahydrate in 4L of water, and dissolve 225g of potassium sodium tartrate tetrahydrate in 4L of water; add potassium sodium tartrate solution to the manganese dichloride solution under magnetic stirring at room temperature, and react for 15 minutes; Then the reaction mixture was transferred to a 10L polytetrafluoroethylene-lined hydrothermal kettle, and hydrothermally reacted at 120°C for 12 hours; cooled to room temperature, the material liquid was taken out for dehydration and washed with distilled water for 5-6 times, and dried at 100°C for 10 hours. A pale pink bar of manganese tartrate was obtained.

[0022] Place the dried manganese tartrate in a muffle furnace at 2°C min -1 The heating rate was programmed to raise the temperature to 600 ° C for calcination, keep the temperature for 4 hours, and slowly cool to room temperature with the furnace temperature to obtain porous manganese trioxide.

[0023] Dissolve 150g of ammoni...

Embodiment 2

[0028] Soluble tartrate salt adopts potassium sodium tartrate tetrahydrate, and soluble manganese salt adopts manganese sulfate monohydrate, according to n(C 4 h 4 o 6 2- ):n(Mn 2+ )=1:1 ratio feeding, potassium sodium tartrate and manganese sulfate consumption are respectively 225g and 135g, and hydrothermal reaction temperature is 140 ℃, and the reaction times 24h, other is implemented as the same method among the embodiment 1.

[0029] The obtained strip-shaped porous manganese dioxide analysis result is similar to that of Example 1.

Embodiment 3

[0031] Soluble tartrate salt adopts potassium sodium tartrate tetrahydrate, and soluble manganese salt adopts manganese acetate tetrahydrate, according to n(C 4 h 4 o 6 2- ):n(Mn 2+ )=1.2: 1 ratio feeding, potassium sodium tartrate and manganese acetate consumption are respectively 271g and 196g, and the hydrothermal reaction temperature is 120 ℃, and the reaction times 8h, other is implemented in the same method as in embodiment 1.

[0032] The obtained strip-shaped porous manganese dioxide analysis result is similar to that of Example 1.

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Abstract

The invention discloses a porous manganese dioxide of nanofibre texture and a preparation method thereof. Hydro-thermal reaction is carried out on an aqueous solution containing Mn 2+ and an aqueous solution containing tartrate ion to firstly prepare micron-sized stripe-shaped manganese tartrate crystal; then, manganese tartrate is calcined under the controlled process condition to obtain porous manganese sesquioxide; and finally, oxidizing reaction is carried out on the manganese sesquioxide with a low-temperature hydrothermal method to synthetize porous manganese dioxide with nanofibre texture. The porous manganese dioxide of the invention is weaved by even nanofibre texture, which not only ensures larger specific surface area but also provides smooth high-porosity path for the chemical process to transfer mass. The composite method of the invention is different from the oxidizing atmosphere calcination synthesis method at high temperature; and products are synthetized at low temperature so as to totally avoid the disadvantage that manganese oxide is easy to sinter at high temperature, so that the products can keep the feature of a precursor and can realize the porous structure of the nanofibre texture.

Description

technical field [0001] The invention relates to a transition metal oxide nano material and a transition metal oxide porous material preparation technology, in particular to a porous manganese dioxide with a nanofiber texture and a preparation method thereof. Background technique [0002] Manganese dioxide is an important transition metal oxide and an important new functional material. Its low toxicity and low cost make it an ideal material in the new century. Manganese dioxide has shown good application prospects in the fields of catalyzing various oxidation reactions in organic synthesis, metal ion adsorption, lithium battery cathode materials, enzyme carriers in biosensors, and semiconductor materials. With the development of electronic technology and biotechnology in recent years, porous manganese dioxide materials have more and more important application requirements in the field of new functional materials. The performance of the material depends entirely on the struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02
Inventor 岳林海张宪忠
Owner ZHEJIANG UNIV
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