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Method of preparing Mn3O4 porous materials

A porous material, 5min technology, applied in manganese oxide/manganese hydroxide and other directions, can solve the problems of porous structure collapse cost, porous materials are not widely reported, etc., to achieve low cost, easy large-scale synthesis, good crystallinity effect

Active Publication Date: 2013-12-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, removal of these organic molecules leads to collapse of the porous structure and increased cost
At present, using a template-free method, the synthesis of Mn 3 o 4 methods for porous materials have not been widely reported

Method used

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  • Method of preparing Mn3O4 porous materials
  • Method of preparing Mn3O4 porous materials
  • Method of preparing Mn3O4 porous materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Dissolve 1.1 g manganese acetate dihydrate in 30 ml ethanol, then add 0.8 ml formic acid, stir until uniform to obtain a suspension.

[0017] 2) Transfer the suspension to a solvothermal device, perform a solvothermal reaction at 150 °C for 6 h, then centrifuge the obtained material, and then dry it at 80 °C.

[0018] 3) Heat the dried powder at 200°C for 12 h to obtain Mn 3 o 4 porous material.

[0019] Prepared Mn 3 o 4 The X-ray diffraction pattern of the porous material is shown in Figure 1, and its diffraction peaks are similar to those of hausmannite Mn 3 o 4 The standard spectrum is consistent, indicating that the obtained product is black manganese ore Mn 3 o 4 . Calculated by Scherrer's formula, the average crystal diameter is 20 nm. Figure 2 shows the Mn prepared in this example 3 o 4 Scanning electron micrographs of porous materials. It can be seen from the figure that Mn 3 o 4 Porous materials have a large number of mesoporous and macropo...

Embodiment 2

[0021] 1) Dissolve 1.1 g manganese acetate dihydrate in 30 ml ethanol, then add 0.8 ml formic acid, stir until uniform to obtain a suspension.

[0022] 2) The suspension was centrifuged, and the resulting substance was dried at 80°C.

[0023] 3) Heat the dried powder at 200°C for 12 h to obtain Mn 3 o 4 porous material.

[0024] Prepared Mn 3 o 4 SEM images of porous materials such as Figure 4 shown. It can be seen from the figure that the prepared Mn 3 o 4 The porous material is ellipsoidal, and a large number of pore structures are distributed on the sphere.

Embodiment 3

[0026] 1) Dissolve 1.1 g of manganese acetate dihydrate in 30 ml of methanol, then add 1 ml of formic acid, stir until uniform to obtain a suspension.

[0027] 2) Transfer the suspension to a solvothermal device, perform a solvothermal reaction at 170 °C for 12 h, then centrifuge the obtained material, and then dry it at 80 °C.

[0028] 3) Heat the dried powder at 400°C for 3 h to obtain Mn 3 o 4 porous material.

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Abstract

The invention discloses a method of preparing Mn3O4 porous materials. Firstly, manganese triacetate dihydrate is dissolve in an organic solvent, then formic acid is added, and a suspension is obtained; the suspension is centrifuged and dried, and alternatively, the suspension is transferred into a solvothermal device, solvothermal reaction is conducted, and the obtained product is centrifuged and dried; then thermal treatment is conducted, and the Mn3O4 porous materials are obtained. The method does not need templates, and is simple in process and low in cost, and the Mn3O4 porous materials prepared in the method are good in crystallinity.

Description

technical field [0001] The present invention relates to a kind of preparation Mn 3 o 4 methods for porous materials. Background technique [0002] Manganese oxide has a wide range of applications in electrochemical materials, catalysis, ion exchange, adsorption and other fields, and has received more and more attention in recent years. mn 3 o 4 It is the most stable crystal form in the manganese oxide system. mn 3 o 4 NO x Catalysts with CO and CO have important applications in the treatment of automobile exhaust and industrial waste gas. In addition, Mn 3 o 4 It is a promising electrochemical material and is expected to be used in lithium-ion batteries and supercapacitors. [0003] Using hydrothermal method, solvothermal method, microemulsion, hot injection method, etc., researchers have synthesized many kinds of Mn 3 o 4 Nano-structure. In order to regulate the growth of nanostructures and form pore structures, it is often necessary to introduce organic molec...

Claims

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Application Information

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IPC IPC(8): C01G45/02
Inventor 赵高凌何凯韩高荣
Owner ZHEJIANG UNIV
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