Preparation method for manganese dioxide hollow sphere

A manganese dioxide and hollow sphere technology is applied in the field of materials, which can solve the problems of affecting performance, cumbersome process, structural damage, etc., and achieve the effects of low production cost, simple process steps and mild reaction conditions.

Inactive Publication Date: 2010-01-13
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method for synthesizing manganese dioxide hollow spheres is mainly the template method. In the preparation process, the core-shell structure is first prepared by using silica spheres, micelles, polystyrene spheres, etc. as templates, and then removed by calcination or etching. The template is manganese dioxide hollow spheres. During the process of removing the template, its structure will be destroyed to a certain extent and its performance will be affected.
Moreover, the process of preparing templates and removing templates is cumbersome. Therefore, it is of great significance to develop template-free synthesis of manganese dioxide hollow spheres.

Method used

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  • Preparation method for manganese dioxide hollow sphere
  • Preparation method for manganese dioxide hollow sphere
  • Preparation method for manganese dioxide hollow sphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Taking 0.5mmol of the raw material manganese sulfate used for preparing manganese dioxide hollow spheres as an example, other raw materials used and their proportioning and preparation methods are as follows:

[0041] 1. Weigh 0.0845g manganese sulfate, 0.474g potassium permanganate, 0.054g FeCl 3 ·6H 2 O, join in the hydrothermal reaction kettle, add 14mL deionized water and fully stir to make manganese sulfate, potassium permanganate and FeCl 3 ·6H 2 O dissolved, then add 1ml of sulfuric acid, that is manganese sulfate and potassium permanganate, FeCl 3 ·6H 2 O, the molar ratio of sulfuric acid is 1: 6: 0.4: 36.8. The manganese sulfate and sulfuric acid used were of analytical grade.

[0042] 2. Put the hydrothermal reaction kettle in an oven at a constant temperature of 150°C for hydrothermal reaction for 20 minutes, and naturally cool to room temperature.

[0043] 3. The product obtained in step 2 was washed with deionized water for 5 times, and dried in an ov...

Embodiment 2

[0046] Taking 0.5mmol of the raw material manganese sulfate used for preparing manganese dioxide hollow spheres as an example, other raw materials used and their proportioning and preparation methods are as follows:

[0047] In step 1, weigh 0.0845g manganese sulfate, 0.474g potassium permanganate, 0.0054g FeCl 3 ·6H 2 O was added to the hydrothermal reaction kettle, and 14 mL of deionized water was added and stirred fully to make manganese sulfate, potassium permanganate and FeCl 3 ·6H 2 O dissolved, then add 1ml of sulfuric acid, that is manganese sulfate and potassium permanganate, FeCl 3 ·6H 2 O, the molar ratio of sulfuric acid is 1: 6: 0.04: 36.8. The other steps are the same as in Example 1, and manganese dioxide hollow spheres are prepared. The morphology of the prepared manganese dioxide hollow spheres was observed with a scanning electron microscope, and the scanning electron microscope photos are shown in Figure 5 . Depend on Figure 5 It can be seen that i...

Embodiment 3

[0049] Taking 0.5mmol of the raw material manganese sulfate used for preparing manganese dioxide hollow spheres as an example, other raw materials used and their proportioning and preparation methods are as follows:

[0050] In step 1, weigh 0.0845g manganese sulfate, 0.474g potassium permanganate, 0.135g FeCl 3 ·6H 2 O was added to the hydrothermal reaction kettle, and 14 mL of deionized water was added and stirred fully to make manganese sulfate, potassium permanganate and FeCl 3 ·6H 2 O dissolved, then add 1ml of sulfuric acid, that is manganese sulfate and potassium permanganate, FeCl 3 ·6H 2 O, the molar ratio of sulfuric acid is 1: 6: 1: 36.8. The other steps are the same as in Example 1, and manganese dioxide hollow spheres are prepared. The morphology of the prepared manganese dioxide hollow spheres was observed with a scanning electron microscope, and the scanning electron microscope photos are shown in Image 6 . Image 6 It can be seen that when the amount of...

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Abstract

The invention relates to a preparation method for a manganese dioxide hollow sphere, which is as follows: manganese sulfate, potassium permanganate and soluble ferric salt are weighed and added into a hydrothermal reactor; deionized water is added till manganese sulfate, potassium permanganate and soluble ferric salt are dissolved; the mixed liquor is fully mixed and added with sulfuric acid; the molar ratio of manganese sulfate, potassium permanganate, soluble ferric salt and sulfuric acid are 1:6:0.04-1:36.8; the hydrothermal reactor is put in a baking oven, hydrothermally reacted for 10 to 1440 minutes in the constant temperature of 130 to 180 DEG C and naturally cools to the room temperature; the prepared product is washed for five times by deionized water, and dried in the 50 DEG C of the air of the drying oven to prepare manganese dioxide hollow sphere. The prepared manganese dioxide hollow sphere is tested by an x-ray diffraction instrument, a scanning electron microscope and a transmission electron microscope, has spherical appearance, big cavity, about 3mu m p grain size distribution, big specific surface area, and can be used as electrode material and battery material of a super capacitor.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to manganese dioxide hollow sphere materials. Background technique [0002] Manganese dioxide has attracted increasing attention from researchers based on its applications in catalysis, ion exchange, and energy storage materials such as supercapacitors. The morphology of manganese dioxide material affects its properties to a great extent, and manganese dioxide hollow sphere material has become a hot and difficult research point because of its particularity and complexity of structure. At present, the method of synthesizing manganese dioxide hollow spheres is mainly the template method. In the preparation process, the core-shell structure is first prepared by using silica spheres, micelles, polystyrene spheres, etc. as templates, and then removed by calcination or etching. The template is manganese dioxide hollow spheres, and its structure will be destroyed to a certai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02H01G9/04
CPCY02E60/13
Inventor 刘宗怀何学侠
Owner SHAANXI NORMAL UNIV
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