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Preparation method and use of manganese dioxide having hollow structure

A manganese dioxide, hollow structure technology, applied in the direction of manganese oxide/manganese hydroxide, etc., can solve the problems of preparing manganese dioxide hollow spheres, which is difficult, and achieve good catalytic activity, good process repeatability, and uniform morphology. Effect

Active Publication Date: 2014-07-09
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] But in the absence of any template, surfactant or catalyst, it is difficult to prepare manganese dioxide hollow spheres under mild conditions

Method used

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  • Preparation method and use of manganese dioxide having hollow structure
  • Preparation method and use of manganese dioxide having hollow structure
  • Preparation method and use of manganese dioxide having hollow structure

Examples

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Embodiment 1

[0028] First, dissolve 2mmol of manganese sulfate, 2mmol of potassium persulfate and 2mmol of potassium sulfate in 15mL of distilled water, stir and dissolve completely to form solution A; while stirring the solution A, add concentrated sulfuric acid to solution A, stir well and form a mixed Solution B; wherein the volume ratio of concentrated sulfuric acid to the distilled water is 0.9:15; put the mixed solution B into a 25 mL autoclave, and place the autoclave at a temperature of 140°C for 12 hours Finally, the product was obtained; the product was washed several times with distilled water and absolute ethanol, and dried in a drying oven at 60° C. to obtain the manganese dioxide with the hollow structure. The product was identified as α-MnO by X-ray powder diffraction 2 ; Powder X-ray diffraction results such as figure 1 shown; the material morphology was obtained by transmission electron microscopy, such as figure 2 , image 3 As shown in the figure, it can be seen tha...

Embodiment 2

[0030] First, dissolve 2mmol of manganese sulfate, 1.6mmol of potassium persulfate and 2.4mmol of potassium sulfate in 15mL of distilled water, stir and dissolve completely to form solution A; while stirring the solution A, add concentrated sulfuric acid to the solution A, after stirring evenly A mixed solution B is formed; the volume ratio of concentrated sulfuric acid to the distilled water is 0.8:15; the mixed solution B is placed in a 25 mL autoclave, and the autoclave is placed in a temperature environment of 140°C for reaction The product was obtained after 24 hours; the product was washed several times with distilled water and absolute ethanol, and dried in a drying oven at 100° C. to obtain the manganese dioxide with the hollow structure. The obtained product is identified by X-ray powder diffraction and scanning electron microscope (similar to the manganese dioxide with a hollow structure prepared in Example 1), which shows that it is a manganese dioxide with a hollow ...

Embodiment 3

[0032] First, dissolve 2mmol of manganese sulfate, 2.2mmol of potassium persulfate and 1.8mmol of potassium sulfate in 15mL of distilled water, stir and dissolve completely to form solution A; while stirring the solution A, add concentrated sulfuric acid to the solution A, after stirring evenly A mixed solution B is formed; the volume ratio of concentrated sulfuric acid to the distilled water is 1:15; the mixed solution B is placed in a 25 mL autoclave, and the autoclave is placed in a temperature environment of 140°C for reaction The product was obtained after 12 hours; the product was washed several times with distilled water and absolute ethanol, and dried in a drying oven at 80° C. to obtain the manganese dioxide with the hollow structure. The obtained product is identified by X-ray powder diffraction and scanning electron microscope (similar to the manganese dioxide with a hollow structure prepared in Example 1), which shows that it is a manganese dioxide with a hollow str...

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Abstract

The invention discloses a preparation method and a use of manganese dioxide having a hollow structure. The preparation method of the manganese dioxide having the hollow structure comprises the following steps of dissolving manganese sulfate, potassium persulphate and potassium sulfate in distilled water, carrying out stirring for complete dissolution to obtain a solution A, stirring the solution A, meanwhile, adding concentrated sulfuric acid into the solution A, sequentially carrying out stirring to obtain a uniform mixed solution B, wherein a volume ratio of the concentrated sulfuric acid to the distilled water is 0.8-1: 15, putting the mixed solution B into a high-pressure reactor, putting the high-pressure reactor in an environment having a temperature of 140-180 DEG C, carrying out a reaction process for 6-24h, and carrying out washing and drying to obtain the manganese dioxide having a hollow structure. The preparation method utilizes easily available raw materials and has a low cost, simple and easy synthesis processes. The manganese dioxide product has stable quality and good technology repeatability. The manganese dioxide having a hollow structure can be used as a catalyst and has good catalytic activity to toluene catalytic combustion.

Description

technical field [0001] The invention relates to the field of inorganic material synthesis, in particular to a preparation method and application of manganese dioxide with a hollow structure. Background technique [0002] Manganese dioxide is an oxide with important industrial uses. Due to its unique structure, excellent performance and low cost, it has been widely used in secondary batteries, magnetic materials, catalysts, adsorbents and ion exchange. Due to the high specific surface area, low density, and the hollow part of the micro-nano hollow sphere can accommodate a large number of guest molecules or large-sized guests, it can produce some peculiar properties based on the microscopic "wrapping" effect, making the micro-nano hollow structure in the micro Scale reactors, drug delivery carriers and photonic crystals, biochemistry and chemical engineering and many other technical fields have important applications. For example, it has been reported in the German "Advanced ...

Claims

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Application Information

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IPC IPC(8): C01G45/02
Inventor 余林林婷程高孙明蓝邦成晓玲郑小颖
Owner GUANGDONG UNIV OF TECH
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