A kind of preparation method and application of manganese dioxide with hollow structure
A manganese dioxide, hollow structure technology, applied in manganese oxide/manganese hydroxide and other directions, can solve problems such as difficulty in preparing manganese dioxide hollow spheres, and achieve good process repeatability, good catalytic activity, and stable product quality. Effect
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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 25mL autoclave, and place the autoclave at 140°C for 12 hours to react The product was obtained; the product was washed several times with distilled water and absolute ethanol, and dried in a 60°C drying oven 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 that the material is a holl...
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 Form a mixed solution B; wherein the volume ratio of concentrated sulfuric acid to the distilled water is 0.8:15; put the mixed solution B into a 25mL autoclave, and place the autoclave at a temperature of 140°C for 24 The product was obtained after one hour; 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 structure.
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 25mL autoclave, and the autoclave is placed in a temperature environment of 140°C for 12 The product was obtained after one hour; 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 structure....
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