The activation of manganese dioxide and the preparation of manganese dioxide is urgent!

In theory, after heating KMNO4, filtering, K2Mno4 dissolved in water, green aqueous solution, MnO2 difficulty soluble in water, which can be separated from precipitation.You can also use acid potassium permanganate solutions to react with toluene. There will be black MNO2 precipitation
But in fact, I tried to make it, and the amount obtained is very small.It is better to buy.Suggest.
This answer hopes to be satisfied.
Activation method: Direct activation method is based on discharge manganese powder (natural manganese dioxide-ACMD) as raw materials, and uses dilute sulfuric acid (or nitric acid) to directly stop the activation measures, so that the original manganese dioxide transfers the crystal shape and expand the lattice leisure time.Add porosity and comparison area, so as to improve the electrification function and make it suitable for battery raw materials.The characteristics of this method are the chemical composition of the original manganese dioxide. The process is simple, the investment is small, and the cost is low.However, the quality and quality of raw ore quality and quality are high, and with the differences in the source of the mine, the nature of the product is different, which affects the stability of the quality of the product.

Research on the preparation of active manganese dioxide and the study of Asian Jiaji Blue color-Fan Quanxi
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The preparation of metal oxides can be used to precipitate, citric acid, etc., and thermal synthesis method of citric acid, and so on.