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Green preparation method of manganese dioxide

A manganese dioxide, green technology, applied in the direction of manganese oxide/manganese hydroxide, etc., can solve the problems of environmental protection and energy saving, and achieve the effect of mild conditions, easy operation and energy saving

Active Publication Date: 2017-12-22
HUANGSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the preparation methods of manganese dioxide introduced in most literatures do not meet the requirements of environmental protection and energy saving, it is an urgent problem to develop a green preparation method of manganese dioxide.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0056] The preparation of potassium permanganate solution: the potassium permanganate consumption in the above-mentioned embodiment 1 is changed to 0.6360g, other conditions are constant, carry out experiment;

[0057] The preparation of manganese dioxide: change the amount of pollen in the above-mentioned embodiment 1 to 0.3g, and keep other conditions unchanged, carry out the experiment, and the black intermediate powder product obtained is designated as sample 2.

Embodiment 3

[0059] The preparation of potassium permanganate solution: the potassium permanganate consumption in the above-mentioned embodiment 1 is changed to 0.64g, other conditions are constant, carry out experiment;

[0060] Preparation of manganese dioxide: change the amount of pollen in the above-mentioned embodiment 1 to 0.4g, and keep other conditions constant, carry out the experiment, and the obtained black intermediate powder product is designated as sample 3.

[0061] 3.4 Embodiment 4

[0062] The preparation of potassium permanganate solution: the potassium permanganate consumption in the above-mentioned embodiment 1 is changed to 0.6360g, other conditions are constant, carry out experiment;

[0063] Preparation of manganese dioxide: the reaction temperature in the above-mentioned embodiment 1 was adjusted to 40° C., and other conditions were kept constant, and the experiment was carried out, and the obtained black intermediate powder product was designated as sample 4.

[006...

Embodiment 7

[0070] A part of sample 2 obtained in Example 2 was calcined, and the temperature was raised to 500° C. in a muffle furnace at a rate of 5° C. / min for 3.5 hours. After cooling, it was ground to obtain a black final product, which was designated as sample 7.

[0071] 3.8 Embodiment 8

[0072] A part of sample 2 obtained in Example 2 was calcined, and the temperature was raised to 600° C. in a muffle furnace at a rate of 5° C. / min for 2.5 hours. After cooling, it was ground to obtain a black final product, which was designated as sample 8.

[0073] The samples obtained in the above examples were verified by ultraviolet spectrum and scanning electron microscope tests respectively.

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Abstract

The invention relates to a green preparation method of manganese dioxide. The preparation method comprises the following steps: adding a potassium permanganate solution into a pollen suspension to react; after the reaction, filtering, and washing filter residues; drying and crushing the filter residues, and obtaining an intermediate powder product; calcining the intermediate powder product to obtain a final product manganese dioxide. Pollen is adopted as a reducing agent and a biological template, and the potassium permanganate is used as a manganese source to prepare manganese dioxide microcrystals. The pollen can play a role of the reducing agent in the generation of the manganese dioxide, and the pollen and a special granular structure thereof also play a role of the template in generating the manganese dioxide particles. The obtained manganese dioxide product is adopted to photocatalytically degrade malachite green dye, and the catalytic performance is good. The green preparation method is simple in operation, moderate in condition, energy-saving and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of manganese dioxide preparation, and in particular relates to a green preparation method of manganese dioxide. Background technique [0002] In recent years, manganese dioxide, as an important industrial material, has been widely used in supercapacitors, catalysis, adsorption, and composite materials. The preparation methods of manganese dioxide mainly include hydrothermal synthesis method, chemical precipitation method, sol-gel method, template method and so on. With the continuous development of the economy and society, people are worried about environmental problems, among which various pollution problems caused by the chemical industry are particularly prominent. There are also many disadvantages in the existing preparation methods of manganese dioxide. For example, the hydrothermal synthesis method needs high temperature and high pressure acidic environment, the chemical precipitation method needs rep...

Claims

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Application Information

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IPC IPC(8): C01G45/02
CPCC01G45/02C01P2002/84C01P2004/03C01P2004/61
Inventor 陈龙周权计琳晔蒋婉君蒋诚梅吴敏敏王麟凤
Owner HUANGSHAN UNIV
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