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A high-purity large surface specific area ε-mno 2 hydrothermal synthesis method

A technology of hydrothermal synthesis and hydrothermal kettle, which is applied in the field of hydrothermal synthesis of ε-MnO2, can solve the problems of short life, secondary pollution, untimely filter replacement, etc., and achieve excellent performance, simplified treatment, and good formaldehyde degradation active effect

Active Publication Date: 2022-03-15
GUANGDONG MIDEA WHITE HOME APPLIANCE TECH INNOVATION CENT CO LTD +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the odor purification in air purification products still adopts activated carbon filter to absorb, its life is short and often causes secondary pollution because the filter is not replaced in time

Method used

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  • A high-purity large surface specific area ε-mno <sub>2</sub> hydrothermal synthesis method
  • A high-purity large surface specific area ε-mno <sub>2</sub> hydrothermal synthesis method
  • A high-purity large surface specific area ε-mno <sub>2</sub> hydrothermal synthesis method

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preparation example Construction

[0031] A ε-MnO 2 The hydrothermal synthesis method comprises the following operations:

[0032] 1) Prepare a permanganate aqueous solution with a concentration of 2g / (50-200mL);

[0033] 2) placing the permanganate aqueous solution in a hydrothermal kettle, and performing hydrothermal synthesis reaction at 150-250°C;

[0034] 3) After the reaction is completed, the solid and liquid are separated to obtain ε-MnO 2 .

[0035] In the process of hydrothermal synthesis, the metathesis reaction of permanganate occurs to generate -MnO 2 .

[0036] In some examples of hydrothermal synthesis methods, the concentration of the permanganate aqueous solution is 2 g / (100-200 mL). This concentration can get ε-MnO with higher purity 2 .

[0037] In some examples of the hydrothermal synthesis method, the reaction temperature of the hydrothermal synthesis is 150-200°C.

[0038] In some examples of the hydrothermal synthesis method, the reaction time of the hydrothermal synthesis is 10-1...

Embodiment 1

[0048] 1) Prepare a permanganate aqueous solution with a concentration of 2g / 200mL;

[0049] 2) Put the permanganate aqueous solution in a hydrothermal kettle, and carry out a hydrothermal synthesis reaction at 150° C. for 12 hours;

[0050] 3) After the reaction is completed, the solid and liquid are separated to obtain ε-MnO 2 .

[0051] figure 1 It is the ε-MnO synthesized in Example 1 2 The XRD pattern. It can be seen from the figure that the prepared ε-MnO 2 .

Embodiment 2

[0053] 1) preparation concentration is the permanganate aqueous solution of 2g / 100mL;

[0054] 2) Put the aqueous permanganate solution in a hydrothermal kettle, and conduct a hydrothermal synthesis reaction at 200° C. for 15 hours;

[0055] 3) After the reaction is completed, the solid and liquid are separated to obtain ε-MnO 2 .

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Abstract

The invention discloses a ε-MnO 2 By controlling the temperature of the hydrothermal reaction and the concentration of potassium permanganate, ε-MnO with very high specific surface area and crystalline purity was prepared unexpectedly 2 , compared with other manganese dioxide on the market, it can degrade formaldehyde efficiently.

Description

technical field [0001] The invention relates to a preparation method of a material, in particular to an ε-MnO 2 hydrothermal synthesis method. Background technique [0002] Formaldehyde is one of the most important indoor pollutants, mainly from various wood-based panels and interior decoration materials. At present, the odor purification in air purification products is still absorbed by activated carbon filters, which have a short life and often cause secondary pollution due to untimely replacement of filters. Therefore, it is of great significance to develop catalysts that can catalyze and oxidize pollutants such as formaldehyde in the air into water and carbon dioxide, and can be successfully applied in home appliances or fresh air systems to achieve high-efficiency purification of indoor air without consumables. [0003] Manganese dioxide is a well-known substance capable of removing formaldehyde at room temperature, and is widely used in the preparation of formaldehyd...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/02
CPCC01G45/02C01P2006/80C01P2006/12C01P2004/61C01P2002/72
Inventor 杨翠霞代光剑熊玉明
Owner GUANGDONG MIDEA WHITE HOME APPLIANCE TECH INNOVATION CENT CO LTD
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