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A kind of nano manganese dioxide sponge and its preparation method and application

A technology of nano-manganese dioxide and manganese dioxide sponge, which is applied in chemical instruments and methods, catalyst activation/preparation, separation methods, etc., can solve the problems of difficulty in improving catalytic activity and low loading capacity, and achieve improved catalytic degradation of formaldehyde ability, enhance catalytic activity, and improve catalytic performance

Active Publication Date: 2021-05-14
SOUTH CHINA UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these materials all face the problem that the loading capacity is not high, which makes it difficult to improve the catalytic activity.

Method used

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  • A kind of nano manganese dioxide sponge and its preparation method and application
  • A kind of nano manganese dioxide sponge and its preparation method and application
  • A kind of nano manganese dioxide sponge and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The melamine nanosponge substrate is ethanol activated and dried. Weigh 3g of potassium permanganate and 5.6g of sodium oxalate into a reaction bottle, add 100ml of distilled water, mix well to obtain a reaction solution Ⅰ, put the nano-sponge cut to a weight of 0.3g into the reaction solution Ⅰ for 20 minutes, and then soak the The final nano-sponge is put into a 50ml reaction kettle I (containing 20ml water), and after 120°C stirring hydrothermal reaction for 4 hours, the nano-manganese dioxide sponge initially grown in situ is obtained. After soaking, the remaining reaction solution II is used again. Liquid II soaked the nano-manganese dioxide sponge initially grown in situ for 20 minutes, and then put it into the 50ml reaction kettle I again, stirred and hydrothermally reacted at 120°C for 7 hours, and then cooled naturally to room temperature. Soak the reacted composite material in deionized water for 30 minutes, pour out the water, repeat the operation 4 times, pu...

Embodiment 2

[0040]The melamine nanosponge substrate is ethanol activated and dried. Weigh 4g of sodium permanganate and 1.6g of potassium oxalate into a reaction bottle, add 150ml of distilled water, mix well to obtain a reaction solution Ⅰ, put the nano-sponge cut to a weight of 0.3g into the reaction solution Ⅰ for 20 minutes, and then soak The final nano-sponge is put into a 50ml reaction kettle I (containing 20ml water), and after 120°C stirring hydrothermal reaction for 4 hours, the nano-manganese dioxide sponge initially grown in situ is obtained. After soaking, the remaining reaction solution II is used again. Liquid II soaked the nano-manganese dioxide sponge initially grown in situ for 20 minutes, and then put it into the 50ml reaction kettle I again, stirred and hydrothermally reacted at 120°C for 7 hours, and then cooled naturally to room temperature. Soak the reacted composite material in deionized water for 30 minutes, pour out the water, repeat the operation 4 times, put it ...

Embodiment 3

[0042] The melamine nanosponge substrate is ethanol activated and dried. Weigh 2g of sodium permanganate, 2g of potassium permanganate, 1g of potassium oxalate, and 1g of ammonium oxalate into a reaction flask, add 150ml of distilled water, mix well to obtain reaction solution I, and put the nano-sponge cut to a weight of 0.3g into the reaction flask. Soak in solution Ⅰ for 20 minutes, then put the soaked nano-sponge into 50ml reaction kettle Ⅰ (containing 20ml water), stir and hydrothermally react at 100°C for 5 hours, and obtain a preliminary in-situ grown nano-manganese dioxide sponge. Finally, the remaining reaction solution II was used to soak the initially in-situ grown nano-manganese dioxide sponge in the reaction solution II again for 20 minutes, and then put it into the 50ml reaction kettle I again, stirred and hydrothermally reacted at 100°C for 5 hours, and then cooled naturally to room temperature. Soak the reacted composite material in distilled water for 30 minut...

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Abstract

The invention discloses a nano manganese dioxide sponge, a preparation method and application thereof. The method comprises the following steps: (1) adding permanganate and oxalate into water to obtain reaction solution I; (2) adding nano sponge to reaction solution I, soaking, taking out and submerging in water at 80-120°C Heat reaction for 2 to 7 hours to obtain the initially in-situ grown nano-manganese dioxide sponge, and leave the reaction solution II after soaking; (3) soak the initially in-situ-grown nano-manganese dioxide sponge in the reaction solution II again, take it out and Hydrothermal reaction at 80-120°C for 5-12 hours, purification to obtain nano-manganese dioxide sponge. The present invention uses 3D nano-sponge as a template to efficiently load nano-manganese dioxide. The preparation process is simple, the material utilization rate is high, and the loading rate is as high as 220%. The prepared catalytic material can effectively degrade low-concentration formaldehyde (1.4ppm). The rate is as high as 90%.

Description

technical field [0001] The invention belongs to the technical field of nano-catalysis, and in particular relates to a nano-manganese dioxide sponge and its preparation and application. Background technique [0002] Formaldehyde (formaldehyde) is a recognized carcinogenic and teratogenic pollutant, which can reduce the body's resistance and cause chronic respiratory diseases, especially for pregnant women and children. Formaldehyde is known as the main indoor air pollutant in airtight buildings, which is continuously released from furniture, construction materials and household products. Formaldehyde is a typical pollutant in indoor and outdoor air. Even if it contains 0.5ppm formaldehyde, long-term exposure to the air will cause adverse effects on human health. However, the removal of indoor low-concentration formaldehyde is still a challenging problem. [0003] In order to reduce the concentration of formaldehyde in the air, many technologies have been developed. There a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/32B01J37/10B01D53/86B01D53/72
CPCB01J31/32B01J37/10B01D53/8668B01D2257/704B01D2259/4508B01J35/23
Inventor 肖凯军谌凯银玉容陈险峰陈俊岭彭元
Owner SOUTH CHINA UNIV OF TECH
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