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Photothermal sponge, and preparation method and application thereof

A sponge and photothermal technology, applied in the direction of separation methods, chemical instruments and methods, sustainable manufacturing/processing, etc., can solve the problems of improving the thermal catalytic activity of metal oxides, the field of catalysis has not attracted enough attention, and is not suitable for air purification. , to achieve the effect of easy large-scale production, low production cost and rapid heat production

Inactive Publication Date: 2019-09-20
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the photothermal properties of graphene have been studied in the medical field, they have not attracted enough attention in the field of catalysis.
To the best of our knowledge, there have been no reports of exploiting the photothermal effect of graphene surfaces to improve the thermocatalytic activity of metal oxides.
[0004] As an efficient catalyst, manganese dioxide can thermally and catalytically decompose pollutants, such as benzene and toluene, into carbon dioxide and water, but the reaction requires a higher temperature and is not suitable for direct use in indoor air purification.
The porous structure of the carbon material itself determines that it can be used as an adsorption material for air purification. At present, the existing technology has not combined carbon materials and manganese dioxide to achieve efficient enrichment and photothermal decomposition of pollutants in the air. regenerative technology

Method used

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  • Photothermal sponge, and preparation method and application thereof
  • Photothermal sponge, and preparation method and application thereof
  • Photothermal sponge, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Dissolve 20mg of graphene water-based slurry in 20mL of water, sonicate in an ultrasonic instrument at 20°C for 15min, let it stand for 1min after the reaction, and take a cut 2×2×2cm 3 Soak the polyurethane sponge block in the above dispersion liquid, put it into an ultrasonic instrument at 20°C for 20 minutes, take it out and let it stand for observation. After the sponge absorbs no obvious change in color, take it out and dry it at 80°C. The SEM image of the obtained sample is attached Figure 4 a.

Embodiment 2

[0035] Dissolve 20mg of graphene dispersion in 20mL of water, sonicate in an ultrasonic instrument at 20°C for 15min, let it stand for 1min after the reaction, and take a cut 2×2×2cm 3 Soak the polyurethane sponge block in the above dispersion liquid, put it into an ultrasonic instrument at 20°C for 20 minutes, take it out and let it stand for observation. After the sponge absorbs no obvious change in color, take it out and dry it at 80°C. The SEM image of the obtained sample is attached Figure 4 b.

Embodiment 3

[0037] Dissolve 20mg of high-purity graphene in 20mL of water, sonicate in an ultrasonic instrument at 20°C for 15min, let it stand for 1min after the reaction, and take a cut 2×2×2cm 3 Soak the polyurethane sponge block in the above dispersion liquid, put it into an ultrasonic instrument at 20°C for 20 minutes, take it out and let it stand for observation. After the sponge absorbs no obvious change in color, take it out and dry it at 80°C. The SEM image of the obtained sample is attached Figure 4 c.

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Abstract

The invention relates to a photothermal sponge, a preparation method thereof and an application thereof in air purification. The method comprises the following steps: 1) dissolving a graphene material in water, and carrying out ultrasonic treatment to prepare a graphite dispersion solution with a certain concentration; 2) immersing the porous sponge in the graphite dispersion solution, and carrying out ultrasonic treatment to absorb the graphite dispersion solution; and 3) continuously adding permanganic acid or permanganate to the solution, controlling the concentration of the permanganate, the reaction temperature and the reaction time, and drying the obtained sample to obtain the sample. 1) the preparation method of the synthesized photothermal sponge has the advantages of simple preparation process, low production cost, and easiness in large-scale production; 2) the photothermal sponge has an excellent characteristic of adsorbing toluene in indoor air, and can be reused; and 3) the porous structure of the sponge can enhance the scattering and absorption of light in pores, so solar energy is efficiently utilized, and heat is rapidly produced.

Description

technical field [0001] The invention belongs to the technical field of chemical catalytic decomposition, and in particular relates to a photothermal sponge, a preparation method and its application in air purification. Background technique [0002] As the main place for human activities (people spend more than 80% of their time indoors), the comfort and safety of the indoor environment has attracted more and more attention. Formaldehyde and toluene in indoor air have become the primary gaseous pollutants concerned because of their ubiquity and carcinogenicity. Severe indoor environmental pollution not only causes loss to people's health, but also causes huge economic loss. It is urgent to find a way to solve air pollution. Traditional adsorption and absorption control technologies transfer pollutants from the gas phase to the solid or liquid phase, but have not achieved true removal, and the adsorption materials are easily saturated and need to be replaced regularly, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40B01D53/86B01D53/72C08L75/04C08L61/28
CPCB01D53/007B01D53/8668C08J9/40C08J2361/28C08J2375/04Y02P20/50
Inventor 王金龙夏怡田邹楠谢雅凡
Owner WUHAN UNIV OF TECH
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