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A preparation method of micronano-silver-loaded activated carbon for long-term elimination of formaldehyde at room temperature

A technology for micro-nano silver and formaldehyde elimination, applied in catalyst activation/preparation, separation methods, chemical instruments and methods, etc., can solve the problem of high reaction temperature, achieve high decomposition rate, stable performance, increase adsorption rate and adsorption capacity. Effect

Active Publication Date: 2018-06-29
JUYILE ENVIRONMENTAL PROTECTION TECH SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The Ag catalyst system can also decompose formaldehyde at a certain temperature, but the reaction temperature is too high, and the carrier used is mostly CeO 2 , molecular sieve, SiO 2 , MnO 2 、TiO 2 Wait

Method used

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  • A preparation method of micronano-silver-loaded activated carbon for long-term elimination of formaldehyde at room temperature
  • A preparation method of micronano-silver-loaded activated carbon for long-term elimination of formaldehyde at room temperature
  • A preparation method of micronano-silver-loaded activated carbon for long-term elimination of formaldehyde at room temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Put the Φ20mm and 50mm long honeycomb-formed activated carbon in ultrapure water and ultrasonically clean it three times (put the activated carbon into ultrapure water and clean it fully with an ultrasonic cleaner), and dry it at 60°C; Put it in 15% ammonia solution at a ratio of 5, take it out after soaking at room temperature for 1 hour, and dry it at 80°C; prepare a silver nitrate aqueous solution with a silver ion concentration of 100ppm, and use the mass ratio of activated carbon to silver nitrate aqueous solution as 1:100 Immerse the activated carbon in the silver nitrate aqueous solution, soak it at room temperature for 6 hours, take it out and dry it at 100°C. Wherein the loading amount of micro-nano silver is 0.0005% (wt).

[0045] The formaldehyde purification performance of the prepared activated carbon was evaluated according to the aforementioned test conditions. At 25°C, the initial purification rate of formaldehyde was 100%. After 130 minutes, formaldehyd...

Embodiment 2

[0047] Put Φ20mm, length 50mm honeycomb-formed activated carbon in ultrapure water, ultrasonically clean it three times, and dry it at 80°C; place the cleaned activated carbon in 15% ammonia solution at a mass ratio of 1:10, and store it at room temperature Take it out after soaking for 24 hours, and dry it at 80°C; prepare a silver nitrate aqueous solution with a silver ion concentration of 70ppm, and impregnate the activated carbon in the silver nitrate aqueous solution with a mass ratio of activated carbon and silver nitrate aqueous solution of 1:50, and take it out after immersing for 48 hours at room temperature Dry at 60°C. Wherein the loading amount of micro-nano silver is 0.01% (wt).

[0048] The formaldehyde purification performance of the prepared activated carbon was evaluated according to the aforementioned test conditions. The initial purification rate of formaldehyde was 100% at 25°C. After 17 hours, formaldehyde began to penetrate, and after 75 hours, the formal...

Embodiment 3

[0050] Put the Φ20mm and 50mm long honeycomb-formed activated carbon in ultrapure water, ultrasonically clean it three times, and dry it at 80°C; place the cleaned activated carbon in 28% ammonia solution with a mass ratio of 1:20, and soak it at room temperature Take it out after 4 hours, and dry it at 100°C; prepare a silver nitrate aqueous solution with a silver ion concentration of 100ppm, and impregnate the activated carbon in the silver nitrate aqueous solution with a mass ratio of activated carbon and silver nitrate aqueous solution of 1:100, and take out 100 ℃ drying. Wherein the loading amount of micro-nano silver is 0.03% (wt).

[0051] The prepared activated carbon was evaluated for formaldehyde purification performance according to the aforementioned test conditions. The breakthrough curve of activated carbon for formaldehyde purification is shown in the attached figure 2 As shown, the initial purification rate of formaldehyde is 100% at 25°C, formaldehyde begins...

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Abstract

The invention relates to the field of air purification materials, in particular to a method for preparing micronano silver-loaded activated carbon for long-term elimination of formaldehyde at room temperature. The invention provides a method for preparing micronano silver-loaded activated carbon for long-term elimination of formaldehyde at room temperature, comprising the following steps: cleaning the activated carbon, ammonia water impregnation modification, and loading micronano silver. Compared with the prior art, the formaldehyde purification material of the present invention is prepared by using activated carbon cleaned with ultrapure water and treated with ammonia water as a carrier, loaded with micro-nano silver active components, and utilizing the adsorption and reduction properties of activated carbon, micro-nano silver The catalytic oxidation performance of formaldehyde and the synergistic mechanism of enrichment and transformation between micro-nano silver and activated carbon make the catalytic oxidation of formaldehyde by micro-nano silver-loaded activated carbon have a high decomposition rate and stable performance.

Description

technical field [0001] The invention relates to the field of air purification materials, in particular to a method for preparing micronano silver-loaded activated carbon for long-term elimination of formaldehyde at room temperature. Background technique [0002] With the improvement of people's material living standards and the enhancement of environmental protection awareness, people's requirements for air quality are getting higher and higher. Indoor air pollution poses a serious threat to human life and health. The main pollutants brought by decoration are formaldehyde, benzene, toluene, radon, etc., which are continuously volatilized and released for as long as 5 to 15 years or even longer. Formaldehyde is one of the main pollutants in indoor and car air. It is a colorless gas with a strong pungent smell. It is easily volatilized from decoration materials and furniture at room temperature. There are many pollution sources and high pollutant concentrations. . The lot o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/50B01J37/02B01D53/86B01D53/72
Inventor 赵斌元王垒甘琦周洁赖奕坚
Owner JUYILE ENVIRONMENTAL PROTECTION TECH SHANGHAI
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