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Preparation method for graphene/activated carbon in-situ composite gel adsorbent for mouth mask

An in-situ composite and activated carbon technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve problems such as low porosity, easy agglomeration, difficult materials, etc., to achieve optimized pore Structure, the effect of strengthening the adsorption effect

Inactive Publication Date: 2018-11-13
张小伏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the graphene sheet structure is easy to agglomerate, a three-dimensional agglomerated material with very low porosity is formed.
However, many current patents and methods cannot effectively maintain or control the pore size of graphene, and can only be used for pollution adsorption such as dyes and organic solvents, and it is difficult to effectively use it as an air filter adsorption material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this embodiment, the preparation method of the graphene / activated carbon in-situ composite gel adsorbent for masks is as follows:

[0028] a. Grinding the activated carbon into 100 grams of 10 μm powder, then immersing it at room temperature into an aqueous solution of ammonia water with an alkaline reduction pore-forming solution of 18 mol / L for 20 minutes, and then filtering out the material;

[0029] b. Disperse the filtered activated carbon in 1 L of high-purity and high-concentration graphene oxide solution with a concentration of 1 g / L and a conductivity of 300 μs / cm. The dry weight ratio of graphene oxide to activated carbon is 1:100. Then be placed in the hydrothermal still that can be turned upside down, and the rotational speed of the hydrothermal still is 50 minutes a circle. The hydrothermal temperature is 180°C, and the hydrothermal time is 300min. After the reaction is completed, cool to room temperature;

[0030] c. Release water to obtain thermally r...

Embodiment 2

[0033] In this embodiment, the preparation method of the graphene / activated carbon in-situ composite gel adsorbent for masks is as follows:

[0034] a. Grinding the activated carbon into 100 grams of 10 μm powder, then immersing it in an aqueous solution of sodium carbonate with an alkaline reduction pore-forming solution of 18 mol / L at room temperature for 10 minutes, and then filtering out the material;

[0035] b. Disperse the filtered activated carbon in a 2L high-purity and high-concentration graphene oxide solution with a concentration of 2 g / L and a conductivity of 300 μs / cm. The dry weight ratio of graphene oxide to activated carbon is 1:60. Then be placed in the hydrothermal kettle that can be turned upside down, and the rotation speed of the hydrothermal kettle is 30 minutes. The hydrothermal temperature is 200°C, and the hydrothermal time is 360min. After the reaction is completed, cool to room temperature;

[0036] c. Release water to obtain thermally reduced grap...

Embodiment 3

[0039] In this embodiment, the preparation method of the graphene / activated carbon in-situ composite gel adsorbent for masks is as follows:

[0040] a. Grinding the activated carbon into 100 grams of powder of 10 μm, then immersing it into an aqueous solution of potassium carbonate with an alkaline reduction pore-forming solution of 18 mol / L at room temperature for 25 minutes, and then filtering out the material;

[0041] b. Disperse the filtered activated carbon in a 2L high-purity and high-concentration graphene oxide solution with a concentration of 1.5g / L and a conductivity of 300 μs / cm. The dry weight ratio of graphene oxide to activated carbon is 1:30. Then be placed in the hydrothermal kettle that can be turned upside down, and the rotation speed of the hydrothermal kettle is 20 minutes. The hydrothermal temperature is 210°C, and the hydrothermal time is 240min. After the reaction is completed, cool to room temperature;

[0042] c. Release water to obtain thermally red...

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Abstract

The invention belongs to the field of functional material preparation, and specifically discloses a graphene / activated carbon in-situ composite gel adsorbent for a mouth mask. A preparation method comprises the following steps: crushing activated carbon into powder being 10 mum or below, soaking the powder into alkaline reducing pore-forming liquid to be sufficiently absorbed and filter out a material; dispersing the filtered activated carbon into a high-purity high-concentration graphene oxide solution, putting into a hydrothermal reactor capable of rotating up and down, cooling after high-temperature hydrothermal reaction, and discharging water to obtain a thermally reduced graphene oxide / activated carbon in-situ composite gel adsorbent; then cleaning with pure water, and drying to obtain the final product. The preparation method is simple and environmentally friendly, and the product adsorption ability is excellent.

Description

technical field [0001] The invention belongs to the field of preparation of functional materials, in particular to a method for preparing a graphene / activated carbon in-situ composite gel adsorbent for masks. Background technique [0002] The mechanism of haze weather is very complicated, and its chemical composition is also very complicated, which may cause many diseases. At the same time, viruses, germs, etc. may attach to atmospheric particles and spread diseases. PM2.5 is the most harmful particulate matter among air pollutants. This particulate matter PM2.5 has a small particle size, is rich in a large amount of toxic and harmful substances, and has a long residence time in the atmosphere and a long transportation distance. Therefore, it is harmful to human health and Great impact on air quality. The most effective way to resist PM2.5 is to wear a mask, and the main functional part of the mask is the filter. The filtering effect of the filters on the market is uneven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30
CPCB01J20/20B01J20/28047
Inventor 张小伏
Owner 张小伏