Preparation method of three-dimensional modified graphene filter screen

A graphene and modification technology, applied in the field of preparation of three-dimensional modified graphene filter screen, can solve problems such as poor practicability, and achieve the effects of enhanced adsorption surface area, environmental friendliness, and simple preparation process

Inactive Publication Date: 2017-08-04
中山市天美能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing purification principle of catalytic oxidation type generally needs to occur under specific conditions, such as ultraviolet radiation or high temperature, etc., and the practicability is not strong. Therefore, the present invention provides a three-dimensional modification that can catalytically decompose formaldehyde at room temperature. The preparation method of permanent graphene filter is used to solve this problem

Method used

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  • Preparation method of three-dimensional modified graphene filter screen

Examples

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preparation example Construction

[0022] The present invention is a kind of preparation method of three-dimensional modified graphene filter net, comprises the following steps:

[0023] a. Prepare foam metal;

[0024] b. Remove impurities and oxide layers on the surface of the foam metal by soaking in acid solution;

[0025] c. Use cobalt salt, nickel salt, graphene and water to form a solution as a dipping reagent;

[0026] d, soaking the metal foam through step b in the dipping reagent;

[0027] e. Drying the metal foam through step d;

[0028] f. Carrying out high-temperature heat treatment to the metal foam after step e, to decompose the cobalt salt and nickel salt loaded on the surface of the metal foam to obtain their composite oxides.

[0029] The method of the present invention first removes surface impurities and oxide layers, then performs solution dipping, and then dries, and coats the cobalt-nickel oxide active material and graphene on the surface of the foam metal to enhance the adsorption surf...

Embodiment example 1

[0035] A preparation method for a three-dimensional modified graphene filter, comprising the following steps:

[0036] 1) Take 6×6cm nickel foam and soak it in 0.05mol / L hydrochloric acid solution for 24 hours;

[0037] 2) Prepare 50ml of nickel acetate and cobalt acetate with a mixing molar ratio of 1:5, add 1wt% graphene, (nickel acetate mole is 1mmol, cobalt acetate mole is 5mmol);

[0038] 3) Ultrasonic immersion in the mixed solution for 0.5 minutes, take it out, and dry it in an oven at 80°C for one hour;

[0039] 4) heat-treating the nickel foam obtained in step 3) at 400° C. for 3 hours in an air atmosphere.

[0040] The three-dimensional modified graphene filter prepared in Example 1 was tested for its formaldehyde removal performance, and the results obtained are shown in Table 1 below.

Embodiment example 2

[0042] A method for preparing a three-dimensional modified graphene filter, comprising the following steps:

[0043] 1) Take 6×6cm foam nickel and soak it in 0.5mol / L hydrochloric acid solution for 2 hours;

[0044] 2) Prepare 50ml of nickel acetate and cobalt acetate with a mixing molar ratio of 1:0.1 (1 mmol of nickel acetate and 0.1 mmol of cobalt acetate) and add 1wt% graphene;

[0045] 3) Ultrasonic immersion in the mixed solution for 6 minutes, take it out, and dry it in an oven at 100°C for 1 hour;

[0046] 4) heat-treating the foamed nickel obtained in step 3) at 420° C. for 3 hours in an air atmosphere, and cobalt-nickel oxide is formed on the surface of the foamed nickel;

[0047] The three-dimensional modified graphene filter prepared in Example 2 was tested for its formaldehyde removal performance, and the results obtained are shown in Table 1 below.

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Abstract

The invention discloses a preparation method of a three-dimensional modified graphene filter screen. The preparation method comprises the following steps: treating a porous foamed metal serving as a substrate in a 0.05-0.5mol/L of inorganic acid (such as hydrochloric acid, nitric acid and sulfuric acid) for 3-24 hours, preparing an aqueous solution of cobalt salt plus nickel salt (comprising carbonate, bicarbonate, oxalate, formate, acetate, propionate and oxalate), wherein the mixed molar ratio of the cobalt salt to the nickel salt is 1: (0.1-5), adding 0.5-5wt% of graphene and uniformly stirring; and putting the foamed metal subjected to acid treatment into a mixed solution, carrying out ultrasound for 30 seconds during soaking, moving out after 30 seconds, drying, and carrying out high temperature heat treatment. The preparation method has the beneficial effects that the surface of the foamed metal is covered with cobalt-nickel oxide active materials and graphene by removing surface impurities and oxidation layers, carrying out solution dip dyeing and secondary drying in sequence, and the adsorption surface areas of the active materials are enlarged; the preparation process is simple and environmentally-friendly; and the prepared modified foamed metal has the advantages of large surface area, strong adsorption capability and the like.

Description

technical field [0001] The invention relates to a preparation method of a three-dimensional modified graphene filter net. Background technique [0002] Metal foam is a three-dimensional network structure, low density, light weight, high porosity (higher than 95%), large specific surface area, good tensile strength, moderate pore size (200-600μm), easy to load active substances, etc. , using the filter screen made of foam metal, when the air flows through the filter screen, the air will have full contact with the filter screen. However, since metal foam itself has neither the ability to catalyze the decomposition of formaldehyde nor the function of adsorbing formaldehyde, it is possible to modify the surface of metal foam and load a catalyst on its surface to make it have a good ability to remove formaldehyde. [0003] The purification principles of formaldehyde harmful gases are generally divided into two types: 1. Physical adsorption. Physical adsorption technology mainly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D53/86B01D53/72B01D53/02B01J23/755B01J35/10
Inventor 王功名翟腾卢锡洪邓惠贤王成胜
Owner 中山市天美能源科技有限公司
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