Preparation method of functionalized graphene and application of functionalized graphene in formaldehyde adsorption

A technology of graphene and graphene, which is applied in the field of preparation of functionalized graphene, can solve the problems of free pollutants, incomplete adsorption and purification of formaldehyde, etc., and achieve the effect of inhibiting free, high specific surface area and promoting decomposition

Inactive Publication Date: 2017-09-08
常州城工新材料科技有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the present invention: In order to solve the problem that the adsorption and purification of formaldehyde in the prior art is not complete, and the adsorbed pollutants may be freed under certain conditions, the present invention provides a preparation method of functionalized graphene and its ability to react with formaldehyde. Applications in Adsorption

Method used

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  • Preparation method of functionalized graphene and application of functionalized graphene in formaldehyde adsorption
  • Preparation method of functionalized graphene and application of functionalized graphene in formaldehyde adsorption
  • Preparation method of functionalized graphene and application of functionalized graphene in formaldehyde adsorption

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Experimental program
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Effect test

Embodiment 1

[0020] (1) Titanium dioxide: graphene oxide is added to deionized water according to a mass ratio of 20:1, so that the mass concentration of graphene oxide is 0.03%, and the stirring speed is 200 rpm for ultrasonic dispersion for 25 minutes to obtain graphene oxide 1. Titanium dioxide dispersion, placed in a round bottom flask;

[0021] (2) add ammoniacal liquor and hydrazine hydrate in the flask of step (1) according to the mass ratio of 10:1, fully mix, obtain mixed liquor;

[0022] (3) Place the mixed solution obtained in step (2) in an oil bath at 85°C for 2 hours to react to obtain a reaction solution;

[0023] (4) Centrifuge the reaction liquid obtained in step (3) after cooling, wash to near neutrality, and obtain functionalized graphene powder through vacuum freeze-drying.

[0024] A fixed formaldehyde detector is used to detect the concentration of formaldehyde gas absorbed by the functionalized graphene prepared by the method. After the baseline of the instrument is...

Embodiment 2

[0026] (1) Titanium dioxide: graphene oxide is added to deionized water according to the mass ratio of 20:1, so that the mass concentration of graphene oxide is 0.05%, and it is ultrasonically dispersed for 25 minutes at a stirring speed of 250 rpm to obtain graphene oxide 1. Titanium dioxide dispersion, placed in a round bottom flask;

[0027] (2) add ammoniacal liquor and hydrazine hydrate in the flask of step (1) according to the mass ratio of 15:1, fully mix, obtain mixed liquor;

[0028] (3) Place the mixed solution obtained in step (2) in an oil bath at 95°C for 1 hour to react to obtain a reaction solution;

[0029] (4) Centrifuge the reaction liquid obtained in step (3) after cooling, wash to near neutrality, and obtain functionalized graphene powder through vacuum freeze-drying.

[0030] The test method is the same as in Example 1. The functionalized graphene prepared by this method absorbs formaldehyde, and after 6 hours of adsorption, the formaldehyde removal rate ...

Embodiment 3

[0032] (1) Titanium dioxide: graphene oxide is added to deionized water according to a mass ratio of 30:1, so that the mass concentration of graphene oxide is 0.05%, and the stirring speed is 250 rpm for ultrasonic dispersion for 25 minutes to obtain graphene oxide 1. Titanium dioxide dispersion, placed in a round bottom flask;

[0033] (2) add ammoniacal liquor and hydrazine hydrate in the flask of step (1) according to the mass ratio of 15:1, fully mix, obtain mixed solution;

[0034] (3) Place the mixed solution obtained in step (2) in an oil bath at 100°C for 0.5 hours to react to obtain a reaction solution;

[0035] (4) Centrifuge the reaction liquid obtained in step (3) after cooling, wash to near neutrality, and obtain functionalized graphene powder through vacuum freeze-drying.

[0036] The test method is the same as in Example 1. The functionalized graphene prepared by this method is used to adsorb formaldehyde. After 6 hours of adsorption, the formaldehyde removal r...

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Abstract

The invention belongs to the technical field of adsorption. Graphene is subjected to functional modification by virtue of ammonia water and hydrazine hydrate, and meanwhile, the surface of graphene is uniformly adhered with titanium dioxide when graphene is subjected to ultrasonic dispersion. In a formaldehyde adsorption process, on one hand, amino groups on the surface of graphene react with formaldehyde, and on the other hand, the decomposition of formaldehyde can be promoted by titanium dioxide, so that the phenomenon that formaldehyde dissociates after being adsorbed is remarkably reduced by virtue of a synergistic effect of the amino groups and formaldehyde.

Description

technical field [0001] The invention belongs to the technical field of adsorption, in particular to a preparation method of functionalized graphene and its application in formaldehyde adsorption. Background technique [0002] my country is one of the countries that use and produce the most formaldehyde. Formaldehyde is mainly used in chemical production, real estate construction industry, interior decoration industry, medical industry and wood products industry. In chemical production, formaldehyde is mostly used as an important organic chemical raw material and solvent. It is not only an important chemical raw material for synthetic resins, rubber, and plastics, but also an intermediate substance for many chemical products. Because of this, our surroundings are full of Formaldehyde is a serious threat to people's daily life and health. Formaldehyde can cause various health effects, such as poisoning, allergies, asthma, lung function damage, cancer and even death. Formald...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02B01D53/86B01D53/72
CPCB01D53/02B01D53/8668B01D2258/06B01J20/20
Inventor 操林海王建新谢逸栋蒋晓曙
Owner 常州城工新材料科技有限公司
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