Polymer brush type magnetic graphene oxide adsorbing material and preparation method thereof

A polymer brush and adsorption material technology, applied in chemical instruments and methods, alkali metal compounds, adsorption water/sewage treatment, etc., to achieve high adsorption selectivity, increase adsorption capacity, and increase density

Active Publication Date: 2020-09-08
NINGXIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the raw materials for synthesizing graphene are abundant in nature, it is still a challenge to develop some graphene-based adsorbents with high selectivity and high adsorption capacity through modification of graphene.

Method used

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  • Polymer brush type magnetic graphene oxide adsorbing material and preparation method thereof
  • Polymer brush type magnetic graphene oxide adsorbing material and preparation method thereof
  • Polymer brush type magnetic graphene oxide adsorbing material and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0040] The preparation method of above-mentioned polymer brush type magnetic graphene oxide adsorption material comprises the following steps:

[0041] S1, graphite oxidation, including: pre-oxidation first, and then positive oxidation;

[0042] The pre-oxidation process includes: adding graphite powder into concentrated sulfuric acid containing potassium persulfate and phosphorus pentoxide, reacting at 60-100°C for 4-8 hours under magnetic stirring, cooling to room temperature, filtering the solid and washing it with distilled water to the washing liquid It is neutral, and the solid is filtered to obtain pre-oxidized graphite after drying;

[0043] The positive oxidation process includes: adding the pre-oxidized graphite into concentrated sulfuric acid under ice bath conditions, adding potassium permanganate under stirring, stirring and reacting at 20-50°C for 1-3 hours, adding water and hydrogen peroxide, The reaction was terminated when the solution turned bright yellow; t...

Embodiment 1

[0051] This embodiment prepares a polymer brush type magnetic graphene oxide adsorption material, namely the magnetic oxidation of grafted poly(4-sodium vinylbenzene sulfonate-co-methacryloyloxyethyltrimethylammonium chloride) Graphene adsorption material Fe 3 o 4 @GO@PDA@poly(NASS-co-DMC), its preparation flow chart is as follows figure 1 shown.

[0052] 1. Graphite pre-oxidation

[0053] Add 2g of graphite powder (G) to 3mL of 18mol.L containing potassium persulfate and 1g of phosphorus pentoxide -1 In concentrated sulfuric acid, react under magnetic stirring at 80°C for 6h, cool to room temperature, filter the solid to dilute with distilled water, filter with suction, wash the solution until the pH is neutral, wash with ethanol and dry in vacuum at 50°C to obtain pre-oxidized graphite.

[0054] 2. Preparation of graphene oxide by improved Hummers method

[0055] Add 2g of pre-oxidized graphite to 46mL of concentrated sulfuric acid under ice bath conditions, slowly add ...

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Abstract

The invention discloses a polymer brush type magnetic graphene oxide adsorbing material and a preparation method thereof, and relates to the field of adsorbing materials. The adsorbing material provided by the invention comprises graphene oxide, magnetic Fe3O4, polydopamine and a polymer brush. The magnetic Fe3O4 is dispersed on the surface of the graphene oxide in a nano-particle shape to form magnetic graphene oxide; the surface of the magnetic graphene oxide is coated with the polydopamine; the polymer brush is grafted on the polydopamine; the polymer brush includes poly(4-sodium vinylbenzene sulfonate-co-methacryloyloxyethyl trimethyl ammonium chloride). The polymer brush grafted on the surface of the adsorbing material has characteristic functional groups, so that the adsorption selectivity is improved. According to the preparation method of the adsorbing material, graphene with a large specific surface area is used as a matrix, the polymer brush is grafted by combining an SI-ATRPtechnology with a high grafting characteristic, a grafting layer is uniform, the grafting density is high, and the density of functional groups is effectively improved, so that the adsorption capacity of the adsorbing material is improved.

Description

technical field [0001] The invention relates to the field of adsorption materials, in particular to a polymer brush type magnetic graphene oxide adsorption material and a preparation method thereof. Background technique [0002] The dye waste produced by modern industry has become an important part of water pollution, posing a fatal threat to the ecosystem. A large number of toxic, pathogenic and teratogenic organic dyes, especially azo dyes, tend to accumulate in organisms through the food chain. In response to this situation, it is imminent to solve the pollution of water dyes! Among the many technologies used to treat water pollution, the adsorption method has the advantages of safety, economy, and easy operation, and is the most widely used technical means. However, the disadvantages of adsorbents such as low adsorption capacity, low adsorption rate, weak adsorption selectivity, and high difficulty in material recovery limit the practical application of adsorption meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/06B01J20/20B01J20/265B01J20/28009B01J20/28011C02F1/288C02F2101/308
Inventor 卜春苗贾转红
Owner NINGXIA UNIVERSITY
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