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Fe3O4@bacterial cellulose/graphene oxide composite aerogel as well as preparation method and application thereof

A composite technology of bacterial cellulose and graphene, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve problems such as high cost, complicated separation process, and unfavorable quantitative production, etc. Achieve the effect of low cost, complex separation process and increased specific surface area

Inactive Publication Date: 2019-03-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The graphene oxide raw material used is a single-layer structure, which is expensive and not conducive to quantitative production
And the separation process of materials from water is complex

Method used

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  • Fe3O4@bacterial cellulose/graphene oxide composite aerogel as well as preparation method and application thereof
  • Fe3O4@bacterial cellulose/graphene oxide composite aerogel as well as preparation method and application thereof
  • Fe3O4@bacterial cellulose/graphene oxide composite aerogel as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Desugaring treatment of bacterial cellulose: take 100g of bacterial cellulose, wash it three times with tap water, wash it once with deionized water, 4mol / L NaOH solution, soak at 75°C for 6h. Wash with tap water after soaking to pH=7.

[0048] Preparation of graphene oxide aqueous solution: Mix 0.1 g of multilayer graphene oxide (available from Suzhou Hengqiu Technology Co., Ltd.) with 100 mL of deionized water, and ultrasonically disperse at 45° C. for 1 h to prepare a graphene oxide solution.

[0049] Preparation of bacterial cellulose / graphene oxide composite hydrogel: Stir the desugared bacterial cellulose into a slurry, add 400mL graphene oxide aqueous solution to the bacterial cellulose slurry, stir evenly for 20min, 30°C, Under 80Hz, ultrasonic vibration for 2h, and after standing for 1d, the bacterial cellulose / graphene oxide composite hydrogel material was obtained.

[0050] In bacterial cellulose / graphene oxide composite hydrogel material, add 5.56g FeSO 4 ...

Embodiment 2

[0060] Desugaring treatment of bacterial cellulose: take 100g of bacterial cellulose and wash it three times with tap water and once with deionized water, 4mol / L NaOH solution, soaking time at 70°C for 2h. Wash with tap water after soaking to pH=9.

[0061] Preparation of graphene oxide aqueous solution: Mix 0.4 g of multilayer graphene oxide with 100 mL of deionized water, and ultrasonically disperse at 60° C. for 2 h to prepare a graphene oxide solution.

[0062] Preparation of bacterial cellulose / graphene oxide composite hydrogel: Stir the desugared bacterial cellulose into a slurry, add 50mL graphene oxide aqueous solution to the bacterial cellulose slurry, stir evenly for 10min, 60°C, Under 60Hz, ultrasonic vibration for 1h, and after standing for 3d, the bacterial cellulose / graphene oxide composite hydrogel material was obtained.

[0063] In bacterial cellulose / graphene oxide composite hydrogel material, add 5.56g FeSO 4 ·7H 2 O and 2.71 g FeCl 3 ·6H 2 O(FeSO 4 ·7H...

Embodiment 3

[0073] Desugaring treatment of bacterial cellulose: take 100g of bacterial cellulose, wash it three times with tap water, wash it once with deionized water, and soak it in 2.5mol / L NaOH solution at 60°C for 1h. Wash with tap water after soaking to pH=10.

[0074] Preparation of graphene oxide aqueous solution: Mix 0.01 g of multilayer graphene oxide with 100 mL of deionized water, and ultrasonically disperse at 30° C. for 3 h to prepare a graphene oxide solution.

[0075] Preparation of bacterial cellulose / graphene oxide composite hydrogel: Stir the desugared bacterial cellulose into a slurry, add 200mL graphene oxide aqueous solution to the bacterial cellulose slurry, stir evenly for 30min, and heat at 45°C After ultrasonic vibration for 3 hours and standing for 2 days, bacterial cellulose / graphene oxide composite hydrogel material was obtained

[0076] In bacterial cellulose / graphene oxide composite hydrogel material, add 0.556g FeSO 4 ·7H 2 O and 21.64 g FeCl 3 ·6H 2 O...

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Abstract

The invention provides Fe3O4@bacterial cellulose / graphene oxide composite aerogel as well as a preparation method and application thereof. The preparation method comprises the following steps: washingbacterial cellulose with water, soaking in a sodium hydroxide alkali solution, and removing saccharides; adding the crushed bacterial cellulose slurry into ultrasonically dispersed graphene oxide mixed liquid, stirring uniformly, then ultrasonically vibrating and mixing, and standing for a period of time; adding an appropriate amount of mixed liquid of FeSO4.7H2O, FeCl3.6H2O, polyethylene glycol4000 and absolute ethanol, adding a suitable amount of ammonia water under the condition of high temperature stirring, carrying out a reaction for a period of time, and freeze-drying to obtain the Fe3O4@bacterial cellulose / graphene oxide composite aerogel material. The material is used for absorbing and removing heavy metals such as Pb, Cd, Cu, Cr and Mn in sewage and polluted soil; the preparation method not only improves the absorption performance of the bacterial cellulose, but also enhances the separation effect of the material, thus avoiding secondary pollution.

Description

technical field [0001] The invention relates to the technical field of preparation of adsorption materials for water treatment and soil treatment, in particular to a Fe 3 o 4 @Preparation method of bacterial cellulose / graphene oxide composite airgel. Background technique [0002] In recent years, with the development of industry, some industrial heavy metal wastes have not been properly disposed of, and are directly or indirectly discharged into the natural environment, causing large-scale heavy metal pollution and affecting the health of animals and humans through the food chain. [0003] In order to reduce the environmental pollution caused by heavy metals, the treatment of heavy metal wastewater has been studied at home and abroad. Due to the advantages of high process efficiency, low cost, and simple method, the heavy metal ion adsorption method is the most common. [0004] Bacterial cellulose has high purity and crystallinity, the surface is arranged in a network of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30B09C1/00C02F1/28C02F101/20
CPCB01J20/06B01J20/20B01J20/24B01J20/28009B01J20/28047B09C1/00C02F1/281C02F1/283C02F1/286C02F1/288C02F2101/20
Inventor 钟明峰许静张志杰何峰张子豪
Owner SOUTH CHINA UNIV OF TECH
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