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Oxidized graphene-rhamnolipid composite material and preparation method and application thereof

A technology of rhamnolipid and composite materials, applied in chemical instruments and methods, other chemical processes, adsorption water/sewage treatment, etc., can solve the problems of high biological toxicity, poor treatment effect, and low adsorption capacity, and achieve biological Low toxicity, easy solid-liquid separation, large adsorption effect

Active Publication Date: 2013-12-04
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there have been researches on composite materials combining graphene oxide with chitosan, polyethersulfone and calcium alginate at home and abroad, and have been used in the treatment of dye wastewater, but the adsorption capacity is low and the treatment effect is low. Poor, high biological toxicity and other defects

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  • Oxidized graphene-rhamnolipid composite material and preparation method and application thereof
  • Oxidized graphene-rhamnolipid composite material and preparation method and application thereof
  • Oxidized graphene-rhamnolipid composite material and preparation method and application thereof

Examples

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Embodiment 1

[0035] Preparation method of graphene oxide-rhamnolipid composite material and application of methylene blue dye adsorption.

[0036] (1) Preparation of graphene oxide-rhamnolipid composite material: Weigh 100 mg of graphene oxide and add it to 100 ml of dimethylformamide, ultrasonically strip it for 1 hour to form graphene oxide mixture, and then add graphene oxide mixture to Add 400mg rhamnolipid with a mass content of 90%, 400mg EDC and 80mg DMAP and mix evenly. After ultrasonic reaction at 25°C-45°C for 3h, add 50ml of anhydrous methanol and stir for 15min to produce precipitation; After washing with water and ethanol, centrifuge at 10,000 rpm for 15 minutes, wash and filter with deionized water, and finally vacuum freeze-dry at -110°C for 3 days to obtain the graphene oxide-rhamnolipid composite material.

[0037] (2) Application of graphene oxide-rhamnolipid composite material for adsorption of methylene blue dye: Weigh 10 mg of graphene oxide-rhamnolipid composite mater...

Embodiment 2

[0040] Preparation method of graphene oxide-rhamnolipid composite material and application of methylene blue dye adsorption.

[0041](1) Preparation of graphene oxide-rhamnolipid composite material: Weigh 100 mg of graphene oxide and add it to 100 ml of dimethylformamide, ultrasonically strip it for 1 hour to form graphene oxide mixture, and then add graphene oxide mixture to Add 300mg rhamnolipid with a mass content of 90%, 500mg EDC and 100mg DMAP and mix evenly. After ultrasonic reaction at 25°C-45°C for 3h, add 60ml of anhydrous methanol and stir for 15min to produce precipitation; After washing with water and ethanol, centrifuge at 10,000 rpm for 15 minutes, wash and filter with deionized water, and finally vacuum freeze-dry at -110°C for 2 days to obtain graphene oxide-rhamnolipid composite material. The graphene oxide-rhamnolipid composite material that above-mentioned steps makes is carried out scanning electron microscope, transmission electron microscope and Fourier ...

Embodiment 3

[0046] Preparation method of graphene oxide-rhamnolipid composite material and application of adsorbed methyl violet dye.

[0047] (1) Preparation of graphene oxide-rhamnolipid composite material: Weigh 100 mg of graphene oxide and add it to 100 ml of dimethylformamide, ultrasonically strip it for 1 hour to form graphene oxide mixture, and then add graphene oxide mixture to Add 200mg rhamnolipid with a mass content of 90%, 600mg EDC and 100mg DMAP and mix evenly. After ultrasonic reaction at 25℃~45℃ for 3h, add 50ml anhydrous methanol and stir for 15min to produce precipitation; After washing with water and ethanol, centrifuge at 10,000 rpm for 15 minutes, wash and filter with deionized water, and finally vacuum freeze-dry at -110°C for 3 days to obtain the graphene oxide-rhamnolipid composite material.

[0048] (2) Adsorption of methyl violet by graphene oxide-rhamnolipid composite material: Weigh 5mg, 10mg, 15mg, 20mg graphene oxide-rhamnolipid composite material in 25ml, co...

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Abstract

The invention discloses an oxidized graphene-rhamnolipid composite material which is black gray powder and is of a laminar multi-hole nano structure. The invention further discloses a preparation method of the composite material. The preparation method includes the following steps that oxidized graphene is added into a dispersing agent, and oxidized graphene mixed liquor is formed after ultrasonic dispersion; rhamnolipid, 1-ethyl-(3-dimethyl amino propyl) carbodiimide hydrochloride and 4-dimethylamino pyridine are added into the mixed liquor, then the ultrasonic reaction is performed, and a certain amount of absolute methanol is added and mixed for generating sediments; the sediments are washed and centrifuged, and finally the oxidized graphene-rhamnolipid composite material is prepared through vacuum freeze drying. The invention further relates to application, in aspect of cationic dye absorption, of the composite material prepared through the method. The prepared composite material is low in biological toxicity and not prone to agglomeration, the preparation method is simple and easy to carry out, and in the process of the cationic dye absorption, the prepared composite material has the advantages of being free of secondary pollution and enabling solids and liquids to be separated easily.

Description

technical field [0001] The invention belongs to the field of material preparation and environmental protection, and in particular relates to a graphene oxide-rhamnolipid composite material, a preparation method thereof and the application of adsorbing cationic dyes. Background technique [0002] With the development of the economy, dyes are widely used in textiles, leather, food, paint, ink and rubber and other fields. Therefore, the environmental problems caused by dye wastewater in my country are becoming increasingly prominent. Most dyes have strong chemical stability and biodegradability, so they can exist in water for a long time and cause serious environmental pollution. At present, in order to reduce the pollution of dye wastewater to the environment, methods such as photocatalytic degradation, membrane filtration, flocculation and precipitation, electrochemical technology, and adsorption have been applied to the decolorization of dye wastewater. Adsorption treatment...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28
Inventor 袁兴中吴志斌王侯曾光明钟华王乐乐肖智华冷立健黄丹莲梁婕陈耀宁
Owner HUNAN UNIV
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