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Biosynthesis method of magnetic graphene composite material

A magnetic graphene and composite material technology, applied in the direction of microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of harsh reaction conditions, chemical reagent pollution, etc., and achieve mild reaction conditions, simple operation, and low energy consumption. low effect

Inactive Publication Date: 2014-09-17
DALIAN UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problems of harsh reaction conditions and easy pollution caused by chemical reagents in the preparation method of magnetic graphene composite materials in the prior art, and provide a biological preparation method of magnetic graphene composite materials

Method used

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  • Biosynthesis method of magnetic graphene composite material
  • Biosynthesis method of magnetic graphene composite material
  • Biosynthesis method of magnetic graphene composite material

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Embodiment 1

[0026] Preparation of magnetic graphene composites:

[0027] (1) Preparation of graphene oxide: graphene oxide is the precursor material of Shewanellaoneidensis MR-1 synthetic graphene; Weigh 1g flake graphite powder and add in 46mL concentrated sulfuric acid and 10mL concentrated nitric acid, stir in ice bath for 30min; Slowly add 6g of potassium permanganate to the powder mixture, and stir in an ice bath for 120min; then place the mixture in a 35°C water bath and stir overnight; add 46mL of ultrapure water to the mixture, place it in an oil bath at 98°C for 30min, cool to room temperature, and then Add 200mL of ultrapure water; add 20mL of 30% hydrogen peroxide dropwise to remove excess potassium permanganate; wash the resulting product with 10% dilute hydrochloric acid for 3 times, and wash with ultrapure water several times until the supernatant The liquid becomes neutral; after ultrasonication for 3 hours, the obtained precipitate is dried in a vacuum oven at 60°C after c...

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Abstract

The invention belongs to the field of biosynthesized nano materials, and relates to a biosynthesis method of a magnetic graphene composite material. The method comprises the following steps: regulating the pH value of 10-30 mmol / L piperazinyl-1,4-diethylsulfonic acid and 10-30 mmol / L sodium lactate to 7.0, deoxidizing and sterilizing; adding graphene oxide into a culture solution, wherein the concentration of the graphene oxide is 0.4-0.6 g / L; carrying out ultrasonic treatment for 30-80 minutes, and adding beta-FeOOH until the concentration of the beta-FeOOH is 30-80 mmol / L; carrying out anaerobic magnetic stirring for 12-36 hours; collecting the dissimilatory metal reducing bacteria in the later logarithmic growth phase; and adding the dissimilatory metal reducing bacteria into the mixed solution, and culturing at 30 DEG C under anaerobic conditions for 132-156 hours to obtain the magnetic graphene composite material. The method has the advantages of mild technical reaction conditions and low energy consumption, and is simple to operate; and the prepared magnetic graphene composite material can be used for adsorption, magnetic catalysis and the like.

Description

technical field [0001] The invention belongs to the field of biosynthetic nanometer materials, and relates to a biosynthesis method of a magnetic graphene composite material. Background technique [0002] Graphene is a two-dimensional carbon material with a thickness of only one atom. Due to its high mechanical strength, large specific surface area and good electrical conductivity, it has broad application prospects in the fields of electronics, sensors, catalysis and energy. Compared with carbon materials of other dimensions, graphene not only has the above advantages, but also has the advantages of low preparation cost and easy functionalization. Therefore, graphene becomes an ideal choice for loading inorganic nanoparticles. Magnetic Fe 3 o 4 Nanoparticles have the characteristics of good biocompatibility, strong superparamagnetism, low toxicity, easy preparation and easy separation during the process, and their application in the fields of catalysis, sensors, drug rel...

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Application Information

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IPC IPC(8): C12P3/00C12R1/01
Inventor 柳广飞张欣王宁周集体金若菲
Owner DALIAN UNIV OF TECH
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