A kind of preparation method of magnetic graphene composite material
A technology of magnetic graphene and composite materials, applied in the field of nanotechnology and biosorption, which can solve the problems of difficult filtration and precipitation, small particle size of graphene, etc., and achieve the effect of low cost, mild preparation conditions, and expanded application fields
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Embodiment 1
[0023] Dissolve 0.1g of ferric chloride hexahydrate, 0.3g of hexamethylenetetramine and 0.5g of graphene oxide in 50mL of ethylene glycol solution, ultrasonically disperse for 30min, then transfer to a hydrothermal autoclave, and react at 150°C After 8 hours, cool to room temperature after the reaction is complete, use a magnet to separate the magnetic substance from the solution, wash it repeatedly with water and absolute ethanol and then separate it with a magnet, then dry the separated magnetic graphene at 50°C for 10 hours, and finally A magnetic graphene composite material is obtained. figure 1 It is the Raman spectrum of the magnetic graphene composite.
[0024] The magnetic graphene composite material is added in the organic dye rhodamine 6G solution and stirred for 120min. After the reaction is complete, the magnetic graphene composite nanoparticle is separated from the solution with a magnet, and the content of the remaining organic dye in the solution is detected by ...
Embodiment 2
[0026] Dissolve 0.8g of ferric sulfate, 1.1g of hexamethylenetetramine and 1g of graphene oxide in 70 mL of ethylene glycol solution, ultrasonically disperse for 60 minutes, then transfer to a hydrothermal autoclave, and react at 180°C for 6 hours. After the reaction is complete, cool to room temperature, use a magnet to separate the magnetic substance from the solution, wash it repeatedly with water and acetone, and then separate it with a magnet, then dry the separated magnetic graphene at 80 °C for 6 h, and finally obtain the magnetic graphene composite material. image 3 It is the XRD spectrum of the magnetic graphene composite material.
[0027] The magnetic graphene composite material was added into the organic dye rhodamine B solution and stirred for 90 min. After the reaction was complete, the magnetic graphene composite nanoparticles were separated from the solution with a magnet, and the content of the remaining organic dye in the solution was detected by ultraviolet...
Embodiment 3
[0029] Dissolve 1.2 g of ferric nitrate, 1.8 g of hexamethylenetetramine and 1.5 g of graphene oxide in 100 mL of ethylene glycol solution, ultrasonically disperse for 90 min, then transfer to a hydrothermal autoclave, and react at 200 °C for 6 hours , after the reaction is complete, cool to room temperature, use a magnet to separate the magnetic substance from the solution, wash it repeatedly with water and absolute ethanol and then separate it with a magnet, then dry the separated magnetic graphene at 100 °C for 4 h, and finally get Magnetic graphene composites. Figure 5 TEM image of the magnetic graphene composite.
[0030] The magnetic graphene composite material was added into the organic dye rhodamine B solution and stirred for 90 min. After the reaction was complete, the magnetic graphene composite nanoparticles were separated from the solution with a magnet, and the content of the remaining organic dye in the solution was detected by ultraviolet absorption spectroscop...
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