Preparation method of magnetic graphene ternary composite material based on click chemistry
A technology of magnetic graphene and composite materials, applied in the field of graphene, can solve problems such as difficult solid-liquid phase separation, uneven particle size, and irregular shape, and achieve regular shape, uniform particle size, and good dispersion Effect
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Embodiment 1
[0022] Example 1: Magnetic Fe 3 o 4 preparation of
[0023] 1.0g FeCl 3 ·6H 2 O was added to 20mL of ethylene glycol, ultrasonically dispersed at 50°C for 0.5h until the solution was clear; then 3.0g of anhydrous sodium acetate was added, ultrasonically dispersed at 50°C for 0.5h, and then the mixed solution was added to a polytetrafluoroethylene autoclave Reaction at 200°C for 6h. Cool to room temperature, magnetically separate, wash several times with ultrapure water to pH 7.0, then wash several times with ethanol, and vacuum dry at 60°C for 6 hours to obtain magnetic Fe 3 o 4 . Produced Fe 3 o 4 The TEM image of figure 1 As shown, Fe prepared by traditional solvothermal method 3 o 4 The particle size is 300-500nm.
Embodiment 2
[0024] Embodiment 2: magnetic nanometer Fe 3 o 4
[0025] 1.0g FeCl 3 ·6H 2 Add O to 20mL of ethylene glycol, ultrasonically disperse at 50°C for 0.5h until the solution is clear; then add 3.0g of anhydrous sodium acetate, ultrasonically disperse at 50°C for 0.5h, then add 0.4g of sodium hydroxide and 10.0mL of ethylenediamine , ultrasonically disperse at 50°C for 0.5h until the solution is clear; then add the mixed solution into a polytetrafluoroethylene autoclave and react at 200°C for 6h. Cool to room temperature, magnetically separate, wash several times with ultrapure water until the pH is 7.0, then wash several times with ethanol, and vacuum dry at 60°C for 6 hours to obtain magnetic nano-Fe 3 o 4 . The prepared magnetic nano-Fe 3 o 4 The scanning electron microscope image of figure 2 As shown, the Fe prepared by the modified solvothermal method 3 o 4 The particle size is 50-60nm, with regular shape, uniform particle size and good dispersion.
Embodiment 3
[0026] Example 3: Preparation of Amino-modified Magnetic Graphene Ternary Composite Material
[0027] 1.0g FeCl 3 ·6H 2Add O to 20mL of ethylene glycol, ultrasonically disperse at 50°C for 0.5h until the solution is clear; then add 3.0g of anhydrous sodium acetate, ultrasonically disperse at 50°C for 0.5h, then add 0.4g of sodium hydroxide and 10.0mL of ethylenediamine , ultrasonically disperse at 50°C for 0.5h until the solution is clear; add 50mg of carboxylated graphene, ultrasonically disperse at 50°C for 1h, then add the mixed solution into a polytetrafluoroethylene autoclave at 200°C for 6h. Cool to room temperature, magnetically separate, wash several times with ultrapure water until the pH is 7.0, then wash several times with ethanol, and vacuum-dry at 60°C for 6 hours to obtain an amino-modified magnetic graphene ternary composite. The scanning electron microscope picture of the above-mentioned amino modified magnetic graphene ternary composite material is as follow...
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