Hollow ferroferric oxide/reduced graphene oxide nano composite wave-absorbing material and preparation method thereof
A technology of hollow Fe3O4 and Fe3O4, applied in the field of material chemistry, can solve problems such as poor impedance matching mechanism and unfavorable electromagnetic absorption of materials
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Embodiment 1
[0031] A hollow Fe3O4 / reduced graphene oxide nanocomposite absorbing material
[0032] This embodiment provides a hollow iron ferric oxide / reduced graphene oxide nanocomposite absorbing material, and its specific preparation method is as follows:
[0033] 0.125 g of graphene oxide was added to 80 ml of ethylene glycol solution, and the ultrasonic treatment was performed for 30 min with an ultrasonic power of 500 W. Subsequently, under the condition of 500r / min, 5.4g of ferric chloride hexahydrate and 0.4g of polyvinylpyrrolidone were sequentially added to the graphene oxide ethylene glycol dispersion, and ultrasonic stirring was continued for 1.5h to obtain a mixed solution. Add 2.5g of urea into the mixed solution under ultrasonic stirring, transfer the obtained solution to a 100ml reactor, and react at 200°C for 20h. After the reaction was completed and cooled naturally, the precipitate was washed three times with deionized water, and dried in a vacuum oven at 60 °C for 12 ...
Embodiment 2
[0035] A hollow Fe3O4 / reduced graphene oxide nanocomposite absorbing material
[0036] This embodiment provides a hollow iron ferric oxide / reduced graphene oxide nanocomposite absorbing material, and its specific preparation method is as follows:
[0037] 0.25 g of graphene oxide was added to 80 mL of ethylene glycol solution, and ultrasonically treated for 30 min with an ultrasonic power of 500 W. Subsequently, under the condition of 500r / min, 5.4g of ferric chloride hexahydrate and 0.4g of polyvinylpyrrolidone were sequentially added to the graphene oxide ethylene glycol dispersion, and ultrasonic stirring was continued for 1.5h to obtain a mixed solution. Add 2.5g of urea into the mixed solution under ultrasonic stirring, transfer the obtained solution to a 100ml reactor, and react at 200°C for 20h. After the reaction was completed and cooled naturally, the precipitate was washed three times with deionized water, and dried in a vacuum oven at 60 °C for 12 h to obtain the h...
Embodiment 3
[0039] A hollow Fe3O4 / reduced graphene oxide nanocomposite absorbing material
[0040] This embodiment provides a hollow iron ferric oxide / reduced graphene oxide nanocomposite absorbing material, and its specific preparation method is as follows:
[0041] 0.5 g of graphene oxide was added to 80 ml of ethylene glycol solution, and the ultrasonic treatment was performed for 30 min with an ultrasonic power of 500 W. Subsequently, under the condition of 500r / min, 5.4g of ferric chloride hexahydrate and 0.4g of polyvinylpyrrolidone were sequentially added to the graphene oxide ethylene glycol dispersion, and ultrasonic stirring was continued for 1.5h to obtain a mixed solution. Add 2.5g of urea into the mixed solution under ultrasonic stirring, transfer the obtained solution to a 100ml reactor, and react at 200°C for 20h. After the reaction was completed and cooled naturally, the precipitate was washed three times with deionized water, and dried in a vacuum oven at 60 °C for 12 h ...
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