Graphene/ferroferric oxide composite wave-absorbing material and preparation method thereof
A composite wave-absorbing material, the technology of ferroferric oxide, which is applied in the field of wave-absorbing materials, can solve the problems of polluted environment, low electrical conductivity, and difficulty in film formation
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[0028] The embodiment of the present invention provides a preparation method of a graphene / ferric oxide composite wave absorbing material, which includes the following steps:
[0029] Preparation of graphene oxide dispersion, FeCl 2 Solution and FeCl 3 Solution
[0030] Mix the above three liquids, stir and mix for 2-3 hours at 80-120 degrees (preferably 100 degrees) to obtain graphene oxide / Fe 3 O 4 Dispersions;
[0031] The graphene oxide / Fe 3 O 4 The dispersion is dried in vacuum to obtain graphene oxide / Fe 3 O 4 Aerogel
[0032] The graphene oxide / Fe 3 O 4 Aerogel is heated to obtain graphene / Fe 3 O 4 Aerogel, the graphene / Fe 3 O 4 Aerogel is mechanically pressed to obtain graphene / Fe 3 O 4 Composite material; the graphene / Fe 3 O 4 The composite material is a layered structure stacked in layers.
[0033] The preparation method of the graphene / ferric oxide composite absorbing material provided by the embodiment of the present invention makes full use of the graphene oxide rich in -OH...
Example Embodiment
[0048] Example 1
[0049] The preparation of graphene oxide: the Hummer method is used to prepare graphene oxide, and the graphene oxide dispersion is prepared after ultrasonic peeling, with a concentration of 0.8 mg / ml;
[0050] Graphene paper / Fe 3 O 4 Preparation of composite absorbing materials:
[0051] Dissolve 0.4g of graphene oxide powder in 100ml of water, sonicate it for 35 minutes at a frequency of 200-300Hz to form a graphene oxide dispersion with a concentration of 4mg / ml;
[0052] Weigh 0.4g FeCl 2 ·4H 2 O and dissolve in 20ml water, weigh 1g FeCl 3 ·6H 2 O and dissolve in 40ml water;
[0053] Add the above prepared solution to the graphene oxide solution and stir for 2.5 hours at 100 degrees to form graphene oxide / Fe 3 O 4 Uniform dispersion (of which Fe 3 O 4 The content is 25%, Fe 3 O 4 The particle size is 30nm);
[0054] Graphene oxide / Fe 3 O 4 The dispersion is freeze-dried under vacuum for 24h to form graphene oxide / Fe 3 O 4 Aerogel
[0055] Graphene oxide / Fe 3 O 4 The...
Example Embodiment
[0057] Example 2
[0058] The preparation of graphene oxide: the Hummer method is used to prepare graphene oxide, and the graphene oxide dispersion is prepared after ultrasonic peeling, with a concentration of 7.5 mg / ml;
[0059] Graphene paper / Fe 3 O 4 Preparation of composite absorbing materials:
[0060] Dissolve 0.4g of graphene oxide powder in 100ml of water, sonicate it for 40 minutes at a frequency of 200-300Hz to form a graphene oxide dispersion with a concentration of 4mg / ml;
[0061] Weigh 0.4g FeCl 2 ·4H 2 O and dissolve in 20ml water, weigh 1g FeCl 3 ·6H 2 O and dissolve in 40ml water;
[0062] Add the above prepared solution to the graphene oxide solution and stir for 3 hours at 100 degrees to form graphene oxide / Fe 3 O 4 Uniform dispersion (of which Fe 3 O 4 The content is 45%, Fe 3 O 4 The particle size is 45nm);
[0063] Graphene oxide / Fe 3 O 4 The dispersion is freeze-dried under vacuum for 24h to form graphene oxide / Fe 3 O 4 Aerogel
[0064] Graphene oxide / Fe 3 O 4 The a...
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