A kind of graphene compressible airgel based on chemical reduction method and its preparation method and application
An aerogel and reduction technology, applied in chemical instruments and methods, graphene, inorganic chemistry, etc., can solve problems such as structural brittleness and reduced mechanical properties, and achieve high adsorption capacity, stable structure, and strong practicability. Effect
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Embodiment 1
[0045] 1. Preparation of GO
[0046] Graphite oxide was prepared by Hummers method using natural flake graphite as raw material. In the state of ice bath, take 24mL of concentrated sulfuric acid and place it in a 200mL flask, and add 1.0g of graphite and 0.8g of NaNO 3 , after stirring well, slowly add 5g KMnO 4 Powder (adding in three times), stirred for 10 minutes, then raised the temperature of the solution to 40°C for 2 hours. Raise the temperature to 70°C for 30 minutes, slowly add 50mL of deionized water when the temperature of the solution drops to room temperature, and add 3mL of 30% H to the solution when the temperature drops to 0°C 2 o 2 To terminate the reaction, the reactant turns from brown-black to golden yellow, and there are no bubbles. The reaction solution was centrifugally washed, and the washed solution containing graphite oxide was subjected to ultrasonic peeling for 30 minutes, then centrifuged at 1000 rpm to remove unstripped graphite oxide, and the...
Embodiment 2
[0059] 1. Preparation of GO
[0060] Graphite oxide was prepared by Hummers method using natural flake graphite as raw material. In the state of ice bath, take 24mL of concentrated sulfuric acid and place it in a 200mL flask, and add 1.0g of graphite and 0.8g of NaNO 3 , after stirring evenly, slowly add 5gKMnO 4 Powder (adding in three times), stirred for 10 minutes, then raised the temperature of the solution to 40°C for 2 hours. Raise the temperature to 70°C for 30 minutes, slowly add 50mL of deionized water when the temperature of the solution drops to room temperature, and add 3mL of 30% H to the solution when the temperature drops to 0°C 2 o 2 To terminate the reaction, the reactant turns from brown-black to golden yellow, and there are no bubbles. The reaction solution was centrifugally washed, and the washed solution containing graphite oxide was subjected to ultrasonic peeling for 30 minutes, then centrifuged at 1000 rpm to remove unstripped graphite oxide, and th...
Embodiment 3
[0066] 1. Preparation of GO
[0067] Graphite oxide was prepared by Hummers method using natural flake graphite as raw material. In the state of ice bath, take 24mL of concentrated sulfuric acid and place it in a 200mL flask, and add 1.0g of graphite and 0.8g of NaNO 3 , after stirring evenly, slowly add 5gKMnO 4 Powder (adding in three times), stirred for 10 minutes, then raised the temperature of the solution to 40°C for 2 hours. Raise the temperature to 70°C for 30 minutes, slowly add 50mL of deionized water when the temperature of the solution drops to room temperature, and add 3mL of 30% H to the solution when the temperature drops to 0°C 2 o 2 To terminate the reaction, the reactant turns from brown-black to golden yellow, and there are no bubbles. The reaction solution was centrifugally washed, and the washed solution containing graphite oxide was subjected to ultrasonic peeling for 30 minutes, then centrifuged at 1000 rpm to remove unstripped graphite oxide, and th...
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