Graphene adsorption sponge and device
A graphene sponge and gas technology, applied in gas treatment, membrane technology, dispersed particle separation, etc., can solve the problems of difficult recycling, low adsorption efficiency, etc.
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Embodiment 1
[0024] The graphene sponge with superior performance was prepared by alcohol replacement method. 1000-mesh flake graphite is preferred, graphite oxide is prepared by the improved Hummers method, and graphite oxide is ultrasonically stripped to obtain a graphene oxide solution. Afterwards, the water in the graphene solution is replaced with ethylene glycol to prepare an ethylene glycol dispersion with a concentration of 1.5 mg / ml graphene oxide. This step ensures that there is no water in the ethylene glycol dispersion. Then put the solution in a reaction kettle lined with polytetrafluoroethylene and react with 180°C for 24 hours, then replace the reacted ethanol with water, freeze-dry and calcinate the graphene sponge at 350°C.
Embodiment 2
[0026] The reaction process is as image 3 shown. The main filter device of the reactor is mainly composed of graphene sponge, and graphene sponge or graphene sponge composite is used as the adsorbent. The pore size of the graphene sponge can reach 10-600 μm. The pore size of the inner hole is determined by the preparation raw materials and reaction conditions of the graphene foam. Generally, it can be controlled at 5-300 μm, and the specific surface area can reach 1200 m 2 / g _1 Conductivity can reach 0.87 S cm _1 . The volume of the whole reaction device is 1000ml. The air pollutant is cooking oil in the kitchen, the concentration is about 280㎎ / m 3 . The air influx power device passes the gas into the reactor at a rate of 3 L / min. After 0.5 hours of reaction, the air concentration passing through the graphene foam wall is less than 0.5 mg / m 3 . Connect the end of the reactor to a high-temperature incinerator or connect it to the outside to achieve the purpose of a...
Embodiment 3
[0028] The reaction process is as image 3 shown. The main filter device of the reactor is mainly composed of graphene sponge loaded with zinc oxide, and the graphene sponge loaded with zinc oxide composite catalyst as an adsorbent. The pore size of the graphene sponge can reach 300-400 μm. The pore size of the inner hole is determined by the preparation raw materials and reaction conditions of the graphene sponge. Generally, it can be controlled at 50-100 μm, and the specific surface area can reach 1080 m 2 / g _1 Conductivity can reach 0.67 S cm _1 . The volume of the whole reaction device is 1000ml. The air pollutant is formaldehyde gas in the decoration, the concentration is about 130㎎ / m 3 . The air influx power device passes the gas into the reactor at a rate of 3 L / min. After 0.5 hours of reaction, the air concentration passing through the graphene foam wall is less than 0.2mg / m 3 . Connect the end of the reactor to the outside and recover the material in the c...
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