Composite cross-linked graphene oxide film as well as preparation method and application thereof
A graphene membrane and composite technology, applied in chemical instruments and methods, separation methods, membrane technology, etc., can solve the problems of difficult to achieve lamella connection, pillar support, difficult to prepare high-throughput and high-separation performance GO membranes, etc. , to achieve the effect of excellent separation performance, easy large-scale production and high separation performance
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Embodiment 1
[0039] (1) Preparation of graphene oxide (GO)
[0040] 1g NaNO 3 , 46mL concentrated H 2 SO 4 Mixed into the beaker, cooled to 5 ℃, then added 2g flake graphite (325 mesh), stirred for 1h, then 6g KMnO 4 Add in batches within 1 hour, stir while adding, continue stirring for 10 minutes in an ice bath (temperature less than 20°C) after the addition, then raise the temperature to 35°C for 2 hours, then slowly add 92mL of deionized water, using the heat released by itself Carry out the reaction until the temperature no longer rises and begins to drop. After stirring for 15 min, add 280 mL of deionized water to terminate the reaction, and finally add 30% H 2 o 2 , until the solution turns yellow and produces golden yellow particles. The resulting product was washed 4-5 times with 5% HCl (rotating speed 4000r / min), then washed to neutrality with deionized water (rotating speed was initially 4000r / min, then rose to 8000r / min, and finally 11000r / min min), the washed product was ...
Embodiment 2
[0051] (1) Preparation of graphene oxide (GO)
[0052] 2.5g NaNO 3 , 115mL concentrated H 2 SO 4 Mix and add to the beaker, cool to 5°C, then add 5g flake graphite (325 mesh), stir for 1h, then add 15g KMnO 4 Add in batches within 1 hour, stir while adding, continue stirring for 10 minutes in an ice bath (temperature less than 20°C) after the addition, then raise the temperature to 35°C for 2 hours, then slowly add 230mL deionized water, use the heat released by itself Carry out the reaction until the temperature no longer rises and begins to drop. After stirring for 15 min, add 700 mL of deionized water to terminate the reaction, and finally add 30% H 2 o 2 , until the solution turns yellow and produces golden yellow particles. The resulting product was washed 4-5 times with 5% HCl (rotating speed 4000r / min), then washed to neutrality with deionized water (rotating speed was initially 4000r / min, then rose to 8000r / min, and finally 11000r / min min), the washed product was...
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