Three-dimensional porous graphene and its preparation method
A three-dimensional porous, graphene technology, applied in graphene, nano-carbon and other directions, can solve the problem of high cost, and achieve the effects of reduced production cost, simple production equipment, and simple and easy operation.
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[0030] see figure 1 , the preparation method of the three-dimensional porous graphene of one embodiment, comprises the following steps:
[0031] Step S10 , ion-exchanging the ion-exchange resin with a solution containing transition metal ions to obtain an ion-exchange resin containing transition metal ions.
[0032] In one of the embodiments, the ion-exchange resin is specifically a cation-exchange resin, which mainly includes two series of styrene-based and acrylic-based. In addition, the ion-exchange resin can also be made by polymerization of other organic monomers, such as phenolic series, epoxy series, vinylpyridine series and urea-formaldehyde series, etc. In one embodiment, the particle size of the ion exchange resin is 1-5 cm, and the cross-linking degree of the ion exchange resin is 80-90%.
[0033] The transition metal ions in the transition metal ion-containing solution are selected from at least one of iron ions, nickel ions and cobalt ions with catalytic propert...
Embodiment 1
[0054] Take 100g of cation-exchange resin I and 10L of 0.1mol / L nickel chloride solution to fully exchange to obtain an exchange resin containing nickel ions. The mass total exchange capacity of cation-exchange resin I and nickel chloride solution is 100g. Put the fully exchanged exchange resin containing nickel ions into a vacuum oven for 12 hours to vacuum dry. The temperature of the vacuum oven is 60 degrees. Mix well with mechanical stirring, the time of mechanical stirring is 1h, and the speed is 1000rpm. Put the above mixture into a crucible with a capacity of 300mL, cover it with a protective cover, put this crucible into another crucible with a capacity of 1000mL, and fill the inside of the 1000mL crucible with activated carbon. Put the large crucible into a domestic 1500W power microwave oven and heat it by alternating microwave heating. The heating program is 2 minutes each time, the heating time interval is 30 seconds, and the heating times are 30 times to obtain a ...
Embodiment 2
[0056] Take 10g of cation-exchange resin II and 10L of 1mol / L ferrous sulfate solution to fully exchange to obtain an exchange resin containing ferrous ions. The mass total exchange capacity of cation-exchange resin II and ferrous sulfate solution is 10g. Put the fully exchanged resin containing ferrous ions into a vacuum oven for vacuum drying for 24 hours. The temperature of the vacuum oven is 80 degrees. Pass the dried resin containing ferrous ions and KOH at a ratio of 1:10 by volume. Mix well with mechanical stirring, the time of mechanical stirring is 2h, and the speed is 800rpm. Put the above mixture into a crucible with a capacity of 30mL, cover it with a protective cover, put this crucible into another crucible with a capacity of 100mL, and fill the inside of the 100mL crucible with activated carbon. Put the large crucible into a domestic 800W power microwave oven and heat it by alternating microwave method. The heating program is 5 minutes each time, the heating time...
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