Preparation method of graphene/porous zinc oxide composite film
A technology of porous zinc oxide and graphene film, applied in the direction of graphene, chemical instruments and methods, zinc oxide/zinc hydroxide, etc., can solve the problems of limited application range, inability to remove, damage to composite film, etc., to achieve simple technology, Tight integration and clear interface effect
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Embodiment 1
[0027] A preparation method of graphene / porous zinc oxide composite film, comprising the following steps:
[0028] Prepare 25mL of 1mg / mL graphene oxide aqueous dispersion (graphene oxide powder is purchased from the market, the same below), put it in a vacuum filtration device and filter to form a graphene oxide film, and separate it from the filter paper after drying to form a thickness A flexible self-supporting graphene oxide film of about 30 μm. The film was placed in an oven and reduced at 75°C for 60 minutes to form a partially reduced graphene oxide film. Prepare the zinc nitrate aqueous solution of 0.1mol / L, add the strong ammoniacal liquor that volume fraction is 4%, place the graphene oxide film of partial reduction again in solution, under 75 ℃ hydrothermal reaction 60min, grow porous zinc oxide ( figure 1 ), and then prepared graphene / porous zinc oxide composite film ( figure 2 ). The thin film can also be further reduced to the desired reduction degree in hig...
Embodiment 2
[0030] A preparation method of graphene / porous zinc oxide composite film, comprising the following steps:
[0031] Prepare 20 mL of a 2 mg / mL graphene oxide aqueous dispersion, place it in a vacuum filtration device and filter to form a graphene oxide film, and separate it from the filter paper after drying to form a flexible self-supporting graphene oxide film with a thickness of about 50 μm. The film was placed in an oven for reduction at 85° C. for 90 min to form a partially reduced graphene oxide film. Formulated 0.1
[0032] mol / L zinc nitrate aqueous solution, add concentrated ammonia water with a volume fraction of 4%, then place the partially reduced graphene oxide film in the solution, and conduct a hydrothermal reaction at 85°C for 80 minutes to grow porous zinc oxide on the surface of the film, and the obtained porous The morphology of zinc oxide is as Figure 5 As shown, the pore size is about 50 nm to 1 μm. The macroscopic morphology of the obtained graphene / po...
Embodiment 3
[0034] A preparation method of graphene / porous zinc oxide composite film, comprising the following steps:
[0035] Prepare 25mL of 1mg / mL graphene oxide aqueous dispersion (graphene oxide powder is purchased from the market, the same below), put it in a vacuum filtration device and filter to form a graphene oxide film, and separate it from the filter paper after drying to form a thickness A flexible self-supporting graphene oxide film of about 30 μm. The film was placed in an oven and reduced at 60°C for 30 minutes to form a partially reduced graphene oxide film. Prepare a 0.1mol / L zinc nitrate aqueous solution, add concentrated ammonia water with a volume fraction of 4%, then place a partially reduced graphene oxide film in the solution, and conduct a hydrothermal reaction at 70°C for 30 minutes to grow porous zinc oxide on the surface of the film. Then the graphene / porous zinc oxide composite film was prepared. The thin film can also be further reduced to the desired reduc...
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