Preparation method for graphene composite material loaded with nano metal particles
A technology of nano-metal particles and composite materials, which is applied in the field of preparation of graphene composite materials, and can solve the problems of high oxygen content and insufficient purity of graphene
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[0018] The present invention provides the preparation process flow of a novel carbon material as follows:
[0019] Natural flake graphite→graphite oxide→metal nitric acid compound and graphene mixture→graphene composite material loaded with nano metal particles.
[0020] like figure 1 As shown, the specific preparation process steps are as follows:
[0021] 1. Preparation of graphite oxide: using graphite flakes, such as natural flake graphite with a purity of 99.5%, through the Hummers method to prepare graphite oxide;
[0022] 2. Preparation of graphene oxide solution: adding the prepared graphite oxide into water for ultrasonic dispersion to form a graphene oxide solution uniformly dispersed in a monolithic layer;
[0023] 3. Preparation of the nitrate mixed solution of graphene oxide and metal M: adding the nitrate powder of metal M to the above graphene oxide solution, and stirring at room temperature for 1-24 h to obtain a uniformly dispersed mixed solution; wherein, t...
Embodiment 1
[0031] The preparation process flow of the graphene composite material loaded with nano metal particles of the present embodiment is as follows:
[0032] (1) Natural flake graphite: purity 99.5%.
[0033] (2) Graphite oxide: Graphite oxide was prepared by a modified Hummers method. The specific steps include adding 20g of 50-mesh graphite flakes, 10g of potassium persulfate and 10g of phosphorus pentoxide into concentrated sulfuric acid at 80° C., stirring evenly, cooling for more than 6 hours, washing to neutrality, and drying. The dried sample was added to 0°C, 230mL of concentrated sulfuric acid, and then 60g of potassium permanganate was added. The temperature of the mixture was kept below 20°C for half an hour, and then kept in an oil bath at 35°C for 2 hours, and 920mL was slowly added. Deionized water. After 15min, add 2.8L of deionized water (which contains 50mL of hydrogen peroxide with a concentration of 30%), then the color of the mixture changes to bright yellow,...
Embodiment 2
[0038] The preparation process flow of the graphene composite material loaded with nano metal particles of the present embodiment is as follows:
[0039](1) Natural flake graphite: purity 99.5%.
[0040] (2) Graphite oxide: Graphite oxide was prepared by a modified Hummers method. The specific steps include adding 20g of 50-mesh graphite flakes, 10g of potassium persulfate and 10g of phosphorus pentoxide into concentrated sulfuric acid at 80° C., stirring evenly, cooling for more than 6 hours, washing to neutrality, and drying. The dried sample was added to 200 mL of concentrated sulfuric acid at 0 °C, and then 60 g of potassium permanganate was added. The temperature of the mixture was kept below 20 °C for 5 minutes, and then kept in an oil bath at 35 °C for 1 hour, and then 920 mL was slowly added. Deionized water. After 15min, add 2.8L of deionized water (which contains 50mL of hydrogen peroxide with a concentration of 30%), then the color of the mixture changes to bright...
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