Preparation method for highly-dispersed few-layer graphene
A technology of graphene and graphene, which is applied in the field of preparation of highly dispersed and low-defect single-layer or few-layer graphene, can solve problems such as large thickness, high defect rate, and inability to obtain single-layer or few-layer graphene, and achieve sheet Thin layer, long stable time, which is conducive to the effect of large-scale production in the later stage
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[0046] The invention provides a kind of preparation method of graphene, comprises the following steps:
[0047] A) after mixing the graphene oxide dispersion and the tea polyphenols material, a mixed solution is obtained;
[0048] B) After passing an auxiliary gas into the mixed liquid obtained in the above steps and reacting, a reaction liquid is obtained; the auxiliary gas includes one or more of hydrogen, nitrogen and inert gases;
[0049] C) After post-processing the reaction solution obtained in the above steps, graphene is obtained.
[0050] In the present invention, firstly, the graphene oxide dispersion liquid and the tea polyphenols material are mixed to obtain a mixed liquid.
[0051] The present invention has no special restrictions on the tea polyphenol materials, and the conventional tea polyphenol materials well known to those skilled in the art can be used. Those skilled in the art can select and adjust according to actual application conditions, product requirem...
Embodiment 1
[0070] 1. Mix the graphene oxide slurry produced by Shandong Oupo New Material Co., Ltd. with an appropriate amount of water, and add tea polyphenols to obtain a mixed solution A, wherein the mass fraction of the graphene oxide slurry is 3‰, a total of 4000g, tea polyphenols The mass of the phenol was 12 g, and the graphene oxide tea polyphenol aqueous dispersion was obtained by ultrasonication and stirring at room temperature. The ultrasonic time is 30min, the ultrasonic frequency is 40KHz, and the stirring speed is 350r / min.
[0071] 2. Bubble N into the mixed solution A obtained in step 1 2 , wherein the nitrogen flow rate is 80mL / min, the duration of bubbling is 30min, and the stirring speed is 100r / min; the mixture B is obtained.
[0072] 3. Keep N in the mixed solution B obtained in step 2 2 was blown in, heated to 80°C, and continuously stirred for 480min at a speed of 300r / min to obtain a mixed solution C.
[0073] 4. Wash and dry the mixed solution C obtained in st...
Embodiment 2
[0085] 1. Mix the graphene oxide slurry produced by Shandong Oupo New Material Co., Ltd. with an appropriate amount of water, and add tea polyphenols to obtain a mixed solution A, wherein the mass fraction of the graphene oxide slurry is 3‰, a total of 4000g, tea polyphenols The mass of the phenol was 24 g, and the graphene oxide tea polyphenol aqueous dispersion was obtained by ultrasonication and stirring at room temperature. The ultrasonic time is 30min, the ultrasonic frequency is 40KHz, and the stirring speed is 350r / min.
[0086] 2. Bubble H into the mixed solution A obtained in step 1 2 , wherein the hydrogen flow rate is 60ml / min, the duration of bubbling is 30min, and the stirring speed is 100r / min; the mixture B is obtained.
[0087] 3. Keep H in the mixed solution B obtained in step 2 2 was blown in, heated to 80°C, and continuously stirred for 480min at a speed of 300r / min to obtain a mixed solution C.
[0088] 4. Wash and dry the mixed solution C obtained in st...
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