A kind of preparation method of silicon-doped high-performance graphene material
A graphene and silicon doping technology, applied in the field of graphene doping, can solve the problems of no environmental protection, mild reaction conditions, etc., and achieve the effects of low cost, mild reaction conditions and wide material sources
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Embodiment 1
[0033] A kind of preparation method of silicon-doped high-performance graphene material, described preparation method comprises the steps:
[0034] Step 1, adding graphene oxide to deionized water, and then adding a dispersant to ultrasonically disperse for 20 minutes to obtain a graphene oxide dispersion;
[0035] Step 2, adding the sodium hydroxide solution to the graphene oxide dispersion for 1 hour of microwave reaction to obtain an alkalized graphene oxide dispersion;
[0036] Step 3, adding ethyl silicate and tea polyphenols to absolute ethanol in sequence, stirring evenly, and slowly adding them dropwise into the alkalized graphene oxide dispersion for gradient microwave reaction for 3 hours to obtain a reaction mixture;
[0037] Step 4, adding hydrochloric acid to the reaction mixture until neutrality is formed, then ultrasonically reacting for 30 minutes, and obtaining graphene precipitation after filtration;
[0038] Step 5, putting the graphene precipitate into abs...
Embodiment 2
[0050] A kind of preparation method of silicon-doped high-performance graphene material, described preparation method comprises the steps:
[0051] Step 1, adding graphene oxide to deionized water, and then adding a dispersant to ultrasonically disperse for 40 minutes to obtain a graphene oxide dispersion;
[0052] Step 2, adding the sodium hydroxide solution to the graphene oxide dispersion and reacting with microwaves for 3 hours to obtain an alkalized graphene oxide dispersion;
[0053] Step 3, adding ethyl silicate and tea polyphenols to absolute ethanol in sequence, stirring evenly and slowly adding them dropwise to the alkalized graphene oxide dispersion for 5 hours of gradient microwave reaction to obtain a reaction mixture;
[0054]Step 4, adding hydrochloric acid to the reaction mixture until neutrality is formed, then ultrasonically reacting for 60 minutes, and obtaining graphene precipitation after filtration;
[0055] Step 5, put the graphene precipitate into abso...
Embodiment 3
[0067] A kind of preparation method of silicon-doped high-performance graphene material, described preparation method comprises the steps:
[0068] Step 1, adding graphene oxide to deionized water, and then adding a dispersant to ultrasonically disperse for 30 minutes to obtain a graphene oxide dispersion;
[0069] Step 2, adding the sodium hydroxide solution to the graphene oxide dispersion and reacting with microwaves for 2 hours to obtain an alkalized graphene oxide dispersion;
[0070] Step 3, adding ethyl silicate and tea polyphenols to absolute ethanol in sequence, stirring evenly, and slowly adding them dropwise into the alkalized graphene oxide dispersion liquid for gradient microwave reaction for 4 hours to obtain a reaction mixture;
[0071] Step 4, adding hydrochloric acid to the reaction mixture until neutrality is formed, then ultrasonically reacting for 50 minutes, and obtaining graphene precipitation after filtration;
[0072] Step 5, put the graphene precipita...
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