A kind of preparation method of two-dimensional porous silica nanosheet
A technology of porous silica and nano-silica, applied in the direction of silica, silicon oxide, nanotechnology, etc., to achieve high yield, wide application value, and high repeatability
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Embodiment 1
[0016] Step (1). With 10mg graphene oxide (for its infrared spectrum, see figure 2 Middle curve a), 50mg of tetraethyl orthosilicate, 10mg of ammonia water with a concentration of 30%, and 50g of mixed solvent were added to the reactor, and after ultrasonication for 10 minutes, stirring was carried out for 105 minutes to form a nano-silica supported graphene oxide solution ( The infrared spectrum of graphene oxide supported by nano-silica in solution is shown in figure 2 Middle curve b); the mixed solvent is a mixture of water and ethanol with a volume ratio of 1:5;
[0017] Step (2). After centrifuging the graphene oxide solution supported by nano-silica, pour off the supernatant, then add dehydrated alcohol equal to the volume of the supernatant that was poured out this time; centrifuge again, and pour off the supernatant 1. Add the same volume of absolute ethanol as the supernatant that was poured out this time; centrifuge for the third time, pour off the supernatant, ad...
Embodiment 2
[0021] Step (1). Add 100mg of graphene oxide, 1g of tetraethyl orthosilicate, 10g of ammonia water with a concentration of 10%, and 200g of mixed solvent into the reactor. After ultrasonication for 60 minutes, stir for 24 hours to form a nano-silica load. Graphene oxide solution; The mixed solvent is a mixed solution of water and ethanol with a volume ratio of 1:5;
[0022] Step (2). After centrifuging the graphene oxide solution supported by nano-silica, pour off the supernatant, then add dehydrated alcohol equal to the volume of the supernatant that was poured out this time; centrifuge again, and pour off the supernatant 1. Add the same volume of absolute ethanol as the supernatant that was poured out this time; centrifuge for the third time, pour off the supernatant, add absolute ethanol that is the same volume as the supernatant that was poured out this time; centrifuge for the fourth time , after discarding the supernatant, the centrifuged product was dissolved in water e...
Embodiment 3
[0026] Step (1). Add 20mg of graphene oxide, 400mg of tetraethyl orthosilicate, 200mg of ammonia water with a concentration of 20%, and 240g of mixed solvent into the reactor. After ultrasonication for 30 minutes, stir for 12 hours to form a nano-silica load. Graphene oxide solution; The mixed solvent is a mixed solution of water and ethanol with a volume ratio of 1:5;
[0027] Step (2). After centrifuging the graphene oxide solution supported by nano-silica, pour off the supernatant, then add dehydrated alcohol equal to the volume of the supernatant that was poured out this time; centrifuge again, and pour off the supernatant 1. Add the same volume of absolute ethanol as the supernatant that was poured out this time; centrifuge for the third time, pour off the supernatant, add absolute ethanol that is the same volume as the supernatant that was poured out this time; centrifuge for the fourth time , after pouring off the supernatant, the centrifuged product was dissolved in wa...
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