Preparation method of three-dimensional graphene/hollow carbon sphere composite material
A composite material and graphene technology, which is applied in the preparation/purification of carbon, graphene, nano-carbon, etc., can solve the problem of easy collapse after removing the template, and achieve the effect of low requirements for experimental equipment, prevention of damage, and simple preparation process
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Embodiment 1
[0015] At room temperature, mix 0.8 wt% phenol aqueous solution and 3 wt% polystyrene ball aqueous solution uniformly. The polystyrene ball has a particle size of 500 nm. Under strong stirring, add hexamethylenetetramine to the above mixture. The mass ratio of phenol: polystyrene ball: hexamethylenetetramine is 1:0.8:0.7; transfer the above reaction liquid to the polytetrafluoroethylene reactor at 130 o C reaction for 4 hours, natural cooling to room temperature and centrifugal washing to obtain a hollow carbon sphere precursor, and then prepare a 5 wt% hollow carbon sphere precursor aqueous solution; at room temperature, 15 mg graphite oxide is added to 150 mg hollow carbon sphere precursor aqueous solution Under the protection of pure nitrogen, the mixed dispersion was obtained by sonication for 1 h, suction filtered, and dried at room temperature; the product was placed in a tube furnace, and the heating rate was controlled to 0.5 o C∕min, the gas flow rate is 50 mL∕min, first...
Embodiment 2
[0017] At room temperature, the 1.0 wt% phenol aqueous solution and the 5 wt% polymethyl methacrylate ball aqueous solution are mixed uniformly, the particle size of the polymethyl methacrylate ball is 400 nm, and the hexamethylenetetramine is added to the In the above mixed liquid, the mass ratio of the above phenol: polymethyl methacrylate ball: hexamethylenetetramine is 1:2.4:0.7; the above reaction liquid is transferred to a polytetrafluoroethylene reactor at 150 o C reaction for 4 hours, natural cooling to room temperature and centrifugal washing to obtain the hollow carbon sphere precursor, which was then prepared into a 4 wt% hollow carbon sphere precursor aqueous solution; at room temperature, 300 mg graphite oxide was added to 150 mg hollow carbon sphere precursor aqueous solution Under the protection of pure argon, the mixed dispersion was obtained, filtered, and dried at room temperature; the product was placed in a tube furnace, and the heating rate was controlled to ...
Embodiment 3
[0019] At room temperature, mix 1.2 wt% phenol aqueous solution and 4 wt% polystyrene ball aqueous solution uniformly, the particle size of the polystyrene ball is 200 nm, and add hexamethylenetetramine to the above mixed solution under strong stirring. The mass ratio of phenol: polystyrene ball: hexamethylenetetramine is 1:1.6:0.7; transfer the above reaction liquid to a polytetrafluoroethylene reactor at 180 o C reaction for 4 hours, natural cooling to room temperature and centrifugal washing to obtain the hollow carbon sphere precursor, which was then prepared into a 3 wt% hollow carbon sphere precursor aqueous solution; at room temperature, 1.5 g of graphite oxide was added to 150 mg hollow carbon sphere precursor aqueous solution Under the protection of pure nitrogen, the mixed dispersion was obtained by sonication for 2 h, and then filtered and dried at room temperature; the product was placed in a tube furnace, and the heating rate was controlled to 1 o C∕min, the gas flow...
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