Novel titanium dioxide-graphene nano-composite material as well as manufacturing method and application thereof
A technology of nanocomposite materials and composite materials, which is applied in the field of preparation of TiO2-graphene nanocomposite materials and their raw materials, and can solve problems affecting nanoparticle loading and photocatalytic performance
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[0072] Preparation method of titanium dioxide-graphene nanocomposite material and titanium dioxide-graphene nanocomposite material
[0073] The preparation method of the titanium dioxide-graphene nanocomposite material of the present invention comprises the following steps: make a solution containing surface-modified graphene and alcohols react with a titanium-containing compound, and make the titanium dioxide-graphene nanocomposite material, said The composite material has a plurality of titanium dioxide-graphene composite nanoparticles, each nanoparticle includes surface-modified graphene and a plurality of titanium dioxide particles dispersed on the surface of the graphene, and the surface-modified graphene is obtained by using a The modifier modifies graphene, and the modifier includes one or two or more of pyrene, pyrene derivatives, naphthalene, and naphthalene derivatives. In terms of the total weight of the composite material, the composite material includes 5wt% to 20...
Embodiment 1
[0100] Present embodiment prepares Graphene, surface-modified Graphene and composite material with the following steps:
[0101] Prepare graphene:
[0102] (1) Take 1g of graphite in a flask and add 2g of NaNO 3 , and then put it under the condition of an alcohol lamp bath, add 50ml of concentrated H 2 SO 4 , and slowly added 5 g KMnO while keeping stirring 4 , after which the flask was moved to room temperature and stirred for 3 days.
[0103] (2) While keeping stirring, heat the solution obtained in (1) to 98°C, and then slowly add 20mL of H 2 SO 4 , keep stirring for 2 hours. Then the flask was cooled to 50°C, and 10 mL of 30% H 2 o 2 , and stirred at room temperature for 2 hours.
[0104] (3) Filter the solution of (2), and then use 0.5wt%H 2 SO 4 Wash several times, then disperse and filter again, wash with 1wt% HCl, wash with deionized water, disperse with water again, dialyze for 1 day, filter, and dry to obtain graphite oxide.
[0105] (4) Weigh 50mg of gra...
Embodiment 2
[0113] Present embodiment prepares Graphene, surface-modified Graphene and composite material with the following steps:
[0114] Prepare graphene:
[0115] (1) Take 10g of graphite in a flask and add 10g of NaNO 3 , then put it under the condition of alcohol lamp bath, add 500mL concentrated H 2 SO 4 , and slowly added 25g KMnO while keeping stirring 4 , after which the flask was moved to room temperature and stirred for 10 days.
[0116] (2) While keeping stirring, heat the solution obtained in (1) to 98°C, and then slowly add 2100mL of H 2 SO 4 , and kept stirring for 5 hours. Then the flask was cooled to 50°C, and 50 mL of 30% H 2 o 2 , stirred at room temperature for 10 hours.
[0117] (3) Filter the solution of (2), and then use 3wt%H 2 SO 4 Wash several times, then disperse and filter again, wash with 3wt% HCl, wash with deionized water, disperse with water again, dialyze for 5 days, filter, and dry to obtain graphite oxide.
[0118] (4) Weigh 200mg of graphi...
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