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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

Active Publication Date: 2013-03-20
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existence and distribution of these oxygen-containing groups and defects on the surface of graphene has its randomness. This uncontrollability will definitely affect the loading of nanoparticles on the surface of graphene, and will also cause the accumulation of nanoparticles, which seriously affects the Photocatalytic performance

Method used

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Examples

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Effect test

preparation example Construction

[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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Abstract

The invention relates to a method for preparing graphene, a method for carrying out graphene surface modification by taking one or more than two of pyrene, pyrene derivatives, naphthalene and naphthalene derivatives as a modifying agent as well as a method for manufacturing TiO2-graphene nano-composite material by utilizing the reaction of the surface-modified graphene and a titanium-containing compound and a product thereof. The method for preparing graphene comprises the steps of (a1) reducing dispersive graphite oxide in inert solvent by using a reducing agent to form a graphene-containing reaction mixture, wherein the reducing agent comprises sodium borohydride, vitamin C or combination thereof; and (a2) isolating graphene from the reaction mixture. The obtained graphene is flocculent and the TiO2-graphene nano-composite material has efficient photocatalytic performance.

Description

technical field [0001] The invention relates to a method for preparing graphene, a method for surface modification of graphene, and preparation of TiO 2 -The method of graphene nanocomposite material, and the product of described method, relate in particular to a kind of TiO that is used for photocatalysis 2 -Preparation method of graphene nanocomposite material and raw material thereof. Background technique [0002] Photocatalytic technology has a wide range of applications in many fields such as wastewater treatment, gas purification, sterilization, self-cleaning materials, dye-sensitized solar cells, cosmetics, and gas sensors. At present, most of the photocatalysts are N-type semiconductors, among which TiO 2 Because of its non-toxic, high catalytic activity, strong oxidation ability, good stability, cheap and easy to obtain, etc., it is currently the most commonly used photocatalyst. [0003] TiO 2 It is a wide-bandgap semiconductor that can only be excited by ultra...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01G23/053B01J21/18C01B32/184C01B32/194
Inventor 陈涛谷金翠肖鹏
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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