Defect-site-rich titanium-dioxide-and-graphene composite nanometer photocatalyst and preparing method for carbon-nanometer-tube-and-graphene composite carbon material

A nano-photocatalyst and graphene composite technology, applied in the direction of carbon nanotubes, titanium dioxide, multi-wall carbon nanotubes, etc., can solve the problems of poor water solubility of carbon nanotubes, limited application scope, easy to agglomerate, etc., and achieve TiO2 nanometers. Small particle size, extended application range, low cost effect

Active Publication Date: 2017-04-26
淄博冠海工贸有限公司
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Problems solved by technology

Although carbon nanotubes and graphene have shown excellent new energy and application prospects in many fields due to their excellent performance, there are also many problems in the specific applica

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  • Defect-site-rich titanium-dioxide-and-graphene composite nanometer photocatalyst and preparing method for carbon-nanometer-tube-and-graphene composite carbon material
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  • Defect-site-rich titanium-dioxide-and-graphene composite nanometer photocatalyst and preparing method for carbon-nanometer-tube-and-graphene composite carbon material

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[0031] A preparation method of a titanium dioxide / graphene composite nano photocatalyst rich in defect sites, comprising the following steps:

[0032] A, using graphite as a raw material, adopting the Hummer method to prepare graphene oxide, and ultrasonically dispersing the prepared graphene oxide into an alcohol solution to obtain a graphene oxide suspension;

[0033] B, the titanium source is dispersed in the graphene oxide suspension obtained in step A, and the graphene oxide suspension containing the titanium source is obtained;

[0034] C, configure precipitant alcohol aqueous solution;

[0035] D. Add the precipitant alcohol aqueous solution obtained in step C dropwise to the graphene oxide suspension containing titanium source obtained in step B under stirring conditions;

[0036] E. Transfer the suspension obtained in step D into a polytetrafluoroethylene liner, heat it to 120 ° C ~ 220 ° C after airtight, after reacting for 3 h ~ 24 h, naturally cool to room temperatu...

Embodiment 1

[0048] Accurately weigh 0.1 g of graphene oxide prepared by the Hummer method and ultrasonically disperse it in 100 mL of methanol solution to form suspension A; Form suspension B in 1 minute, the concentration of titanium tetrachloride in suspension B is 0.0364 M; Another configuration 50 mL concentration is the sodium borohydride solution of 0.292 M, under the stirring condition of 500 rev / mins, obtain in step C The alcoholic aqueous solution containing sodium borohydride was added dropwise in the suspension B, and after the dropwise addition was completed, it was transferred to a polytetrafluoroethylene liner, and reacted for 24 hours under solvothermal conditions at 160 ° C, and naturally cooled after the reaction to room temperature, suction filtration and washing to obtain a titanium dioxide / graphene composite nanocatalyst.

[0049] Accurately weigh 0.2 g of defect-rich titanium dioxide / graphene nanocatalyst and evenly spread it on the bottom of the magnetic boat, and pl...

Embodiment 2

[0051] Accurately weigh 0.1 g of graphene oxide prepared by the Hummer method and ultrasonically disperse it in 100 mL of ethanol solution to form suspension A; Form suspension B in 1 minute, the concentration of titanium tetrachloride in suspension B is 0.0182 M; Another configuration 50 mL concentration is the sodium borohydride solution of 0.146 M, under the agitation condition of 1000 rev / mins, obtain in step C The aqueous alcohol solution containing sodium borohydride was added dropwise in the suspension B, and after the dropwise addition was completed, it was transferred to a polytetrafluoroethylene liner, and reacted for 12 hours under solvothermal conditions at 180 ° C, and cooled naturally after the reaction to room temperature, suction filtration and washing to obtain a titanium dioxide / graphene composite nanocatalyst.

[0052] Accurately weigh 0.2 g of defect-rich titanium dioxide / graphene nanocatalyst and evenly spread it on the bottom of the magnetic boat, and pla...

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Abstract

The invention discloses a defect-site-rich titanium-dioxide-and-graphene composite nanometer photocatalyst and a preparing method for a carbon-nanometer-tube-and-graphene composite carbon material. The solvent thermal method is adopted, an alcohol serves as a solvent, hydroboron serves as a reducing agent and a precipitating agent, titanium tetrachloride or tetrabutyl titanate serves as a titanium source, the high-dispersion titanium-dioxide-and-graphene nanometer catalyst is prepared with the one-step method, and control synthesis of titanium dioxide nanometer particles and defect sites is achieved; then methane serves as a carbon source, and the carbon-nanometer-tube-and-graphene composite carbon material is prepared with the chemical vapor deposition method. According to the preparing method, using of precious metal is avoided, and the catalyst prepared with the method is low in cost, and is hopefully used for preparing a carbon nanometer tube and a graphene carbon-nanometer-tube composite material in a large-scale mode.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation for carbon nanotube growth, and in particular relates to a preparation method and application of a titanium dioxide graphene composite nano photocatalyst rich in defect sites. Background technique [0002] Since Japanese scientists obtained carbon nanotubes (Carbon nanotubes, CNTs) by the arc discharge method in 1991, due to the high aspect ratio of CNTs, unique structure, mechanical and physical and chemical properties, they have been widely used in electronics, biology, materials science, catalysis, etc. The field has shown extraordinary application prospects, which has attracted great attention from scientific researchers, and has become the successor to C 60 Another popular carbon material. The preparation methods of carbon nanotubes mainly include arc discharge method, laser evaporation method, template method, ball milling method, flame method and chemical vapor deposition meth...

Claims

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Application Information

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IPC IPC(8): B01J21/18C01G23/053B82Y30/00C01B32/162
CPCB01J21/18B01J35/004C01B2202/06C01B2202/36C01G23/0536C01P2002/72C01P2002/85C01P2004/04C01P2004/80C01P2006/12
Inventor 曹明曹飞宛楠范国利雷远
Owner 淄博冠海工贸有限公司
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