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Preparation method of defect-rich titanium dioxide graphene composite nanophotocatalyst and carbon nanotube graphene composite carbon material

A nano-photocatalyst and graphene composite technology, applied in the direction of titanium dioxide, carbon nanotubes, multi-walled carbon nanotubes, etc., can solve the problems of poor water solubility of carbon nanotubes, limited application range, and easy agglomeration, etc., reaching TiO2 nanometer The effect of small particle size, expanded application range, and low cost

Active Publication Date: 2019-08-06
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 application of the two. For example, when graphene is used alone, it is easy to agglomerate, which affects its Performance; the poor water solubility of carbon nanotubes severely limits its application range

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  • Preparation method of defect-rich titanium dioxide graphene composite nanophotocatalyst and carbon nanotube graphene composite carbon material
  • Preparation method of defect-rich titanium dioxide graphene composite nanophotocatalyst and carbon nanotube graphene composite carbon material
  • Preparation method of defect-rich titanium dioxide graphene composite nanophotocatalyst and carbon nanotube graphene composite carbon material

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preparation example Construction

[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 method for preparing a titanium dioxide graphene composite nano photocatalyst rich in defective sites and a carbon nanotube graphene composite carbon material. The invention adopts a solvothermal method, using alcohol as the solvent and borohydride as the reducing agent. and precipitant, using titanium tetrachloride or tetrabutyl titanate as the titanium source to prepare a highly dispersed titanium dioxide graphene nanocatalyst in one step, achieving controlled synthesis of titanium dioxide nanoparticles and defective sites, and then using methane as the carbon source. Carbon nanotube-graphene composite carbon materials were prepared using chemical vapor deposition. The preparation method of the present invention avoids the use of precious metals, and the prepared catalyst is low in cost, and is expected to be used in the macro-scale preparation of carbon nanotubes and graphene carbon nanotube composite carbon materials.

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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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18C01G23/053B82Y30/00C01B32/162
CPCC01G23/0536B01J21/18C01B2202/06C01B2202/36C01P2004/80C01P2006/12C01P2004/04C01P2002/72C01P2002/85B01J35/39
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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