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Preparation method for titanium dioxide/carbon nanotube composite nanosheets

A technology of carbon nanotube composite and titanium dioxide, which is applied in the fields of titanium dioxide, titanium oxide/hydroxide, chemical instruments and methods, etc., can solve the problems such as the synthesis and application of titanium dioxide/carbon nanotube composite nanosheets that have not been reported, and achieve Low price, simple production process, and the effect of saving production costs

Inactive Publication Date: 2019-04-12
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the synthesis and application of titanium dioxide / carbon nanotube composite nanosheets have not been reported so far.

Method used

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  • Preparation method for titanium dioxide/carbon nanotube composite nanosheets
  • Preparation method for titanium dioxide/carbon nanotube composite nanosheets
  • Preparation method for titanium dioxide/carbon nanotube composite nanosheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Put 125mL of deionized water at 4°C into a 500mL round bottom flask, slowly add 0.8mL (1.55g) of TiCl in an ice-water bath with constant stirring 4 After continuing to stir for 1 h, slowly add a 2M ammonia solution dropwise until the pH value in the solution is 7 and a white precipitate is formed, and then centrifuged and washed 5 times with deionized water at a centrifugal speed of 8000 rpm. Then disperse the white precipitate in 25mL of deionized water, slowly add 7mL of hydrogen peroxide dropwise under constant stirring, continue to stir until the solution turns into a yellow transparent solution, and dilute the solution with deionized water to the theoretical TiO 2 The content is 10 mg / ml and placed in a refrigerator at 4°C (referred to as solution A).

[0031]Ultrasonic disperse 0.2g of carbon nanotubes with a diameter of 8nm in a concentrated nitric acid solution with a concentration of 15M, reflux at 120°C for 12h, wash the acidified carbon nanotubes with deioniz...

Embodiment 2

[0033] Put 250mL of deionized water at 4°C into a 500mL round-bottomed flask, and slowly add 2.5g of TiCl in an ice-water bath with constant stirring 3 After continuing to stir for 1 h, slowly add NaOH solution with a concentration of 3M dropwise until the pH value in the solution is 8 to form a white precipitate, which is then centrifuged and washed 5 times with deionized water at a centrifugation speed of 6000 rpm. Then disperse the white precipitate in 50mL of deionized water, slowly add 14mL of hydrogen peroxide dropwise under constant stirring, continue to stir until the solution turns into a yellow transparent solution, and dilute the solution with deionized water to the theoretical TiO 2 The content was 10 mg / ml and placed in a refrigerator at 4°C (solution A).

[0034] Ultrasonic disperse 0.2g of carbon nanotubes with a diameter of 8nm in a concentrated nitric acid solution with a concentration of 15M, reflux at 120°C for 6h, wash the acidified carbon nanotubes with de...

Embodiment 3

[0036] Put 300 mL of deionized water at 2 °C into a 1000 mL round bottom flask, and slowly add 2.0 g of Ti(SO 4 ) 2 After continuing to stir for 1 h, slowly add a concentration of 1M sodium hydroxide aqueous solution dropwise until the pH value in the solution is 7 and a white precipitate is formed, and then centrifuged and washed 5 times with deionized water at a centrifugal speed of 6000 rpm. Then disperse the white precipitate in 60mL of deionized water, slowly add 20mL of hydrogen peroxide dropwise under constant stirring, continue to stir until the solution turns into a yellow transparent solution, dilute the solution with deionized water to the theoretical TiO 2 The content was 10 mg / ml and placed in a refrigerator at 4°C (solution A).

[0037] Ultrasonic disperse 0.1 g of carbon nanotubes with a diameter of 10-20 nm in a concentrated nitric acid solution with a concentration of 15 M, reflux at 120 ° C for 6 h, wash the acidified carbon nanotubes with deionized water fo...

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Abstract

The invention provides a preparation method for titanium dioxide / carbon nanotube composite nanosheets, and relates to the composite nanosheets. The preparation method comprises the following steps: adding a titanium source into deionized water, performing stirring in an ice water bath, adding an alkaline solution, performing a reaction to generate a white precipitate, performing centrifugation toremove a supernatant liquid, performing washing by using water, dispersing the white precipitate into water, adding hydrogen peroxide until the solution is yellow and transparent, adding deionized water for dilution to obtain a titanium peroxide complex aqueous solution, and storing the aqueous solution in a refrigerator for standby application; dispersing the carbon nanotubes into a nitric acid solution, performing reflux treatment, performing centrifugal washing, and dispersing the carbon nanotubes into deionized water; mixing the titanium peroxide complex aqueous solution and the carbon nanotube dispersion liquid, performing stirring, and allowing the stirred material to stand for aging; and freezing the mixed solution obtained after stand aging, performing drying to remove water to obtain a precursor of bulk-shaped dried titanium dioxide / carbon nanotube composite nanosheets, and performing calcination to obtain the titanium dioxide / carbon nanotube composite nanosheets. The titaniumdioxide / carbon nanotube composite nanosheets provided by the invention have a porous two-dimensional laminated structure.

Description

technical field [0001] The invention relates to composite nanosheets, in particular to a preparation method of titanium dioxide / carbon nanotube composite nanosheets. Background technique [0002] Due to its good chemical stability, high catalytic activity, non-toxic and harmless, and low price, nano-titanium dioxide is widely used in the research of photocatalysis / photoelectrocatalysis, lithium-ion batteries and solar batteries. However, single titanium dioxide nanomaterials have disadvantages such as low light utilization efficiency, small specific surface area and poor electrical conductivity, which limit the industrial application of nano titanium dioxide. Therefore, nano-titanium dioxide is often combined with other nano-materials to improve its performance in various aspects. Carbon nanotubes are one-dimensional nanomaterials with stable chemical properties and unique structures. They have the advantages of good electrical conductivity, high specific surface area, and ...

Claims

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Application Information

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IPC IPC(8): C01G23/047B01J21/18B01J35/00B82Y30/00B82Y40/00H01M4/48H01M4/587H01M10/0525
CPCH01M4/483H01M4/587H01M10/0525B82Y30/00B82Y40/00C01B32/168C01G23/047B01J21/185C01P2004/80C01P2004/03C01P2004/04B01J35/39Y02E60/10
Inventor 许清池李唐徐俊
Owner XIAMEN UNIV
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