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Method for preparing composite photocatalyst of titanium oxide/multi-wall carbon nano pipe by electron-beam irradiation

A technology of multi-walled carbon nanotubes and electron beam irradiation, which can be used in physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc. problem, to achieve the effect of convenient operation, low cost and good photocatalytic effect

Inactive Publication Date: 2010-03-17
SHANGHAI UNIV
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  • Claims
  • Application Information

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Problems solved by technology

But TiO 2 The forbidden band width is greater than 3.0eV, the quantum efficiency in the visible light region is low, and the recombination rate of photogenerated carriers (electrons and holes) is high, which leads to a decrease in the quantum confinement rate, affects the catalytic efficiency, and seriously restricts the TiO 2 practical application of

Method used

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  • Method for preparing composite photocatalyst of titanium oxide/multi-wall carbon nano pipe by electron-beam irradiation
  • Method for preparing composite photocatalyst of titanium oxide/multi-wall carbon nano pipe by electron-beam irradiation
  • Method for preparing composite photocatalyst of titanium oxide/multi-wall carbon nano pipe by electron-beam irradiation

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Embodiment 1

[0021] The preparation process and steps of this embodiment are as follows:

[0022] a. Weigh 0.025g of multi-walled carbon nanotubes (MWCNTs) with an electronic balance and add to 40mL of 0.08mol / L TiF 4 In the aqueous solution, and ultrasonic for 30min to make it evenly mixed;

[0023] b. Transfer the above solution to a self-made sealed bag, and place it in the irradiation area under the electron accelerator for irradiation, the irradiation dose is 280kGy;

[0024] c. Transfer the irradiated solution into a 200mL beaker, seal it with a parafilm and put it in an oven at 60°C for 20 hours;

[0025] d. Wash the reaction product with water and ethanol successively;

[0026] e. Put the washed product in a vacuum drying oven at 60℃ for 6 hours to dry, and finally get TiO 2 / MWCNTs composite photocatalyst.

Embodiment 2

[0028] The steps in this embodiment are exactly the same as the first embodiment described above. The difference is: weigh 0.050g MWCNTs and add it to TiF 4 In the aqueous solution, the composite photocatalyst is finally prepared.

Embodiment 3

[0030] The steps in this embodiment are exactly the same as the first embodiment described above. The difference is: weigh 0.075g MWCNTs and add to TiF 4 In the aqueous solution, the composite photocatalyst is finally prepared.

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Abstract

The invention relates to a method for preparing a composite photocatalyst of a titanium oxide / multi-wall carbon nano pipe by electron-beam irradiation, which belongs to the technical fields of radiation chemistry and the preparation technique of the photocatalyst. The method mainly comprises the following preparation processes: adding a multi-wall carbon nano pipe (MWCNTs) into a titanium fluoride(TiF4) solution, dispersing by ultrasonic and mixing fully and evenly, wherein the mass ratio of the multi-wall carbon nano pipe (MWCNTs) and the titanium fluoride (TiF4), i.e. the MWCNTs:the TiF4 isequal to 0.05-0.15; then, putting the solution in an irradiation area under an electron accelerator and carrying out irradiation processing, wherein the irradiation dose is 280-560KYy; afterwards, moving to the other container, putting into a baking oven after sealing a sealed opening, and reacting for 20 hours at the temperature of 60 DEG C; and afterwards, washing a product, drying and finallypreparing the composite photocatalyst of the titanium oxide / multi-wall carbon nano pipe. The composite photocatalyst obtained by the method has favorable photocatalysis property and better photocatalysis effect.

Description

Technical field [0001] The invention relates to a method for preparing a titanium dioxide / multi-wall carbon nanotube composite photocatalyst by electron beam irradiation, and belongs to the technical field of radiation chemistry and photocatalyst preparation technology. Background technique [0002] Looking into the 21st century, while mankind fully enjoys modern civilization, it is also facing a series of worldwide problems such as resource shortage, environmental pollution and natural ecological crisis. How to rationally develop and utilize resources and how to protect the environment is the key to achieving sustainable human development. At present, as air and water pollution continue to intensify, environmental pollution control has become a major issue that human society faces and needs to be solved urgently. [0003] Since the discovery of TiO in Fujishima, Japan in 1972 2 Since the single-crystal electrode photocatalyzed water splitting, photocatalytic technology has receiv...

Claims

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Application Information

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IPC IPC(8): B01J21/18B01J21/06B01J37/34B01J35/02
Inventor 焦正张海娇郭会娇徐盼盼吴若飞李智勇王琳
Owner SHANGHAI UNIV
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