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Method for preparing titanium dioxide/mesoporous carbon composite photocatalyst by electron beam irradiation

An electron beam irradiation, titanium dioxide technology, applied in physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc. problem, to achieve the effect of enhancing photocatalytic performance, good photocatalytic effect, and convenient operation

Inactive Publication Date: 2010-09-15
SHANGHAI UNIV
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Problems solved by technology

[0004] The above traditional treatment methods have the following problems: 1. The cost and operating cost are too high, which easily causes secondary pollution; The treatment effect of organic wastewater is not good; 3. The treatment cycle is long
[0006] Nano-TiO 2 It is one of the most researched and most promising high-tech materials for semiconductor materials in the field of environmental protection in recent years, but TiO 2 There are still two disadvantages of wide band gap and easy electron-hole recombination.

Method used

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  • Method for preparing titanium dioxide/mesoporous carbon composite photocatalyst by electron beam irradiation
  • Method for preparing titanium dioxide/mesoporous carbon composite photocatalyst by electron beam irradiation
  • Method for preparing titanium dioxide/mesoporous carbon composite photocatalyst by electron beam irradiation

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Embodiment 1

[0024] The preparation process and steps of this embodiment are as follows:

[0025] a. Weigh 0.025g mesoporous carbon (CMK-3) with an electronic balance and add it to 20mL 0.06mol / L TiF 4 in aqueous solution, and ultrasonic for 30 minutes to make it evenly mixed;

[0026] b. Transfer the above solution into a self-made sealing bag, place it in the irradiation area under the electron accelerator for irradiation, and the irradiation dose is 280kGy;

[0027] c. Transfer the above solution into a 100mL beaker, seal it with a parafilm and put it in an oven at 60°C for 20 hours;

[0028] d. wash the reaction product with water and ethanol successively;

[0029] e. Dry the washed product in a vacuum oven at 60°C for 6 hours to obtain TiO 2 / CMK-3 composite photocatalyst.

Embodiment 2

[0033] The steps in this embodiment are exactly the same as those in Embodiment 1 above. The difference is: the electron beam irradiation dose in this embodiment is 140kGy, and finally a composite photocatalyst is prepared.

Embodiment 3

[0035] The steps in this embodiment are exactly the same as those in Embodiment 1 above. The difference is that the electron beam irradiation dose in this embodiment is 420kGy, and finally a composite photocatalyst is prepared.

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Abstract

The invention relates to a method for preparing titanium dioxide / mesoporous carbon composite photocatalyst by electron beam irradiation, belonging to the technical field of radiation chemistry and photocatalyst preparation technology. The preparation method mainly comprises the following steps of: firstly, adding mesoporous carbon CMK-3 into TiF4 solution, uniformly mixing by ultrasound, pouring the solution into a self encapsulation, irradiating under an 2.5MeV and 40mA electronic accelerator with the irradiation dose of 140-700Kgy, wherein the mass ratio of the mesoporous carbon and the carbon tetrafluoride is 0.17, i.e. CMK-3: TiF4=0.17; secondly, putting the solution after irradiation into an oven to react for 20h under the temperature of 60 DEG C; and thirdly, washing and drying to finally obtain obtaining TiO2 / CMK-3 composite photocatalyst. A product has favorable the photocatalysis performance.

Description

technical field [0001] The invention relates to a method for preparing a titanium dioxide / mesoporous carbon composite photocatalyst by electron beam irradiation, and belongs to the technical field of radiation chemistry and photocatalyst preparation technology. Background technique [0002] With the rapid development of my country's industry, the problem of water pollution is becoming more and more serious. The environmental problems in our country at present and for quite a long time in the future are mainly water environment problems, and the water environment problems are mainly the pollution of organic wastewater. [0003] Theoretically speaking, a variety of physical chemical methods and biological methods can be used for the pollution of organic wastewater, such as physical chemical methods (commonly used are adsorption, membrane technology flocculation sedimentation, ion exchange, dialysis, etc.), chemical methods (such as oxidation method, coagulation method, electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J37/34C02F1/30
Inventor 焦正张海娇徐盼盼杜贵东阚琎
Owner SHANGHAI UNIV
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